200 files changed, 14198 insertions, 0 deletions

diff --git a/src/ext/Bal/Bal.wixext.sln b/src/ext/Bal/Bal.wixext.sln
new file mode 100644
index 00000000..0b4c5afa
--- /dev/null
+++ b/src/ext/Bal/Bal.wixext.sln
@@ -0,0 +1,319 @@
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+                {FED9D707-E5C3-4867-87B0-FABDB5EB0823}.Release|ARM64.Build.0 = Release|Any CPU
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+                {FED9D707-E5C3-4867-87B0-FABDB5EB0823}.Release|x64.Build.0 = Release|Any CPU
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+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|ARM64.ActiveCfg = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|ARM64.Build.0 = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|x64.Build.0 = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Debug|x86.Build.0 = Debug|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Release|Any CPU.ActiveCfg = Release|Any CPU
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+                {44297646-706D-4508-8E96-1B35B109694C}.Release|x64.ActiveCfg = Release|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Release|x64.Build.0 = Release|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Release|x86.ActiveCfg = Release|Any CPU
+                {44297646-706D-4508-8E96-1B35B109694C}.Release|x86.Build.0 = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|ARM64.ActiveCfg = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|ARM64.Build.0 = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|x64.Build.0 = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Debug|x86.Build.0 = Debug|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|Any CPU.Build.0 = Release|Any CPU
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+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|ARM64.Build.0 = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|x64.ActiveCfg = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|x64.Build.0 = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|x86.ActiveCfg = Release|Any CPU
+                {89D479FC-20DA-44D8-AE38-48F063223498}.Release|x86.Build.0 = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|Any CPU.Build.0 = Debug|Any CPU
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+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|ARM64.Build.0 = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|x64.Build.0 = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Debug|x86.Build.0 = Debug|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|Any CPU.Build.0 = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|ARM64.ActiveCfg = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|ARM64.Build.0 = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|x64.ActiveCfg = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|x64.Build.0 = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|x86.ActiveCfg = Release|Any CPU
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A}.Release|x86.Build.0 = Release|Any CPU
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|Any CPU.ActiveCfg = Debug|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|Any CPU.Build.0 = Debug|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|ARM64.ActiveCfg = Debug|ARM64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|ARM64.Build.0 = Debug|ARM64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|x64.ActiveCfg = Debug|x64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|x64.Build.0 = Debug|x64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|x86.ActiveCfg = Debug|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Debug|x86.Build.0 = Debug|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|Any CPU.ActiveCfg = Release|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|Any CPU.Build.0 = Release|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|ARM64.ActiveCfg = Release|ARM64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|ARM64.Build.0 = Release|ARM64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|x64.ActiveCfg = Release|x64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|x64.Build.0 = Release|x64
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|x86.ActiveCfg = Release|Win32
+                {B6F70281-6583-4138-BB7F-AABFEBBB3CA2}.Release|x86.Build.0 = Release|Win32
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|ARM64.ActiveCfg = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|ARM64.Build.0 = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|x64.Build.0 = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Debug|x86.Build.0 = Debug|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|Any CPU.Build.0 = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|ARM64.ActiveCfg = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|ARM64.Build.0 = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|x64.ActiveCfg = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|x64.Build.0 = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|x86.ActiveCfg = Release|Any CPU
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618}.Release|x86.Build.0 = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|ARM64.ActiveCfg = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|ARM64.Build.0 = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|x64.Build.0 = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Debug|x86.Build.0 = Debug|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|Any CPU.Build.0 = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|ARM64.ActiveCfg = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|ARM64.Build.0 = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|x64.ActiveCfg = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|x64.Build.0 = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|x86.ActiveCfg = Release|Any CPU
+                {8E707BF2-FD72-4649-8727-BA5955D48D40}.Release|x86.Build.0 = Release|Any CPU
+        EndGlobalSection
+        GlobalSection(SolutionProperties) = preSolution
+                HideSolutionNode = FALSE
+        EndGlobalSection
+        GlobalSection(NestedProjects) = preSolution
+                {CC4236FC-226E-4232-AB50-24CBEC4D314D} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+                {3D44B67D-A475-49BA-8310-E39F6C117CC9} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+                {44297646-706D-4508-8E96-1B35B109694C} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+                {1E86D8DF-DABD-4B6E-A812-64CD2040C73A} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+                {A4247D9D-3CC9-4BE1-B23A-BEC166AF3618} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+                {8E707BF2-FD72-4649-8727-BA5955D48D40} = {C70E3534-A018-4D0A-A340-916C9777EEF7}
+        EndGlobalSection
+        GlobalSection(ExtensibilityGlobals) = postSolution
+                SolutionGuid = {74046961-48BF-467A-A6C2-F886C75CE0BE}
+        EndGlobalSection
+EndGlobal
diff --git a/src/ext/Bal/CSharp.Build.props b/src/ext/Bal/CSharp.Build.props
new file mode 100644
index 00000000..81d24ad1
--- /dev/null
+++ b/src/ext/Bal/CSharp.Build.props
@@ -0,0 +1,13 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<!--
+  Do NOT modify this file. Update the canonical version in Home\repo-template\src\CSharp.Build.props
+  then update all of the repos.
+-->
+<Project>
+  <PropertyGroup>
+    <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>$([System.IO.Path]::GetFullPath($(MSBuildThisFileDirectory)wix.snk))</AssemblyOriginatorKeyFile>
+    <NBGV_EmitThisAssemblyClass>false</NBGV_EmitThisAssemblyClass>
+  </PropertyGroup>
+</Project>
diff --git a/src/ext/Bal/Cpp.Build.props b/src/ext/Bal/Cpp.Build.props
new file mode 100644
index 00000000..e7bba117
--- /dev/null
+++ b/src/ext/Bal/Cpp.Build.props
@@ -0,0 +1,94 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project>
+  <PropertyGroup>
+    <Platform Condition=" '$(Platform)' == '' OR '$(Platform)' == 'AnyCPU' ">Win32</Platform>
+    <IntDir>$(BaseIntermediateOutputPath)$(Configuration)\$(Platform)\</IntDir>
+    <OutDir>$(OutputPath)$(Platform)\</OutDir>
+
+    <!-- NBGV properties -->
+    <AssemblyCompany>$(Company)</AssemblyCompany>
+    <AssemblyCopyright>$(Copyright)</AssemblyCopyright>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(WindowsTargetPlatformVersion)'=='' AND '$(VisualStudioVersion)'>='15.0'">
+    <WindowsTargetPlatformVersion>$([Microsoft.Build.Utilities.ToolLocationHelper]::GetLatestSDKTargetPlatformVersion('Windows', '10.0'))</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)CustomizedNativeRecommendedRules.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <DisableSpecificWarnings>$(DisableSpecificCompilerWarnings)</DisableSpecificWarnings>
+      <WarningLevel>Level4</WarningLevel>
+      <AdditionalIncludeDirectories>$(ProjectDir)inc;$(MSBuildProjectDirectory);$(IntDir);$(SqlCESdkIncludePath);$(ProjectAdditionalIncludeDirectories);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_WINDOWS;_WIN32_MSI=500;_WIN32_WINNT=0x0501;$(ArmPreprocessorDefinitions);$(UnicodePreprocessorDefinitions);_CRT_STDIO_LEGACY_WIDE_SPECIFIERS;_WINSOCK_DEPRECATED_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>precomp.h</PrecompiledHeaderFile>
+      <CallingConvention Condition="'$(Platform)'=='Win32'">StdCall</CallingConvention>
+      <TreatWarningAsError>true</TreatWarningAsError>
+      <ExceptionHandling>false</ExceptionHandling>
+      <AdditionalOptions>-YlprecompDefine</AdditionalOptions>
+      <AdditionalOptions Condition=" $(PlatformToolset.StartsWith('v14')) ">/Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
+      <MultiProcessorCompilation Condition=" $(NUMBER_OF_PROCESSORS) &gt; 4 ">true</MultiProcessorCompilation>
+    </ClCompile>
+    <ResourceCompile>
+      <PreprocessorDefinitions>$(ArmPreprocessorDefinitions);%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(ProjectAdditionalResourceIncludeDirectories);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ResourceCompile>
+    <Lib>
+      <AdditionalLibraryDirectories>$(OutDir);$(AdditionalMultiTargetLibraryPath);$(ProjectAdditionalLibraryDirectories);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Lib>
+    <Link>
+      <SubSystem>$(ProjectSubSystem)</SubSystem>
+      <ModuleDefinitionFile>$(ProjectModuleDefinitionFile)</ModuleDefinitionFile>
+      <NoEntryPoint>$(ResourceOnlyDll)</NoEntryPoint>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>$(ProjectAdditionalLinkLibraries);advapi32.lib;comdlg32.lib;user32.lib;oleaut32.lib;gdi32.lib;shell32.lib;ole32.lib;version.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalLibraryDirectories>$(OutDir);$(AdditionalMultiTargetLibraryPath);$(ArmLibraryDirectories);$(ProjectAdditionalLinkLibraryDirectories);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalOptions Condition=" $(PlatformToolset.StartsWith('v14')) ">/IGNORE:4099 %(AdditionalOptions)</AdditionalOptions>
+    </Link>
+  </ItemDefinitionGroup>
+
+  <ItemDefinitionGroup Condition=" '$(Platform)'=='Win32' and '$(PlatformToolset)'!='v100'">
+    <ClCompile>
+      <EnableEnhancedInstructionSet>NoExtensions</EnableEnhancedInstructionSet>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition=" '$(Platform)'=='arm' ">
+    <ClCompile>
+      <CallingConvention>CDecl</CallingConvention>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition=" '$(ConfigurationType)'=='StaticLibrary' ">
+    <ClCompile>
+      <DebugInformationFormat>OldStyle</DebugInformationFormat>
+      <OmitDefaultLibName>true</OmitDefaultLibName>
+      <IgnoreAllDefaultLibraries>true</IgnoreAllDefaultLibraries>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition=" '$(Configuration)'=='Debug' ">
+    <ClCompile>
+      <Optimization>Disabled</Optimization>
+      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
+      <PreprocessorDefinitions>_DEBUG;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition=" '$(Configuration)'=='Release' ">
+    <ClCompile>
+      <Optimization>MinSpace</Optimization>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+</Project>
diff --git a/src/ext/Bal/Custom.Build.props b/src/ext/Bal/Custom.Build.props
new file mode 100644
index 00000000..66e74d81
--- /dev/null
+++ b/src/ext/Bal/Custom.Build.props
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition="$(ProjectName.StartsWith('Example.')) And '$(MSBuildProjectExtension)'=='.csproj' ">
+    <OutputPath>$(OutputPath)examples\$(ProjectName)\</OutputPath>
+  </PropertyGroup>
+  <PropertyGroup Condition="$(ProjectName.StartsWith('Example.')) And '$(MSBuildProjectExtension)'=='.vcxproj' ">
+    <OutDir>$(OutDir)examples\$(ProjectName)\</OutDir>
+  </PropertyGroup>
+</Project>
diff --git a/src/ext/Bal/CustomizedNativeRecommendedRules.ruleset b/src/ext/Bal/CustomizedNativeRecommendedRules.ruleset
new file mode 100644
index 00000000..142b141c
--- /dev/null
+++ b/src/ext/Bal/CustomizedNativeRecommendedRules.ruleset
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RuleSet Name="Customized Microsoft Native Recommended Rules" Description="Microsoft Native Recommended Rules, -C26812" ToolsVersion="16.0">
+  <Include Path="nativerecommendedrules.ruleset" Action="Default" />
+  <Rules AnalyzerId="Microsoft.Analyzers.NativeCodeAnalysis" RuleNamespace="Microsoft.Rules.Native">
+    <!-- We need C style enums since we support BAs written in C -->
+    <Rule Id="C26812" Action="None" />
+  </Rules>
+</RuleSet>
\ No newline at end of file
diff --git a/src/ext/Bal/Directory.Build.props b/src/ext/Bal/Directory.Build.props
new file mode 100644
index 00000000..f83cc154
--- /dev/null
+++ b/src/ext/Bal/Directory.Build.props
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<!--
+  Do NOT modify this file. Update the canonical version in Home\repo-template\src\Directory.Build.props
+  then update all of the repos.
+-->
+<Project>
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <EnableSourceLink Condition=" '$(NCrunch)' == '1' ">false</EnableSourceLink>
+    <MSBuildWarningsAsMessages>MSB3246</MSBuildWarningsAsMessages>
+
+    <ProjectName Condition=" '$(ProjectName)' == '' ">$(MSBuildProjectName)</ProjectName>
+    <BaseOutputPath>$([System.IO.Path]::GetFullPath($(MSBuildThisFileDirectory)..\build\))</BaseOutputPath>
+    <BaseIntermediateOutputPath>$(BaseOutputPath)obj\$(ProjectName)\</BaseIntermediateOutputPath>
+    <OutputPath>$(BaseOutputPath)$(Configuration)\</OutputPath>
+
+    <Authors>WiX Toolset Team</Authors>
+    <Company>WiX Toolset</Company>
+    <Copyright>Copyright (c) .NET Foundation and contributors. All rights reserved.</Copyright>
+    <PackageLicenseExpression>MS-RL</PackageLicenseExpression>
+    <Product>WiX Toolset</Product>
+  </PropertyGroup>
+
+  <Import Project="CSharp.Build.props" Condition=" '$(MSBuildProjectExtension)'=='.csproj' and Exists('CSharp.Build.props') " />
+  <Import Project="Cpp.Build.props" Condition=" Exists('Cpp.Build.props') And '$(MSBuildProjectExtension)'=='.vcxproj' " />
+  <Import Project="Wix.Build.props" Condition=" Exists('Wix.Build.props') And '$(MSBuildProjectExtension)'=='.wixproj' " />
+  <Import Project="Custom.Build.props" Condition=" Exists('Custom.Build.props') " />
+</Project>
diff --git a/src/ext/Bal/Directory.Build.targets b/src/ext/Bal/Directory.Build.targets
new file mode 100644
index 00000000..cb988931
--- /dev/null
+++ b/src/ext/Bal/Directory.Build.targets
@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<!--
+  Do NOT modify this file. Update the canonical version in Home\repo-template\src\Directory.Build.targets
+  then update all of the repos.
+-->
+<!--
+  Replace PackageReferences with ProjectReferences when the projects can be found in .sln.
+  See the original here: https://github.com/dotnet/sdk/issues/1151#issuecomment-385133284
+-->
+<Project>
+  <PropertyGroup>
+    <CreateDocumentation Condition=" '$(CreateDocumentationFile)'!='true' ">false</CreateDocumentation>
+    <DocumentationFile Condition=" '$(CreateDocumentationFile)'=='true' ">$(OutputPath)\$(AssemblyName).xml</DocumentationFile>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <ReplacePackageReferences>true</ReplacePackageReferences>
+    <TheSolutionPath Condition=" '$(NCrunch)'=='' ">$(SolutionPath)</TheSolutionPath>
+    <TheSolutionPath Condition=" '$(NCrunch)'=='1' ">$(NCrunchOriginalSolutionPath)</TheSolutionPath>
+  </PropertyGroup>
+
+  <Choose>
+    <When Condition="$(ReplacePackageReferences) AND '$(TheSolutionPath)' != '' AND '$(TheSolutionPath)' != '*undefined*' AND Exists('$(TheSolutionPath)')">
+
+      <PropertyGroup>
+        <SolutionFileContent>$([System.IO.File]::ReadAllText($(TheSolutionPath)))</SolutionFileContent>
+        <SmartSolutionDir>$([System.IO.Path]::GetDirectoryName( $(TheSolutionPath) ))</SmartSolutionDir>
+        <RegexPattern>(?&lt;="[PackageName]", ")(.*)(?=", ")</RegexPattern>
+      </PropertyGroup>
+
+      <ItemGroup>
+        <!-- Keep the identity of the PackageReference -->
+        <SmartPackageReference Include="@(PackageReference)">
+          <PackageName>%(Identity)</PackageName>
+          <InSolution>$(SolutionFileContent.Contains('\%(Identity).csproj'))</InSolution>
+        </SmartPackageReference>
+
+        <!-- Filter them by mapping them to another ItemGroup using the WithMetadataValue item function -->
+        <PackageInSolution Include="@(SmartPackageReference->WithMetadataValue('InSolution', True))">
+          <Pattern>$(RegexPattern.Replace('[PackageName]','%(PackageName)') )</Pattern>
+          <SmartPath>$([System.Text.RegularExpressions.Regex]::Match('$(SolutionFileContent)', '%(Pattern)'))</SmartPath>
+        </PackageInSolution>
+
+        <ProjectReference  Include="@(PackageInSolution->'$(SmartSolutionDir)\%(SmartPath)' )"/>
+
+        <!-- Remove the package references that are now referenced as projects -->
+        <PackageReference Remove="@(PackageInSolution->'%(PackageName)' )"/>
+      </ItemGroup>
+
+    </When>
+  </Choose>
+
+  <Import Project="Wix.Build.targets" Condition=" Exists('Wix.Build.targets') And '$(MSBuildProjectExtension)'=='.wixproj' " />
+  <Import Project="Custom.Build.targets" Condition=" Exists('Custom.Build.targets') " />
+</Project>
diff --git a/src/ext/Bal/README.md b/src/ext/Bal/README.md
new file mode 100644
index 00000000..cc5d9b34
--- /dev/null
+++ b/src/ext/Bal/README.md
@@ -0,0 +1,2 @@
+# Bal.wixext
+WixToolset.Bal.wixext - Bootstrapper Application Layer WiX Toolset Extension 
diff --git a/src/ext/Bal/Samples/bafunctions/Readme.txt b/src/ext/Bal/Samples/bafunctions/Readme.txt
new file mode 100644
index 00000000..517d0d4c
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/Readme.txt
@@ -0,0 +1,85 @@
+
+This is a sample project showing how to create a BA function assembly.
+
+The four interfaces are in the WixSampleBAFunctions.cpp file.
+
+
+Example code:
+~~~~~~~~~~~~~
+
+
+        HRESULT hr = S_OK;
+        HKEY hkKey = NULL;
+        LPWSTR sczValue = NULL;
+        LPWSTR sczFormatedValue = NULL;
+
+
+        //---------------------------------------------------------------------------------------------
+        // Example of BA function failure
+        hr = E_NOTIMPL;
+        BalExitOnFailure(hr, "Test failure.");
+        //---------------------------------------------------------------------------------------------
+
+        //---------------------------------------------------------------------------------------------
+        // Example of setting a variables
+        hr = m_pEngine->SetVariableString(L"Variable1", L"String value");
+        BalExitOnFailure(hr, "Failed to set variable.");
+        hr = m_pEngine->SetVariableNumeric(L"Variable2", 1234);
+        BalExitOnFailure(hr, "Failed to set variable.");
+        //---------------------------------------------------------------------------------------------
+
+        //---------------------------------------------------------------------------------------------
+        // Example of reading burn variable.
+        BalGetStringVariable(L"WixBundleName", &sczValue);
+        BalExitOnFailure(hr, "Failed to get variable.");
+
+        hr = m_pEngine->SetVariableString(L"Variable4", sczValue);
+        BalExitOnFailure(hr, "Failed to set variable.");
+        //---------------------------------------------------------------------------------------------
+
+        ReleaseNullStr(sczValue); // Release string so it can be re-used
+
+        //---------------------------------------------------------------------------------------------
+        // Examples of reading burn variable and formatting it.
+        BalGetStringVariable(L"InstallFolder", &sczValue);
+        BalExitOnFailure(hr, "Failed to get variable.");
+
+        hr = m_pEngine->SetVariableString(L"Variable5", sczValue);
+        BalExitOnFailure(hr, "Failed to set variable.");
+
+        BalFormatString(sczValue, &sczFormatedValue);
+        BalExitOnFailure(hr, "Failed to format variable.");
+
+        hr = m_pEngine->SetVariableString(L"Variable6", sczFormatedValue);
+        BalExitOnFailure(hr, "Failed to set variable.");
+        //---------------------------------------------------------------------------------------------
+
+        ReleaseNullStr(sczValue); // Release string so it can be re-used
+
+        //---------------------------------------------------------------------------------------------
+        // Example of reading 64 bit registry and setting the InstallFolder variable to the value read.
+        hr = RegOpen(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v3.5", KEY_READ | KEY_WOW64_64KEY, &hkKey);
+        BalExitOnFailure(hr, "Failed to open registry key.");
+
+        hr = RegReadString(hkKey, L"InstallPath", &sczValue);
+        BalExitOnFailure(hr, "Failed to read registry value.");
+
+        // Example of function call
+        PathBackslashTerminate(&sczValue);
+
+        hr = m_pEngine->SetVariableString(L"InstallFolder", sczValue);
+        BalExitOnFailure(hr, "Failed to set variable.");
+        //---------------------------------------------------------------------------------------------
+
+        ReleaseNullStr(sczValue); // Release string so it can be re-used
+
+        //---------------------------------------------------------------------------------------------
+        // Example of calling a function that return HRESULT
+        hr = GetFileVersion();
+        BalExitOnFailure(hr, "Failed to get version.");
+        //---------------------------------------------------------------------------------------------
+
+    LExit:
+        ReleaseRegKey(hkKey);
+        ReleaseStr(sczValue);
+        ReleaseStr(sczFormatedValue);
diff --git a/src/ext/Bal/Samples/bafunctions/WixSampleBAFunctions.cpp b/src/ext/Bal/Samples/bafunctions/WixSampleBAFunctions.cpp
new file mode 100644
index 00000000..531b86a3
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/WixSampleBAFunctions.cpp
@@ -0,0 +1,95 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+#include "BalBaseBAFunctions.h"
+#include "BalBaseBAFunctionsProc.h"
+
+class CWixSampleBAFunctions : public CBalBaseBAFunctions
+{
+public: // IBootstrapperApplication
+    virtual STDMETHODIMP OnDetectBegin(
+        __in BOOL fInstalled,
+        __in DWORD cPackages,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Running detect begin BA function. fInstalled=%d, cPackages=%u, fCancel=%d", fInstalled, cPackages, *pfCancel);
+
+        //-------------------------------------------------------------------------------------------------
+        // YOUR CODE GOES HERE
+        BalExitOnFailure(hr, "Change this message to represent real error handling.");
+        //-------------------------------------------------------------------------------------------------
+
+    LExit:
+        return hr;
+    }
+
+public: // IBAFunctions
+    virtual STDMETHODIMP OnPlanBegin(
+        __in DWORD cPackages,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Running plan begin BA function. cPackages=%u, fCancel=%d", cPackages, *pfCancel);
+
+        //-------------------------------------------------------------------------------------------------
+        // YOUR CODE GOES HERE
+        BalExitOnFailure(hr, "Change this message to represent real error handling.");
+        //-------------------------------------------------------------------------------------------------
+
+    LExit:
+        return hr;
+    }
+
+public:
+    //
+    // Constructor - initialize member variables.
+    //
+    CWixSampleBAFunctions(
+        __in HMODULE hModule,
+        __in IBootstrapperEngine* pEngine,
+        __in const BA_FUNCTIONS_CREATE_ARGS* pArgs
+        ) : CBalBaseBAFunctions(hModule, pEngine, pArgs)
+    {
+    }
+
+    //
+    // Destructor - release member variables.
+    //
+    ~CWixSampleBAFunctions()
+    {
+    }
+};
+
+
+HRESULT WINAPI CreateBAFunctions(
+    __in HMODULE hModule,
+    __in const BA_FUNCTIONS_CREATE_ARGS* pArgs,
+    __inout BA_FUNCTIONS_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    CWixSampleBAFunctions* pBAFunctions = NULL;
+    IBootstrapperEngine* pEngine = NULL;
+
+    // This is required to enable logging functions.
+    hr = BalInitializeFromCreateArgs(pArgs->pBootstrapperCreateArgs, &pEngine);
+    ExitOnFailure(hr, "Failed to initialize Bal.");
+
+    pBAFunctions = new CWixSampleBAFunctions(hModule, pEngine, pArgs);
+    ExitOnNull(pBAFunctions, hr, E_OUTOFMEMORY, "Failed to create new CWixSampleBAFunctions object.");
+
+    pResults->pfnBAFunctionsProc = BalBaseBAFunctionsProc;
+    pResults->pvBAFunctionsProcContext = pBAFunctions;
+    pBAFunctions = NULL;
+
+LExit:
+    ReleaseObject(pBAFunctions);
+    ReleaseObject(pEngine);
+
+    return hr;
+}
diff --git a/src/ext/Bal/Samples/bafunctions/bafunctions.cpp b/src/ext/Bal/Samples/bafunctions/bafunctions.cpp
new file mode 100644
index 00000000..b20f4230
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/bafunctions.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+static HINSTANCE vhInstance = NULL;
+
+extern "C" BOOL WINAPI DllMain(
+    IN HINSTANCE hInstance,
+    IN DWORD dwReason,
+    IN LPVOID /* pvReserved */
+    )
+{
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+        ::DisableThreadLibraryCalls(hInstance);
+        vhInstance = hInstance;
+        break;
+
+    case DLL_PROCESS_DETACH:
+        vhInstance = NULL;
+        break;
+    }
+
+    return TRUE;
+}
+
+extern "C" HRESULT WINAPI BAFunctionsCreate(
+    __in const BA_FUNCTIONS_CREATE_ARGS* pArgs,
+    __inout BA_FUNCTIONS_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    
+    hr = CreateBAFunctions(vhInstance, pArgs, pResults);
+    BalExitOnFailure(hr, "Failed to create BAFunctions interface.");
+
+LExit:
+    return hr;
+}
+
+extern "C" void WINAPI BAFunctionsDestroy(
+    )
+{
+    BalUninitialize();
+}
diff --git a/src/ext/Bal/Samples/bafunctions/bafunctions.def b/src/ext/Bal/Samples/bafunctions/bafunctions.def
new file mode 100644
index 00000000..6e016dad
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/bafunctions.def
@@ -0,0 +1,6 @@
+; Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+EXPORTS
+    BAFunctionsCreate
+    BAFunctionsDestroy
diff --git a/src/ext/Bal/Samples/bafunctions/bafunctions.vcxproj b/src/ext/Bal/Samples/bafunctions/bafunctions.vcxproj
new file mode 100644
index 00000000..640c812d
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/bafunctions.vcxproj
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props" Condition="Exists('..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" />
+  <Import Project="..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props" Condition="Exists('..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" />
+  <Import Project="..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props" Condition="Exists('..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" />
+
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{EB0A7D51-2133-4EE7-B6CA-87DBEAC67E02}</ProjectGuid>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <TargetName>BAFunctions</TargetName>
+    <ProjectModuleDefinitionFile>bafunctions.def</ProjectModuleDefinitionFile>
+  </PropertyGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+
+  <PropertyGroup>
+    <ProjectAdditionalLinkLibraries>comctl32.lib;gdiplus.lib;msimg32.lib;shlwapi.lib;wininet.lib</ProjectAdditionalLinkLibraries>
+  </PropertyGroup>
+  <ItemGroup>
+    <ClCompile Include="WixSampleBAFunctions.cpp" />
+    <ClCompile Include="bafunctions.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="precomp.h" />
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="bafunctions.def" />
+    <None Include="Readme.txt" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Import Project="..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props'))" />
+    <Error Condition="!Exists('..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props'))" />
+    <Error Condition="!Exists('..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props'))" />
+    <Error Condition="!Exists('..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets'))" />
+  </Target>
+</Project>
diff --git a/src/ext/Bal/Samples/bafunctions/packages.config b/src/ext/Bal/Samples/bafunctions/packages.config
new file mode 100644
index 00000000..548ddb48
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/packages.config
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Nerdbank.GitVersioning" version="3.3.37" targetFramework="native" developmentDependency="true" />
+  <package id="WixToolset.BootstrapperCore.Native" version="4.0.141" targetFramework="native" />
+  <package id="WixToolset.BalUtil" version="4.0.58" targetFramework="native" />
+  <package id="WixToolset.DUtil" version="4.0.72" targetFramework="native" />
+</packages>
\ No newline at end of file
diff --git a/src/ext/Bal/Samples/bafunctions/precomp.h b/src/ext/Bal/Samples/bafunctions/precomp.h
new file mode 100644
index 00000000..9d2fe726
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/precomp.h
@@ -0,0 +1,52 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+#include <windows.h>
+
+#pragma warning(push)
+#pragma warning(disable:4458) // declaration of 'xxx' hides class member
+#include <gdiplus.h>
+#pragma warning(pop)
+
+#include <msiquery.h>
+#include <objbase.h>
+#include <shlobj.h>
+#include <shlwapi.h>
+#include <stdlib.h>
+#include <strsafe.h>
+#include <CommCtrl.h>
+
+// Standard WiX header files, include as required
+#include "dutil.h"
+//#include "memutil.h"
+//#include "dictutil.h"
+//#include "dirutil.h"
+#include "fileutil.h"
+#include "locutil.h"
+//#include "logutil.h"
+#include "pathutil.h"
+//#include "resrutil.h"
+//#include "shelutil.h"
+#include "strutil.h"
+#include "thmutil.h"
+//#include "uriutil.h"
+//#include "xmlutil.h"
+#include "regutil.h"
+
+//#include "IBootstrapperEngine.h"
+//#include "IBootstrapperApplication.h"
+
+#include "BalBaseBootstrapperApplication.h"
+//#include "balinfo.h"
+//#include "balcondition.h"
+#include "balutil.h"
+
+#include "BAFunctions.h"
+#include "IBAFunctions.h"
+
+HRESULT WINAPI CreateBAFunctions(
+    __in HMODULE hModule,
+    __in const BA_FUNCTIONS_CREATE_ARGS* pArgs,
+    __inout BA_FUNCTIONS_CREATE_RESULTS* pResults
+    );
diff --git a/src/ext/Bal/Samples/bafunctions/resource.h b/src/ext/Bal/Samples/bafunctions/resource.h
new file mode 100644
index 00000000..149a8ff4
--- /dev/null
+++ b/src/ext/Bal/Samples/bafunctions/resource.h
@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#define IDC_STATIC                      -1
+
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1003
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/BootstrapperApplicationFactory.cs b/src/ext/Bal/WixToolset.Dnc.Host/BootstrapperApplicationFactory.cs
new file mode 100644
index 00000000..d38fd1a9
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/BootstrapperApplicationFactory.cs
@@ -0,0 +1,89 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dnc.Host
+{
+    using System;
+    using System.Linq;
+    using System.Reflection;
+    using System.Runtime.InteropServices;
+
+    delegate IBootstrapperApplicationFactory StaticEntryDelegate([MarshalAs(UnmanagedType.LPWStr)] string baFactoryAssemblyName, [MarshalAs(UnmanagedType.LPWStr)] string baFactoryAssemblyPath);
+
+    /// <summary>
+    /// Entry point for the .NET Core host to create and return the BA to the engine.
+    /// Reflection is used instead of referencing WixToolset.Mba.Core directly to avoid requiring it in the AssemblyLoadContext.
+    /// </summary>
+    public sealed class BootstrapperApplicationFactory : IBootstrapperApplicationFactory
+    {
+        private string baFactoryAssemblyName;
+        private string baFactoryAssemblyPath;
+
+        public BootstrapperApplicationFactory(string baFactoryAssemblyName, string baFactoryAssemblyPath)
+        {
+            this.baFactoryAssemblyName = baFactoryAssemblyName;
+            this.baFactoryAssemblyPath = baFactoryAssemblyPath;
+        }
+
+        /// <summary>
+        /// Loads the bootstrapper application assembly and calls its IBootstrapperApplicationFactory.Create method.
+        /// </summary>
+        /// <param name="pArgs">Pointer to BOOTSTRAPPER_CREATE_ARGS struct.</param>
+        /// <param name="pResults">Pointer to BOOTSTRAPPER_CREATE_RESULTS struct.</param>
+        /// <exception cref="MissingAttributeException">The bootstrapper application assembly
+        /// does not define the <see cref="BootstrapperApplicationFactoryAttribute"/>.</exception>
+        public void Create(IntPtr pArgs, IntPtr pResults)
+        {
+            // Load the BA's IBootstrapperApplicationFactory.
+            var baFactoryType = BootstrapperApplicationFactory.GetBAFactoryTypeFromAssembly(this.baFactoryAssemblyName, this.baFactoryAssemblyPath);
+            var baFactory = Activator.CreateInstance(baFactoryType);
+            if (null == baFactory)
+            {
+                throw new InvalidBootstrapperApplicationFactoryException();
+            }
+
+            var createMethod = baFactoryType.GetMethod(nameof(Create), new[] { typeof(IntPtr), typeof(IntPtr) });
+            if (null == createMethod)
+            {
+                throw new InvalidBootstrapperApplicationFactoryException();
+            }
+            createMethod.Invoke(baFactory, new object[] { pArgs, pResults });
+        }
+
+        /// <summary>
+        /// Locates the <see cref="BootstrapperApplicationFactoryAttribute"/> and returns the specified type.
+        /// </summary>
+        /// <param name="assemblyName">The assembly that defines the IBootstrapperApplicationFactory implementation.</param>
+        /// <returns>The bootstrapper application factory <see cref="Type"/>.</returns>
+        private static Type GetBAFactoryTypeFromAssembly(string assemblyName, string assemblyPath)
+        {
+            // The default ALC shouldn't need help loading the assembly, since the host should have provided the deps.json
+            // when starting the runtime. But it doesn't hurt so keep this in case an isolated ALC is ever needed.
+            var alc = new DnchostAssemblyLoadContext(assemblyPath, false);
+            var asm = alc.LoadFromAssemblyName(new AssemblyName(assemblyName));
+
+            var attr = asm.GetCustomAttributes()
+                          .Where(a => a.GetType().FullName == "WixToolset.Mba.Core.BootstrapperApplicationFactoryAttribute")
+                          .SingleOrDefault();
+
+            if (null == attr)
+            {
+                throw new MissingAttributeException();
+            }
+
+            var baFactoryTypeProperty = attr.GetType().GetProperty("BootstrapperApplicationFactoryType", typeof(Type));
+            if (baFactoryTypeProperty == null || baFactoryTypeProperty.GetMethod == null)
+            {
+                throw new MissingAttributeException();
+            }
+
+            var baFactoryType = (Type)baFactoryTypeProperty.GetMethod.Invoke(attr, null);
+            return baFactoryType;
+        }
+
+        // Entry point for the DNC host.
+        public static IBootstrapperApplicationFactory CreateBAFactory([MarshalAs(UnmanagedType.LPWStr)] string baFactoryAssemblyName, [MarshalAs(UnmanagedType.LPWStr)] string baFactoryAssemblyPath)
+        {
+            return new BootstrapperApplicationFactory(baFactoryAssemblyName, baFactoryAssemblyPath);
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/DnchostAssemblyLoadContext.cs b/src/ext/Bal/WixToolset.Dnc.Host/DnchostAssemblyLoadContext.cs
new file mode 100644
index 00000000..1a383058
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/DnchostAssemblyLoadContext.cs
@@ -0,0 +1,58 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dnc.Host
+{
+    using System;
+    using System.Reflection;
+    using System.Runtime.Loader;
+
+    public sealed class DnchostAssemblyLoadContext : AssemblyLoadContext
+    {
+        private readonly AssemblyDependencyResolver resolver;
+
+        public DnchostAssemblyLoadContext(string assemblyPath, bool isolateFromDefault)
+            : base(nameof(DnchostAssemblyLoadContext), isolateFromDefault)
+        {
+            this.resolver = new AssemblyDependencyResolver(assemblyPath);
+
+            if (!this.IsCollectible)
+            {
+                AssemblyLoadContext.Default.Resolving += this.ResolveAssembly;
+                AssemblyLoadContext.Default.ResolvingUnmanagedDll += this.ResolveUnmanagedDll;
+            }
+        }
+
+        private Assembly ResolveAssembly(AssemblyLoadContext defaultAlc, AssemblyName assemblyName)
+        {
+            var path = this.resolver.ResolveAssemblyToPath(assemblyName);
+            if (path != null)
+            {
+                var targetAlc = this.IsCollectible ? this : defaultAlc;
+                return targetAlc.LoadFromAssemblyPath(path);
+            }
+
+            return null;
+        }
+
+        private IntPtr ResolveUnmanagedDll(Assembly assembly, string unmanagedDllName)
+        {
+            var path = this.resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
+            if (path != null)
+            {
+                return this.LoadUnmanagedDllFromPath(path);
+            }
+
+            return IntPtr.Zero;
+        }
+
+        protected override Assembly Load(AssemblyName assemblyName)
+        {
+            return this.ResolveAssembly(AssemblyLoadContext.Default, assemblyName);
+        }
+
+        protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
+        {
+            return this.ResolveUnmanagedDll(null, unmanagedDllName);
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/Exceptions.cs b/src/ext/Bal/WixToolset.Dnc.Host/Exceptions.cs
new file mode 100644
index 00000000..32d4d4c5
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/Exceptions.cs
@@ -0,0 +1,145 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dnc.Host
+{
+    using System;
+    using System.Runtime.Serialization;
+
+    /// <summary>
+    /// Base class for exception returned to the bootstrapper application host.
+    /// </summary>
+    [Serializable]
+    public abstract class BootstrapperException : Exception
+    {
+        /// <summary>
+        /// Creates an instance of the <see cref="BootstrapperException"/> base class with the given HRESULT.
+        /// </summary>
+        /// <param name="hr">The HRESULT for the exception that is used by the bootstrapper application host.</param>
+        public BootstrapperException(int hr)
+        {
+            this.HResult = hr;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public BootstrapperException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public BootstrapperException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected BootstrapperException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    /// <summary>
+    /// The bootstrapper application assembly loaded by the host does not contain exactly one instance of the
+    /// <see cref="Core.BootstrapperApplicationFactoryAttribute"/> class.
+    /// </summary>
+    /// <seealso cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    [Serializable]
+    public class MissingAttributeException : BootstrapperException
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        public MissingAttributeException()
+            : base(NativeMethods.E_NOTFOUND)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public MissingAttributeException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public MissingAttributeException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected MissingAttributeException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    /// <summary>
+    /// The bootstrapper application factory specified by the <see cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    ///  does not extend the <see cref="Core.IBootstrapperApplicationFactory"/> base class.
+    /// </summary>
+    /// <seealso cref="Core.BaseBootstrapperApplicationFactory"/>
+    /// <seealso cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    [Serializable]
+    public class InvalidBootstrapperApplicationFactoryException : BootstrapperException
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        public InvalidBootstrapperApplicationFactoryException()
+            : base(NativeMethods.E_UNEXPECTED)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public InvalidBootstrapperApplicationFactoryException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public InvalidBootstrapperApplicationFactoryException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected InvalidBootstrapperApplicationFactoryException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/IBootstrapperApplicationFactory.cs b/src/ext/Bal/WixToolset.Dnc.Host/IBootstrapperApplicationFactory.cs
new file mode 100644
index 00000000..96731192
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/IBootstrapperApplicationFactory.cs
@@ -0,0 +1,16 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dnc.Host
+{
+    using System;
+    using System.Runtime.InteropServices;
+
+    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    public interface IBootstrapperApplicationFactory
+    {
+        void Create(
+            IntPtr pArgs,
+            IntPtr pResults
+            );
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/NativeMethods.cs b/src/ext/Bal/WixToolset.Dnc.Host/NativeMethods.cs
new file mode 100644
index 00000000..6dc393c6
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/NativeMethods.cs
@@ -0,0 +1,18 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Dnc.Host
+{
+    using System;
+    using System.Runtime.InteropServices;
+
+    /// <summary>
+    /// Contains native constants, functions, and structures for this assembly.
+    /// </summary>
+    internal static class NativeMethods
+    {
+        #region Error Constants
+        internal const int E_NOTFOUND = unchecked((int)0x80070490);
+        internal const int E_UNEXPECTED = unchecked((int)0x8000ffff);
+        #endregion
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Dnc.Host/WixToolset.Dnc.Host.csproj b/src/ext/Bal/WixToolset.Dnc.Host/WixToolset.Dnc.Host.csproj
new file mode 100644
index 00000000..f347ca0b
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Dnc.Host/WixToolset.Dnc.Host.csproj
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>WixToolset.Dnc.Host</RootNamespace>
+    <Description>WiX Toolset .NET Core BA Host</Description>
+    <Title>WiX Toolset .NET Core BA Host</Title>
+    <DebugType>embedded</DebugType>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <HeaderPath Include="$(BaseOutputPath)obj\$(AssemblyName).h">
+      <Visible>False</Visible>
+    </HeaderPath>
+  </ItemGroup>
+
+  <Target Name="GenerateIdentityHeader" AfterTargets="Build" Inputs="$(TargetPath)" Outputs="@(HeaderPath)">
+    <GetAssemblyIdentity AssemblyFiles="$(TargetPath)">
+      <Output TaskParameter="Assemblies" ItemName="AssemblyIdentity" />
+    </GetAssemblyIdentity>
+    <ItemGroup>
+      <Line Include='#define DNC_ASSEMBLY_FILE_NAME L"$(AssemblyName).dll"' />
+      <Line Include='#define DNC_ASSEMBLY_FULL_NAME "%(AssemblyIdentity.Identity)"' />
+      <Line Include='#define DNC_ENTRY_TYPE "$(RootNamespace).BootstrapperApplicationFactory"' />
+      <Line Include='#define DNC_ENTRY_TYPEW L"$(RootNamespace).BootstrapperApplicationFactory,$(AssemblyName)"' />
+      <Line Include='#define DNC_STATIC_ENTRY_METHOD "CreateBAFactory"' />
+      <Line Include='#define DNC_STATIC_ENTRY_METHODW L"CreateBAFactory"' />
+      <Line Include='#define DNC_STATIC_ENTRY_DELEGATEW L"$(RootNamespace).StaticEntryDelegate,$(AssemblyName)"' />
+    </ItemGroup>
+    <Message Importance="normal" Text="Generating identity definitions into @(HeaderPath->'%(FullPath)')" />
+    <WriteLinesToFile File="@(HeaderPath)" Lines="@(Line)" Overwrite="True" />
+    <ItemGroup>
+      <FileWrites Include="@(HeaderPath)" />
+    </ItemGroup>
+  </Target>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+  </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/WixToolset.Mba.Host/BootstrapperApplicationFactory.cs b/src/ext/Bal/WixToolset.Mba.Host/BootstrapperApplicationFactory.cs
new file mode 100644
index 00000000..78e68bd9
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/BootstrapperApplicationFactory.cs
@@ -0,0 +1,86 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Configuration;
+    using System.Reflection;
+    using System.Runtime.InteropServices;
+    using WixToolset.Mba.Core;
+
+    /// <summary>
+    /// Entry point for the managed host to create and return the BA to the engine.
+    /// </summary>
+    [ClassInterface(ClassInterfaceType.None)]
+    public sealed class BootstrapperApplicationFactory : MarshalByRefObject, IBootstrapperApplicationFactory
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="BootstrapperApplicationFactory"/> class.
+        /// Entry point for the MBA host.
+        /// </summary>
+        public BootstrapperApplicationFactory()
+        {
+        }
+
+        /// <summary>
+        /// Loads the bootstrapper application assembly and calls its IBootstrapperApplicationFactory.Create method.
+        /// </summary>
+        /// <param name="pArgs">Pointer to BOOTSTRAPPER_CREATE_ARGS struct.</param>
+        /// <param name="pResults">Pointer to BOOTSTRAPPER_CREATE_RESULTS struct.</param>
+        /// <exception cref="MissingAttributeException">The bootstrapper application assembly
+        /// does not define the <see cref="BootstrapperApplicationFactoryAttribute"/>.</exception>
+        public void Create(IntPtr pArgs, IntPtr pResults)
+        {
+            // Get the wix.boostrapper section group to get the name of the bootstrapper application assembly to host.
+            var section = ConfigurationManager.GetSection("wix.bootstrapper/host") as HostSection;
+            if (null == section)
+            {
+                throw new MissingAttributeException(); // TODO: throw a more specific exception than this.
+            }
+
+            // Load the BA's IBootstrapperApplicationFactory.
+            var baFactoryType = BootstrapperApplicationFactory.GetBAFactoryTypeFromAssembly(section.AssemblyName);
+            var baFactory = (IBootstrapperApplicationFactory)Activator.CreateInstance(baFactoryType);
+            if (null == baFactory)
+            {
+                throw new InvalidBootstrapperApplicationFactoryException();
+            }
+
+            baFactory.Create(pArgs, pResults);
+        }
+
+        /// <summary>
+        /// Locates the <see cref="BootstrapperApplicationFactoryAttribute"/> and returns the specified type.
+        /// </summary>
+        /// <param name="assemblyName">The assembly that defines the IBootstrapperApplicationFactory implementation.</param>
+        /// <returns>The bootstrapper application factory <see cref="Type"/>.</returns>
+        private static Type GetBAFactoryTypeFromAssembly(string assemblyName)
+        {
+            Type baFactoryType = null;
+
+            // Load the requested assembly.
+            Assembly asm = AppDomain.CurrentDomain.Load(assemblyName);
+
+            // If an assembly was loaded and is not the current assembly, check for the required attribute.
+            // This is done to avoid using the BootstrapperApplicationFactoryAttribute which we use at build time
+            // to specify the BootstrapperApplicationFactory assembly in the manifest.
+            if (!Assembly.GetExecutingAssembly().Equals(asm))
+            {
+                // There must be one and only one BootstrapperApplicationFactoryAttribute.
+                // The attribute prevents multiple declarations already.
+                var attrs = (BootstrapperApplicationFactoryAttribute[])asm.GetCustomAttributes(typeof(BootstrapperApplicationFactoryAttribute), false);
+                if (null != attrs)
+                {
+                    baFactoryType = attrs[0].BootstrapperApplicationFactoryType;
+                }
+            }
+
+            if (null == baFactoryType)
+            {
+                throw new MissingAttributeException();
+            }
+
+            return baFactoryType;
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/BootstrapperSectionGroup.cs b/src/ext/Bal/WixToolset.Mba.Host/BootstrapperSectionGroup.cs
new file mode 100644
index 00000000..5cf1bc9c
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/BootstrapperSectionGroup.cs
@@ -0,0 +1,29 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Configuration;
+
+    /// <summary>
+    /// Handler for the wix.bootstrapper configuration section group.
+    /// </summary>
+    public class BootstrapperSectionGroup : ConfigurationSectionGroup
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="BootstrapperSectionGroup"/> class.
+        /// </summary>
+        public BootstrapperSectionGroup()
+        {
+        }
+
+        /// <summary>
+        /// Gets the <see cref="HostSection"/> handler for the mba configuration section.
+        /// </summary>
+        [ConfigurationProperty("host")]
+        public HostSection Host
+        {
+            get { return (HostSection)base.Sections["host"]; }
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/Exceptions.cs b/src/ext/Bal/WixToolset.Mba.Host/Exceptions.cs
new file mode 100644
index 00000000..c68951f0
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/Exceptions.cs
@@ -0,0 +1,145 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Runtime.Serialization;
+
+    /// <summary>
+    /// Base class for exception returned to the bootstrapper application host.
+    /// </summary>
+    [Serializable]
+    public abstract class BootstrapperException : Exception
+    {
+        /// <summary>
+        /// Creates an instance of the <see cref="BootstrapperException"/> base class with the given HRESULT.
+        /// </summary>
+        /// <param name="hr">The HRESULT for the exception that is used by the bootstrapper application host.</param>
+        public BootstrapperException(int hr)
+        {
+            this.HResult = hr;
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public BootstrapperException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public BootstrapperException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BootstrapperException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected BootstrapperException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    /// <summary>
+    /// The bootstrapper application assembly loaded by the host does not contain exactly one instance of the
+    /// <see cref="Core.BootstrapperApplicationFactoryAttribute"/> class.
+    /// </summary>
+    /// <seealso cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    [Serializable]
+    public class MissingAttributeException : BootstrapperException
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        public MissingAttributeException()
+            : base(NativeMethods.E_NOTFOUND)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public MissingAttributeException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public MissingAttributeException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MissingAttributeException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected MissingAttributeException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    /// <summary>
+    /// The bootstrapper application factory specified by the <see cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    ///  does not extend the <see cref="Core.IBootstrapperApplicationFactory"/> base class.
+    /// </summary>
+    /// <seealso cref="Core.BaseBootstrapperApplicationFactory"/>
+    /// <seealso cref="Core.BootstrapperApplicationFactoryAttribute"/>
+    [Serializable]
+    public class InvalidBootstrapperApplicationFactoryException : BootstrapperException
+    {
+        /// <summary>
+        /// Creates a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        public InvalidBootstrapperApplicationFactoryException()
+            : base(NativeMethods.E_UNEXPECTED)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message.</param>
+        public InvalidBootstrapperApplicationFactoryException(string message)
+            : base(message)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="message">Exception message</param>
+        /// <param name="innerException">Inner exception associated with this one</param>
+        public InvalidBootstrapperApplicationFactoryException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="InvalidBootstrapperApplicationFactoryException"/> class.
+        /// </summary>
+        /// <param name="info">Serialization information for this exception</param>
+        /// <param name="context">Streaming context to serialize to</param>
+        protected InvalidBootstrapperApplicationFactoryException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/HostSection.cs b/src/ext/Bal/WixToolset.Mba.Host/HostSection.cs
new file mode 100644
index 00000000..632025c7
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/HostSection.cs
@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Configuration;
+
+    /// <summary>
+    /// Handler for the Host configuration section.
+    /// </summary>
+    public sealed class HostSection : ConfigurationSection
+    {
+        private static readonly ConfigurationProperty assemblyNameProperty = new ConfigurationProperty("assemblyName", typeof(string), null, ConfigurationPropertyOptions.IsRequired);
+        private static readonly ConfigurationProperty supportedFrameworksProperty = new ConfigurationProperty("", typeof(SupportedFrameworkElementCollection), null, ConfigurationPropertyOptions.IsDefaultCollection);
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="HostSection"/> class.
+        /// </summary>
+        public HostSection()
+        {
+        }
+
+        /// <summary>
+        /// Gets the name of the assembly that contians the <see cref="Core.IBootstrapperApplicationFactory"/> child class.
+        /// </summary>
+        /// <remarks>
+        /// The assembly specified by this name must contain the <see cref="Core.BootstrapperApplicationFactoryAttribute"/> to identify
+        /// the type of the <see cref="Core.IBootstrapperApplicationFactory"/> child class.
+        /// </remarks>
+        [ConfigurationProperty("assemblyName", IsRequired = true)]
+        public string AssemblyName
+        {
+            get { return (string)base[assemblyNameProperty]; }
+            set { base[assemblyNameProperty] = value; }
+        }
+
+        /// <summary>
+        /// Gets the <see cref="SupportedFrameworkElementCollection"/> of supported frameworks for the host configuration.
+        /// </summary>
+        [ConfigurationProperty("", IsDefaultCollection = true)]
+        [ConfigurationCollection(typeof(SupportedFrameworkElement))]
+        public SupportedFrameworkElementCollection SupportedFrameworks
+        {
+            get { return (SupportedFrameworkElementCollection)base[supportedFrameworksProperty]; }
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/NativeMethods.cs b/src/ext/Bal/WixToolset.Mba.Host/NativeMethods.cs
new file mode 100644
index 00000000..b9fc85a0
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/NativeMethods.cs
@@ -0,0 +1,18 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Runtime.InteropServices;
+
+    /// <summary>
+    /// Contains native constants, functions, and structures for this assembly.
+    /// </summary>
+    internal static class NativeMethods
+    {
+        #region Error Constants
+        internal const int E_NOTFOUND = unchecked((int)0x80070490);
+        internal const int E_UNEXPECTED = unchecked((int)0x8000ffff);
+        #endregion
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElement.cs b/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElement.cs
new file mode 100644
index 00000000..fe7fd2eb
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElement.cs
@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Configuration;
+
+    /// <summary>
+    /// Handler for the supportedFramework configuration section.
+    /// </summary>
+    public sealed class SupportedFrameworkElement : ConfigurationElement
+    {
+        private static readonly ConfigurationProperty versionProperty = new ConfigurationProperty("version", typeof(string), null, ConfigurationPropertyOptions.IsRequired);
+        private static readonly ConfigurationProperty runtimeVersionProperty = new ConfigurationProperty("runtimeVersion", typeof(string));
+
+        /// <summary>
+        /// Creates a new instance of the <see cref="SupportedFrameworkElement"/> class.
+        /// </summary>
+        public SupportedFrameworkElement()
+        {
+        }
+
+        /// <summary>
+        /// Gets the version of the supported framework.
+        /// </summary>
+        /// <remarks>
+        /// The assembly specified by this name must contain a value matching the NETFX version registry key under
+        /// "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP".
+        /// </remarks>
+        [ConfigurationProperty("version", IsRequired = true)]
+        public string Version
+        {
+            get { return (string)base[versionProperty]; }
+            set { base[versionProperty] = value; }
+        }
+
+        /// <summary>
+        /// Gets the runtime version required by this supported framework.
+        /// </summary>
+        [ConfigurationProperty("runtimeVersion", IsRequired = false)]
+        public string RuntimeVersion
+        {
+            get { return (string)base[runtimeVersionProperty]; }
+            set { base[runtimeVersionProperty] = value; }
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElementCollection.cs b/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElementCollection.cs
new file mode 100644
index 00000000..12c7cf3e
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/SupportedFrameworkElementCollection.cs
@@ -0,0 +1,36 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Mba.Host
+{
+    using System;
+    using System.Configuration;
+    using System.Diagnostics.CodeAnalysis;
+
+    /// <summary>
+    /// Handler for the supportedFramework collection.
+    /// </summary>
+    [SuppressMessage("Microsoft.Design", "CA1010:CollectionsShouldImplementGenericInterface")]
+    [ConfigurationCollection(typeof(SupportedFrameworkElement), AddItemName = "supportedFramework", CollectionType = ConfigurationElementCollectionType.BasicMap)]
+    public sealed class SupportedFrameworkElementCollection : ConfigurationElementCollection
+    {
+        public override ConfigurationElementCollectionType CollectionType
+        {
+            get { return ConfigurationElementCollectionType.BasicMap; }
+        }
+
+        protected override string ElementName
+        {
+            get { return "supportedFramework"; }
+        }
+
+        protected override ConfigurationElement CreateNewElement()
+        {
+            return new SupportedFrameworkElement();
+        }
+
+        protected override object GetElementKey(ConfigurationElement element)
+        {
+            return (element as SupportedFrameworkElement).Version;
+        }
+    }
+}
diff --git a/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.config b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.config
new file mode 100644
index 00000000..a19b66f1
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.config
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<configuration>
+    <configSections>
+        <sectionGroup name="wix.bootstrapper" type="WixToolset.Mba.Host.BootstrapperSectionGroup, WixToolset.Mba.Host">
+            <section name="host" type="WixToolset.Mba.Host.HostSection, WixToolset.Mba.Host" />
+        </sectionGroup>
+    </configSections>
+    <startup useLegacyV2RuntimeActivationPolicy="true">
+        <supportedRuntime version="v4.0" />
+        <supportedRuntime version="v2.0.50727" />
+    </startup>
+    <wix.bootstrapper>
+        <!-- Example only. Use only if the startup/supportedRuntime above cannot discern supported frameworks. -->
+        <!--
+        <supportedFramework version="v4\Client" />
+        <supportedFramework version="v3.5" />
+        <supportedFramework version="v3.0" />
+        -->
+
+        <!-- Example only. Replace the host/@assemblyName attribute with assembly that implements IBootstrapperApplicationFactory. -->
+        <host assemblyName="AssemblyWithClassThatInheritsFromBootstrapperApplicationFactory" />
+    </wix.bootstrapper>
+</configuration>
diff --git a/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.csproj b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.csproj
new file mode 100644
index 00000000..3ee0ad1e
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.csproj
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <AssemblyName>WixToolset.Mba.Host</AssemblyName>
+    <RootNamespace>WixToolset.Mba.Host</RootNamespace>
+    <TargetFrameworks>net20</TargetFrameworks>
+    <Description>Managed Bootstrapper Application entry point</Description>
+    <DebugType>embedded</DebugType>
+    <NuspecFile>$(MSBuildThisFileName).nuspec</NuspecFile>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="WixToolset.Mba.Host.config" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="All" />
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System.Configuration" />
+  </ItemGroup>
+  <ItemGroup>
+    <HeaderPath Include="$(BaseOutputPath)obj\$(AssemblyName).h">
+      <Visible>False</Visible>
+    </HeaderPath>
+  </ItemGroup>
+
+  <Target Name="GenerateIdentityHeader" AfterTargets="Build" Inputs="$(TargetPath)" Outputs="@(HeaderPath)">
+    <GetAssemblyIdentity AssemblyFiles="$(TargetPath)">
+      <Output TaskParameter="Assemblies" ItemName="AssemblyIdentity" />
+    </GetAssemblyIdentity>
+    <ItemGroup>
+      <Line Include='#define MBA_ASSEMBLY_FULL_NAME L"%(AssemblyIdentity.Identity)"' />
+      <Line Include='#define MBA_CONFIG_FILE_NAME L"$(AssemblyName).config"' />
+      <Line Include='#define MBA_ENTRY_TYPE L"$(RootNamespace).BootstrapperApplicationFactory"' />
+    </ItemGroup>
+    <Message Importance="normal" Text="Generating identity definitions into @(HeaderPath->'%(FullPath)')" />
+    <WriteLinesToFile File="@(HeaderPath)" Lines="@(Line)" Overwrite="True" />
+    <ItemGroup>
+      <FileWrites Include="@(HeaderPath)" />
+    </ItemGroup>
+  </Target>
+
+  <Target Name="SetNuspecProperties" DependsOnTargets="InitializeSourceControlInformation" AfterTargets="GetBuildVersion">
+    <PropertyGroup>
+      <NuspecBasePath>$(OutputPath)</NuspecBasePath>
+      <NuspecProperties>Id=$(AssemblyName);Version=$(BuildVersionSimple);Authors=$(Authors);Copyright=$(Copyright);Description=$(Description);RepositoryCommit=$(SourceRevisionId);RepositoryType=$(RepositoryType);RepositoryUrl=$(PrivateRepositoryUrl)</NuspecProperties>
+    </PropertyGroup>
+  </Target>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.nuspec b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.nuspec
new file mode 100644
index 00000000..00fd21ac
--- /dev/null
+++ b/src/ext/Bal/WixToolset.Mba.Host/WixToolset.Mba.Host.nuspec
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<package >
+  <metadata>
+    <id>$id$</id>
+    <version>$version$</version>
+    <authors>WiX Toolset Team</authors>
+    <owners>WiX Toolset Team</owners>
+    <license type="expression">MS-RL</license>
+    <projectUrl>https://github.com/wixtoolset/Bal.wixext</projectUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <description>$description$</description>
+    <copyright>$copyright$</copyright>
+    <repository type="$repositorytype$" url="$repositoryurl$" commit="$repositorycommit$" />
+    <dependencies>
+      <group targetFramework=".NETFramework2.0" />
+    </dependencies>
+  </metadata>
+
+  <files>
+    <file src="net20\$id$.config" target="samples" />
+    <file src="net20\$id$.dll" target="lib\net20" />
+  </files>
+</package>
diff --git a/src/ext/Bal/appveyor.cmd b/src/ext/Bal/appveyor.cmd
new file mode 100644
index 00000000..f4e9c26e
--- /dev/null
+++ b/src/ext/Bal/appveyor.cmd
@@ -0,0 +1,17 @@
+@setlocal
+@pushd %~dp0
+@set _C=Release
+
+nuget restore || exit /b
+
+msbuild -p:Configuration=%_C% -Restore || exit /b
+msbuild -p:Configuration=%_C% src\test\examples\examples.proj || exit /b
+
+dotnet test -c %_C% --no-build src\test\WixToolsetTest.Bal || exit /b
+dotnet test -c %_C% --no-build src\test\WixToolsetTest.ManagedHost || exit /b
+
+msbuild -p:Configuration=%_C% -p:NoBuild=true -t:Pack src\wixext\WixToolset.Bal.wixext.csproj || exit /b
+msbuild -p:Configuration=%_C% -p:NoBuild=true -t:Pack src\WixToolset.Mba.Host\WixToolset.Mba.Host.csproj || exit /b
+
+@popd
+@endlocal
diff --git a/src/ext/Bal/appveyor.yml b/src/ext/Bal/appveyor.yml
new file mode 100644
index 00000000..7c686b04
--- /dev/null
+++ b/src/ext/Bal/appveyor.yml
@@ -0,0 +1,40 @@
+# Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+#
+#  Do NOT modify this file. Update the canonical version in Home\repo-template\src\appveyor.yml
+#  then update all of the repos.
+
+branches:
+  only:
+    - master
+    - develop
+
+image: Visual Studio 2019
+
+version: 0.0.0.{build}
+configuration: Release
+
+environment:
+  DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
+  DOTNET_CLI_TELEMETRY_OPTOUT: 1
+  NUGET_XMLDOC_MODE: skip
+
+build_script:
+  - appveyor.cmd
+
+pull_requests:
+  do_not_increment_build_number: true
+
+nuget:
+  disable_publish_on_pr: true
+
+skip_branch_with_pr: true
+skip_tags: true
+
+artifacts:
+- path: build\Release\**\*.nupkg
+  name: nuget
+
+notifications:
+- provider: Slack
+  incoming_webhook:
+    secure: p5xuu+4x2JHfwGDMDe5KcG1k7gZxqYc4jWVwvyNZv5cvkubPD2waJs5yXMAXZNN7Z63/3PWHb7q4KoY/99AjauYa1nZ4c5qYqRPFRBKTHfA=
diff --git a/src/ext/Bal/dnchost/coreclrhost.h b/src/ext/Bal/dnchost/coreclrhost.h
new file mode 100644
index 00000000..07f28735
--- /dev/null
+++ b/src/ext/Bal/dnchost/coreclrhost.h
@@ -0,0 +1,137 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+
+
+// ***** ABOUT THIS HEADER *****
+// **************************************************************************************
+//
+// This is the version on 2019-12-22 from
+// https://github.com/dotnet/runtime/blob/master/src/coreclr/src/coreclr/hosts/inc/coreclrhost.h
+//
+// **************************************************************************************
+// ****************************
+
+
+//
+// APIs for hosting CoreCLR
+//
+
+#ifndef __CORECLR_HOST_H__
+#define __CORECLR_HOST_H__
+
+#if defined(_WIN32) && defined(_M_IX86)
+#define CORECLR_CALLING_CONVENTION __stdcall
+#else
+#define CORECLR_CALLING_CONVENTION
+#endif
+
+// For each hosting API, we define a function prototype and a function pointer
+// The prototype is useful for implicit linking against the dynamic coreclr
+// library and the pointer for explicit dynamic loading (dlopen, LoadLibrary)
+#define CORECLR_HOSTING_API(function, ...) \
+    extern "C" int CORECLR_CALLING_CONVENTION function(__VA_ARGS__); \
+    typedef int (CORECLR_CALLING_CONVENTION *function##_ptr)(__VA_ARGS__)
+
+//
+// Initialize the CoreCLR. Creates and starts CoreCLR host and creates an app domain
+//
+// Parameters:
+//  exePath                 - Absolute path of the executable that invoked the ExecuteAssembly (the native host application)
+//  appDomainFriendlyName   - Friendly name of the app domain that will be created to execute the assembly
+//  propertyCount           - Number of properties (elements of the following two arguments)
+//  propertyKeys            - Keys of properties of the app domain
+//  propertyValues          - Values of properties of the app domain
+//  hostHandle              - Output parameter, handle of the created host
+//  domainId                - Output parameter, id of the created app domain
+//
+// Returns:
+//  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
+//
+CORECLR_HOSTING_API(coreclr_initialize,
+            const char* exePath,
+            const char* appDomainFriendlyName,
+            int propertyCount,
+            const char** propertyKeys,
+            const char** propertyValues,
+            void** hostHandle,
+            unsigned int* domainId);
+
+//
+// Shutdown CoreCLR. It unloads the app domain and stops the CoreCLR host.
+//
+// Parameters:
+//  hostHandle              - Handle of the host
+//  domainId                - Id of the domain
+//
+// Returns:
+//  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
+//
+CORECLR_HOSTING_API(coreclr_shutdown,
+            void* hostHandle,
+            unsigned int domainId);
+
+//
+// Shutdown CoreCLR. It unloads the app domain and stops the CoreCLR host.
+//
+// Parameters:
+//  hostHandle              - Handle of the host
+//  domainId                - Id of the domain
+//  latchedExitCode         - Latched exit code after domain unloaded
+//
+// Returns:
+//  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
+//
+CORECLR_HOSTING_API(coreclr_shutdown_2,
+            void* hostHandle,
+            unsigned int domainId,
+            int* latchedExitCode);
+
+//
+// Create a native callable function pointer for a managed method.
+//
+// Parameters:
+//  hostHandle              - Handle of the host
+//  domainId                - Id of the domain
+//  entryPointAssemblyName  - Name of the assembly which holds the custom entry point
+//  entryPointTypeName      - Name of the type which holds the custom entry point
+//  entryPointMethodName    - Name of the method which is the custom entry point
+//  delegate                - Output parameter, the function stores a native callable function pointer to the delegate at the specified address
+//
+// Returns:
+//  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
+//
+CORECLR_HOSTING_API(coreclr_create_delegate,
+            void* hostHandle,
+            unsigned int domainId,
+            const char* entryPointAssemblyName,
+            const char* entryPointTypeName,
+            const char* entryPointMethodName,
+            void** delegate);
+
+//
+// Execute a managed assembly with given arguments
+//
+// Parameters:
+//  hostHandle              - Handle of the host
+//  domainId                - Id of the domain
+//  argc                    - Number of arguments passed to the executed assembly
+//  argv                    - Array of arguments passed to the executed assembly
+//  managedAssemblyPath     - Path of the managed assembly to execute (or NULL if using a custom entrypoint).
+//  exitCode                - Exit code returned by the executed assembly
+//
+// Returns:
+//  HRESULT indicating status of the operation. S_OK if the assembly was successfully executed
+//
+CORECLR_HOSTING_API(coreclr_execute_assembly,
+            void* hostHandle,
+            unsigned int domainId,
+            int argc,
+            const char** argv,
+            const char* managedAssemblyPath,
+            unsigned int* exitCode);
+
+#undef CORECLR_HOSTING_API
+
+#endif // __CORECLR_HOST_H__
\ No newline at end of file
diff --git a/src/ext/Bal/dnchost/dnchost.cpp b/src/ext/Bal/dnchost/dnchost.cpp
new file mode 100644
index 00000000..8ca326fc
--- /dev/null
+++ b/src/ext/Bal/dnchost/dnchost.cpp
@@ -0,0 +1,309 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+static DNCSTATE vstate = { };
+
+
+// internal function declarations
+
+static HRESULT LoadModulePaths(
+    __in DNCSTATE* pState
+    );
+static HRESULT LoadDncConfiguration(
+    __in DNCSTATE* pState,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs
+    );
+static HRESULT LoadRuntime(
+    __in DNCSTATE* pState
+    );
+static HRESULT LoadManagedBootstrapperApplicationFactory(
+    __in DNCSTATE* pState
+    );
+static HRESULT CreatePrerequisiteBA(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in LPCWSTR wzAppBase,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    );
+
+
+// function definitions
+
+extern "C" BOOL WINAPI DllMain(
+    IN HINSTANCE hInstance,
+    IN DWORD dwReason,
+    IN LPVOID /* pvReserved */
+    )
+{
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+        ::DisableThreadLibraryCalls(hInstance);
+        vstate.hInstance = hInstance;
+        break;
+
+    case DLL_PROCESS_DETACH:
+        vstate.hInstance = NULL;
+        break;
+    }
+
+    return TRUE;
+}
+
+extern "C" HRESULT WINAPI BootstrapperApplicationCreate(
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    HRESULT hrHostInitialization = S_OK;
+    IBootstrapperEngine* pEngine = NULL;
+
+    // coreclr.dll doesn't support unloading, so the rest of the .NET Core hosting stack doesn't support it either.
+    // This means we also can't unload.
+    pResults->fDisableUnloading = TRUE;
+
+    hr = BalInitializeFromCreateArgs(pArgs, &pEngine);
+    ExitOnFailure(hr, "Failed to initialize Bal.");
+
+    if (!vstate.fInitialized)
+    {
+        hr = XmlInitialize();
+        BalExitOnFailure(hr, "Failed to initialize XML.");
+
+        hr = LoadModulePaths(&vstate);
+        BalExitOnFailure(hr, "Failed to get the host base path.");
+
+        hr = LoadDncConfiguration(&vstate, pArgs);
+        BalExitOnFailure(hr, "Failed to get the dnc configuration.");
+
+        vstate.fInitialized = TRUE;
+    }
+
+    if (!vstate.fInitializedRuntime)
+    {
+        hr = LoadRuntime(&vstate);
+
+        vstate.fInitializedRuntime = SUCCEEDED(hr);
+    }
+
+    if (vstate.fInitializedRuntime)
+    {
+        if (!vstate.pAppFactory)
+        {
+            hr = LoadManagedBootstrapperApplicationFactory(&vstate);
+            BalExitOnFailure(hr, "Failed to create the .NET Core bootstrapper application factory.");
+        }
+
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Loading .NET Core %ls bootstrapper application.", DNCHOSTTYPE_FDD == vstate.type ? L"FDD" : L"SCD");
+
+        hr = vstate.pAppFactory->Create(pArgs, pResults);
+        BalExitOnFailure(hr, "Failed to create the .NET Core bootstrapper application.");
+    }
+    else // fallback to the prerequisite BA.
+    {
+        if (DNCHOSTTYPE_SCD == vstate.type)
+        {
+            hrHostInitialization = E_DNCHOST_SCD_RUNTIME_FAILURE;
+            BalLogError(hr, "The self-contained .NET Core runtime failed to load. This is an unrecoverable error.");
+        }
+        else
+        {
+            hrHostInitialization = S_OK;
+        }
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Loading prerequisite bootstrapper application because .NET Core host could not be loaded, error: 0x%08x.", hr);
+
+        hr = CreatePrerequisiteBA(hrHostInitialization, pEngine, vstate.sczAppBase, pArgs, pResults);
+        BalExitOnFailure(hr, "Failed to create the pre-requisite bootstrapper application.");
+    }
+
+LExit:
+    ReleaseNullObject(pEngine);
+
+    return hr;
+}
+
+extern "C" void WINAPI BootstrapperApplicationDestroy()
+{
+    if (vstate.hMbapreqModule)
+    {
+        PFN_BOOTSTRAPPER_APPLICATION_DESTROY pfnDestroy = reinterpret_cast<PFN_BOOTSTRAPPER_APPLICATION_DESTROY>(::GetProcAddress(vstate.hMbapreqModule, "DncPrereqBootstrapperApplicationDestroy"));
+        if (pfnDestroy)
+        {
+            (*pfnDestroy)();
+        }
+
+        ::FreeLibrary(vstate.hMbapreqModule);
+        vstate.hMbapreqModule = NULL;
+    }
+
+    BalUninitialize();
+}
+
+static HRESULT LoadModulePaths(
+    __in DNCSTATE* pState
+    )
+{
+    HRESULT hr = S_OK;
+
+    hr = PathForCurrentProcess(&pState->sczModuleFullPath, pState->hInstance);
+    BalExitOnFailure(hr, "Failed to get the full host path.");
+
+    hr = PathGetDirectory(pState->sczModuleFullPath, &pState->sczAppBase);
+    BalExitOnFailure(hr, "Failed to get the directory of the full process path.");
+
+    hr = PathConcat(pState->sczAppBase, DNC_ASSEMBLY_FILE_NAME, &pState->sczManagedHostPath);
+    BalExitOnFailure(hr, "Failed to create managed host path.");
+
+LExit:
+    return hr;
+}
+
+static HRESULT LoadDncConfiguration(
+    __in DNCSTATE* pState,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs
+    )
+{
+    HRESULT hr = S_OK;
+    IXMLDOMDocument* pixdManifest = NULL;
+    IXMLDOMNode* pixnHost = NULL;
+    LPWSTR sczPayloadName = NULL;
+    DWORD dwBool = 0;
+
+    hr = XmlLoadDocumentFromFile(pArgs->pCommand->wzBootstrapperApplicationDataPath, &pixdManifest);
+    BalExitOnFailure(hr, "Failed to load BalManifest '%ls'", pArgs->pCommand->wzBootstrapperApplicationDataPath);
+
+    hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixBalBAFactoryAssembly", &pixnHost);
+    BalExitOnFailure(hr, "Failed to get WixBalBAFactoryAssembly element.");
+
+    if (S_FALSE == hr)
+    {
+        hr = E_NOTFOUND;
+        BalExitOnRootFailure(hr, "Failed to find WixBalBAFactoryAssembly element in bootstrapper application config.");
+    }
+
+    hr = XmlGetAttributeEx(pixnHost, L"FilePath", &sczPayloadName);
+    BalExitOnFailure(hr, "Failed to get WixBalBAFactoryAssembly/@FilePath.");
+
+    hr = PathConcat(pArgs->pCommand->wzBootstrapperWorkingFolder, sczPayloadName, &pState->sczBaFactoryAssemblyPath);
+    BalExitOnFailure(hr, "Failed to create BaFactoryAssemblyPath.");
+
+    LPCWSTR wzFileName = PathFile(pState->sczBaFactoryAssemblyPath);
+    LPCWSTR wzExtension = PathExtension(pState->sczBaFactoryAssemblyPath);
+    if (!wzExtension)
+    {
+        BalExitOnFailure(hr = E_FAIL, "BaFactoryAssemblyPath has no extension.");
+    }
+
+    hr = StrAllocString(&pState->sczBaFactoryAssemblyName, wzFileName, wzExtension - wzFileName);
+    BalExitOnFailure(hr, "Failed to copy BAFactoryAssembly payload Name.");
+
+    hr = StrAllocString(&pState->sczBaFactoryDepsJsonPath, pState->sczBaFactoryAssemblyPath, wzExtension - pState->sczBaFactoryAssemblyPath);
+    BalExitOnFailure(hr, "Failed to initialize deps json path.");
+
+    hr = StrAllocString(&pState->sczBaFactoryRuntimeConfigPath, pState->sczBaFactoryDepsJsonPath, 0);
+    BalExitOnFailure(hr, "Failed to initialize runtime config path.");
+
+    hr = StrAllocConcat(&pState->sczBaFactoryDepsJsonPath, L".deps.json", 0);
+    BalExitOnFailure(hr, "Failed to concat extension to deps json path.");
+
+    hr = StrAllocConcat(&pState->sczBaFactoryRuntimeConfigPath, L".runtimeconfig.json", 0);
+    BalExitOnFailure(hr, "Failed to concat extension to runtime config path.");
+
+    pState->type = DNCHOSTTYPE_FDD;
+
+    hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixDncOptions", &pixnHost);
+    if (S_FALSE == hr)
+    {
+        ExitFunction1(hr = S_OK);
+    }
+    BalExitOnFailure(hr, "Failed to find WixDncOptions element in bootstrapper application config.");
+
+    hr = XmlGetAttributeNumber(pixnHost, L"SelfContainedDeployment", &dwBool);
+    if (S_FALSE == hr)
+    {
+        hr = S_OK;
+    }
+    else if (SUCCEEDED(hr) && dwBool)
+    {
+        pState->type = DNCHOSTTYPE_SCD;
+    }
+    BalExitOnFailure(hr, "Failed to get SelfContainedDeployment value.");
+
+LExit:
+    ReleaseStr(sczPayloadName);
+    ReleaseObject(pixnHost);
+    ReleaseObject(pixdManifest);
+
+    return hr;
+}
+
+static HRESULT LoadRuntime(
+    __in DNCSTATE* pState
+    )
+{
+    HRESULT hr = S_OK;
+
+    hr = DnchostLoadRuntime(
+        &pState->hostfxrState,
+        pState->sczModuleFullPath,
+        pState->sczManagedHostPath,
+        pState->sczBaFactoryDepsJsonPath,
+        pState->sczBaFactoryRuntimeConfigPath);
+
+    return hr;
+}
+
+static HRESULT LoadManagedBootstrapperApplicationFactory(
+    __in DNCSTATE* pState
+    )
+{
+    HRESULT hr = S_OK;
+
+    hr = DnchostCreateFactory(
+        &pState->hostfxrState,
+        pState->sczBaFactoryAssemblyName,
+        pState->sczBaFactoryAssemblyPath,
+        &pState->pAppFactory);
+
+    return hr;
+}
+
+static HRESULT CreatePrerequisiteBA(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in LPCWSTR wzAppBase,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczDncpreqPath = NULL;
+    HMODULE hModule = NULL;
+
+    hr = PathConcat(wzAppBase, L"dncpreq.dll", &sczDncpreqPath);
+    BalExitOnFailure(hr, "Failed to get path to pre-requisite BA.");
+
+    hModule = ::LoadLibraryW(sczDncpreqPath);
+    BalExitOnNullWithLastError(hModule, hr, "Failed to load pre-requisite BA DLL.");
+
+    PFN_DNCPREQ_BOOTSTRAPPER_APPLICATION_CREATE pfnCreate = reinterpret_cast<PFN_DNCPREQ_BOOTSTRAPPER_APPLICATION_CREATE>(::GetProcAddress(hModule, "DncPrereqBootstrapperApplicationCreate"));
+    BalExitOnNullWithLastError(pfnCreate, hr, "Failed to get DncPrereqBootstrapperApplicationCreate entry-point from: %ls", sczDncpreqPath);
+
+    hr = pfnCreate(hrHostInitialization, pEngine, pArgs, pResults);
+    BalExitOnFailure(hr, "Failed to create prequisite bootstrapper app.");
+
+    vstate.hMbapreqModule = hModule;
+    hModule = NULL;
+
+LExit:
+    if (hModule)
+    {
+        ::FreeLibrary(hModule);
+    }
+    ReleaseStr(sczDncpreqPath);
+
+    return hr;
+}
diff --git a/src/ext/Bal/dnchost/dnchost.def b/src/ext/Bal/dnchost/dnchost.def
new file mode 100644
index 00000000..4488df94
--- /dev/null
+++ b/src/ext/Bal/dnchost/dnchost.def
@@ -0,0 +1,6 @@
+; Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+EXPORTS
+    BootstrapperApplicationCreate
+    BootstrapperApplicationDestroy
diff --git a/src/ext/Bal/dnchost/dnchost.h b/src/ext/Bal/dnchost/dnchost.h
new file mode 100644
index 00000000..22fd8f5e
--- /dev/null
+++ b/src/ext/Bal/dnchost/dnchost.h
@@ -0,0 +1,35 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+enum DNCHOSTTYPE
+{
+    DNCHOSTTYPE_UNKNOWN,
+    DNCHOSTTYPE_FDD,
+    DNCHOSTTYPE_SCD,
+};
+
+extern "C" typedef HRESULT(WINAPI* PFN_DNCPREQ_BOOTSTRAPPER_APPLICATION_CREATE)(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    );
+
+struct DNCSTATE
+{
+    BOOL fInitialized;
+    BOOL fInitializedRuntime;
+    HINSTANCE hInstance;
+    LPWSTR sczModuleFullPath;
+    LPWSTR sczAppBase;
+    LPWSTR sczManagedHostPath;
+    LPWSTR sczBaFactoryAssemblyName;
+    LPWSTR sczBaFactoryAssemblyPath;
+    LPWSTR sczBaFactoryDepsJsonPath;
+    LPWSTR sczBaFactoryRuntimeConfigPath;
+    DNCHOSTTYPE type;
+    HOSTFXR_STATE hostfxrState;
+    IBootstrapperApplicationFactory* pAppFactory;
+    HMODULE hMbapreqModule;
+};
diff --git a/src/ext/Bal/dnchost/dnchost.vcxproj b/src/ext/Bal/dnchost/dnchost.vcxproj
new file mode 100644
index 00000000..bef3f77e
--- /dev/null
+++ b/src/ext/Bal/dnchost/dnchost.vcxproj
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" />
+  <Import Project="..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props" Condition="Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" />
+  <Import Project="..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props" Condition="Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" />
+  <Import Project="..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props" Condition="Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{B6F70281-6583-4138-BB7F-AABFEBBB3CA2}</ProjectGuid>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <TargetName>dnchost</TargetName>
+    <ProjectModuleDefinitionFile>dnchost.def</ProjectModuleDefinitionFile>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <PropertyGroup>
+    <NetHostPlatform>$(Platform)</NetHostPlatform>
+    <NetHostPlatform Condition=" '$(NetHostPlatform)'=='Win32' ">x86</NetHostPlatform>
+    <NetHostPath>..\..\packages\runtime.win-$(NetHostPlatform).Microsoft.NETCore.DotNetAppHost.5.0.0\runtimes\win-$(NetHostPlatform)\native\</NetHostPath>
+    <ProjectAdditionalLinkLibraries>shlwapi.lib;$(NetHostPath)libnethost.lib</ProjectAdditionalLinkLibraries>
+  </PropertyGroup>
+  <ItemGroup>
+    <ClCompile Include="dnchost.cpp" />
+    <ClCompile Include="dncutil.cpp" />
+    <ClCompile Include="precomp.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="coreclrhost.h" />
+    <ClInclude Include="dnchost.h" />
+    <ClInclude Include="dncutil.h" />
+    <ClInclude Include="precomp.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="dnchost.def" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <AdditionalIncludeDirectories>$(BaseOutputPath)obj;$(NetHostPath);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>      
+      <AdditionalOptions>/LTCG %(AdditionalOptions)</AdditionalOptions>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\WixToolset.Dnc.Host\WixToolset.Dnc.Host.csproj">
+      <Project>{0D780900-C2FF-4FA2-8CB5-8A19768724C5}</Project>
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+      <SkipGetTargetFrameworkProperties>true</SkipGetTargetFrameworkProperties>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" />
+  <Import Project="..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props'))" />
+  </Target>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/dnchost/dncutil.cpp b/src/ext/Bal/dnchost/dncutil.cpp
new file mode 100644
index 00000000..34d14911
--- /dev/null
+++ b/src/ext/Bal/dnchost/dncutil.cpp
@@ -0,0 +1,411 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+// https://github.com/dotnet/runtime/blob/master/src/installer/corehost/error_codes.h
+#define InvalidArgFailure 0x80008081
+#define HostApiBufferTooSmall 0x80008098
+#define HostApiUnsupportedVersion 0x800080a2
+
+// internal function declarations
+
+static HRESULT GetHostfxrPath(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    );
+static HRESULT LoadHostfxr(
+    __in HOSTFXR_STATE* pState
+    );
+static HRESULT InitializeHostfxr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzManagedHostPath,
+    __in LPCWSTR wzDepsJsonPath,
+    __in LPCWSTR wzRuntimeConfigPath
+    );
+static HRESULT InitializeCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    );
+static HRESULT InitializeCoreClrPre5(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    );
+static HRESULT LoadCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzCoreClrPath
+    );
+static HRESULT StartCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath,
+    __in DWORD cProperties,
+    __in LPCWSTR* propertyKeys,
+    __in LPCWSTR* propertyValues
+    );
+
+
+// function definitions
+
+HRESULT DnchostLoadRuntime(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath,
+    __in LPCWSTR wzManagedHostPath,
+    __in LPCWSTR wzDepsJsonPath,
+    __in LPCWSTR wzRuntimeConfigPath
+    )
+{
+    HRESULT hr = S_OK;
+
+    hr = GetHostfxrPath(pState, wzNativeHostPath);
+    BalExitOnFailure(hr, "Failed to find hostfxr.");
+
+    hr = LoadHostfxr(pState);
+    BalExitOnFailure(hr, "Failed to load hostfxr.");
+
+    hr = InitializeHostfxr(pState, wzManagedHostPath, wzDepsJsonPath, wzRuntimeConfigPath);
+    BalExitOnFailure(hr, "Failed to initialize hostfxr.");
+
+    hr = InitializeCoreClr(pState, wzNativeHostPath);
+    BalExitOnFailure(hr, "Failed to initialize coreclr.");
+
+LExit:
+    return hr;
+}
+
+HRESULT DnchostCreateFactory(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzBaFactoryAssemblyName,
+    __in LPCWSTR wzBaFactoryAssemblyPath,
+    __out IBootstrapperApplicationFactory** ppAppFactory
+    )
+{
+    HRESULT hr = S_OK;
+    PFNCREATEBAFACTORY pfnCreateBAFactory = NULL;
+
+    if (pState->pfnGetFunctionPointer)
+    {
+        hr = pState->pfnGetFunctionPointer(
+            DNC_ENTRY_TYPEW,
+            DNC_STATIC_ENTRY_METHODW,
+            DNC_STATIC_ENTRY_DELEGATEW,
+            NULL,
+            NULL,
+            reinterpret_cast<void**>(&pfnCreateBAFactory));
+        BalExitOnFailure(hr, "Failed to create delegate through GetFunctionPointer.");
+    }
+    else
+    {
+        hr = pState->pfnCoreclrCreateDelegate(
+            pState->pClrHandle,
+            pState->dwDomainId,
+            DNC_ASSEMBLY_FULL_NAME,
+            DNC_ENTRY_TYPE,
+            DNC_STATIC_ENTRY_METHOD,
+            reinterpret_cast<void**>(&pfnCreateBAFactory));
+        BalExitOnFailure(hr, "Failed to create delegate in app domain.");
+    }
+
+    *ppAppFactory = pfnCreateBAFactory(wzBaFactoryAssemblyName, wzBaFactoryAssemblyPath);
+
+LExit:
+    return hr;
+}
+
+static HRESULT GetHostfxrPath(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    )
+{
+    HRESULT hr = S_OK;
+    get_hostfxr_parameters getHostfxrParameters = { };
+    int nrc = 0;
+    size_t cchHostFxrPath = MAX_PATH;
+
+    getHostfxrParameters.size = sizeof(get_hostfxr_parameters);
+    getHostfxrParameters.assembly_path = wzNativeHostPath;
+
+    // get_hostfxr_path does a full search on every call, so
+    //    minimize the number of calls
+    //    need to loop
+    for (;;)
+    {
+        cchHostFxrPath *= 2;
+        hr = StrAlloc(&pState->sczHostfxrPath, cchHostFxrPath);
+        BalExitOnFailure(hr, "Failed to allocate hostFxrPath.");
+
+        nrc = get_hostfxr_path(pState->sczHostfxrPath, &cchHostFxrPath, &getHostfxrParameters);
+        if (HostApiBufferTooSmall != nrc)
+        {
+            break;
+        }
+    }
+    if (0 != nrc)
+    {
+        BalExitOnFailure(hr = nrc, "GetHostfxrPath failed");
+    }
+
+LExit:
+    return hr;
+}
+
+static HRESULT LoadHostfxr(
+    __in HOSTFXR_STATE* pState
+    )
+{
+    HRESULT hr = S_OK;
+    HMODULE hHostfxr;
+
+    hHostfxr = ::LoadLibraryExW(pState->sczHostfxrPath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+    BalExitOnNullWithLastError(hHostfxr, hr, "Failed to load hostfxr from '%ls'.", pState->sczHostfxrPath);
+
+    pState->pfnHostfxrInitializeForApp = reinterpret_cast<hostfxr_initialize_for_dotnet_command_line_fn>(::GetProcAddress(hHostfxr, "hostfxr_initialize_for_dotnet_command_line"));
+    BalExitOnNullWithLastError(pState->pfnHostfxrInitializeForApp, hr, "Failed to get procedure address for hostfxr_initialize_for_dotnet_command_line.");
+
+    pState->pfnHostfxrGetRuntimeProperties = reinterpret_cast<hostfxr_get_runtime_properties_fn>(::GetProcAddress(hHostfxr, "hostfxr_get_runtime_properties"));
+    BalExitOnNullWithLastError(pState->pfnHostfxrGetRuntimeProperties, hr, "Failed to get procedure address for hostfxr_get_runtime_properties.");
+
+    pState->pfnHostfxrSetErrorWriter = reinterpret_cast<hostfxr_set_error_writer_fn>(::GetProcAddress(hHostfxr, "hostfxr_set_error_writer"));
+    BalExitOnNullWithLastError(pState->pfnHostfxrSetErrorWriter, hr, "Failed to get procedure address for hostfxr_set_error_writer.");
+
+    pState->pfnHostfxrClose = reinterpret_cast<hostfxr_close_fn>(::GetProcAddress(hHostfxr, "hostfxr_close"));
+    BalExitOnNullWithLastError(pState->pfnHostfxrClose, hr, "Failed to get procedure address for hostfxr_close.");
+
+    pState->pfnHostfxrGetRuntimeDelegate = reinterpret_cast<hostfxr_get_runtime_delegate_fn>(::GetProcAddress(hHostfxr, "hostfxr_get_runtime_delegate"));
+    BalExitOnNullWithLastError(pState->pfnHostfxrGetRuntimeDelegate, hr, "Failed to get procedure address for hostfxr_get_runtime_delegate.");
+
+LExit:
+    // Never unload the module since it isn't meant to be unloaded.
+
+    return hr;
+}
+
+static void HOSTFXR_CALLTYPE DnchostErrorWriter(
+    __in LPCWSTR wzMessage
+    )
+{
+    BOOTSTRAPPER_LOG_LEVEL level = BOOTSTRAPPER_LOG_LEVEL_ERROR;
+
+    if (CSTR_EQUAL == ::CompareString(LOCALE_INVARIANT, 0, wzMessage, -1, L"The requested delegate type is not available in the target framework.", -1))
+    {
+        level = BOOTSTRAPPER_LOG_LEVEL_DEBUG;
+    }
+
+    BalLog(level, "error from hostfxr: %ls", wzMessage);
+}
+
+static HRESULT InitializeHostfxr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzManagedHostPath,
+    __in LPCWSTR wzDepsJsonPath,
+    __in LPCWSTR wzRuntimeConfigPath
+    )
+{
+    HRESULT hr = S_OK;
+
+    pState->pfnHostfxrSetErrorWriter(static_cast<hostfxr_error_writer_fn>(&DnchostErrorWriter));
+
+    LPCWSTR argv[] = {
+        L"exec",
+        L"--depsfile",
+        wzDepsJsonPath,
+        L"--runtimeconfig",
+        wzRuntimeConfigPath,
+        wzManagedHostPath,
+    };
+    hr = pState->pfnHostfxrInitializeForApp(sizeof(argv)/sizeof(LPWSTR), argv, NULL, &pState->hostContextHandle);
+    BalExitOnFailure(hr, "HostfxrInitializeForApp failed");
+
+LExit:
+    return hr;
+}
+
+static HRESULT InitializeCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    )
+{
+    HRESULT hr = S_OK;
+
+    hr = pState->pfnHostfxrGetRuntimeDelegate(pState->hostContextHandle, hdt_get_function_pointer, reinterpret_cast<void**>(&pState->pfnGetFunctionPointer));
+    if (InvalidArgFailure == hr || // old versions of hostfxr don't allow calling GetRuntimeDelegate from InitializeForApp.
+        HostApiUnsupportedVersion == hr) // hdt_get_function_pointer was added in .NET 5.
+    {
+        hr = InitializeCoreClrPre5(pState, wzNativeHostPath);
+    }
+    else
+    {
+        ExitOnFailure(hr, "HostfxrGetRuntimeDelegate failed");
+    }
+
+LExit:
+    return hr;
+}
+
+static HRESULT InitializeCoreClrPre5(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath
+    )
+{
+    HRESULT hr = S_OK;
+    int32_t rc = 0;
+    LPCWSTR* rgPropertyKeys = NULL;
+    LPCWSTR* rgPropertyValues = NULL;
+    size_t cProperties = 0;
+    LPWSTR* rgDirectories = NULL;
+    UINT cDirectories = 0;
+    LPWSTR sczCoreClrPath = NULL;
+
+    // We are not using hostfxr as it was intended to be used. We need to initialize hostfxr so that it properly initializes hostpolicy -
+    // there are pieces of the framework such as AssemblyDependencyResolver that won't work without that. We also need hostfxr to find a
+    // compatible framework for framework-dependent deployed BAs. We had to use hostfxr_initialize_for_dotnet_command_line since
+    // hostfxr_initialize_for_runtime_config doesn't currently (3.x) support self-contained deployed BAs. That means we're supposed to
+    // start the runtime through hostfxr_run_app, but that method shuts down the runtime before returning. We actually want to call
+    // hostfxr_get_runtime_delegate, but that method currently requires hostfxr to be initialized through
+    // hostfxr_initialize_for_runtime_config. So we're forced to locate coreclr.dll and manually load the runtime ourselves.
+
+    // Unfortunately, that's not the only problem. hostfxr has global state that tracks whether it started the runtime. While we keep our
+    // hostfxr_handle open, everyone that calls the hostfxr_initialize_* methods will block until we have started the runtime through
+    // hostfxr or closed our handle. If we close the handle, then hostfxr could potentially try to load a second runtime into the
+    // process, which is not supported. We're going to just keep our handle open since no one else in the process should be trying to
+    // start the runtime anyway.
+
+    rc = pState->pfnHostfxrGetRuntimeProperties(pState->hostContextHandle, &cProperties, rgPropertyKeys, rgPropertyValues);
+    if (HostApiBufferTooSmall != rc)
+    {
+        BalExitOnFailure(hr = rc, "HostfxrGetRuntimeProperties failed to return required size.");
+    }
+
+    rgPropertyKeys = static_cast<LPCWSTR*>(MemAlloc(sizeof(LPWSTR) * cProperties, TRUE));
+    rgPropertyValues = static_cast<LPCWSTR*>(MemAlloc(sizeof(LPWSTR) * cProperties, TRUE));
+    if (!rgPropertyKeys || !rgPropertyValues)
+    {
+        BalExitOnFailure(hr = E_OUTOFMEMORY, "Failed to allocate buffers for runtime properties.");
+    }
+
+    hr = pState->pfnHostfxrGetRuntimeProperties(pState->hostContextHandle, &cProperties, rgPropertyKeys, rgPropertyValues);
+    BalExitOnFailure(hr, "HostfxrGetRuntimeProperties failed.");
+
+    for (DWORD i = 0; i < cProperties; ++i)
+    {
+        if (CSTR_EQUAL == ::CompareString(LOCALE_INVARIANT, 0, rgPropertyKeys[i], -1, L"NATIVE_DLL_SEARCH_DIRECTORIES", -1))
+        {
+            hr = StrSplitAllocArray(&rgDirectories, &cDirectories, rgPropertyValues[i], L";");
+            BalExitOnFailure(hr, "Failed to split NATIVE_DLL_SEARCH_DIRECTORIES '%ls'", rgPropertyValues[i]);
+        }
+    }
+
+    for (DWORD i = 0; i < cDirectories; ++i)
+    {
+        hr = PathConcat(rgDirectories[i], L"coreclr.dll", &sczCoreClrPath);
+        BalExitOnFailure(hr, "Failed to allocate path to coreclr.");
+
+        if (::PathFileExists(sczCoreClrPath))
+        {
+            break;
+        }
+        else
+        {
+            ReleaseNullStr(sczCoreClrPath);
+        }
+    }
+
+    if (!sczCoreClrPath)
+    {
+        for (DWORD i = 0; i < cProperties; ++i)
+        {
+            BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "%ls: %ls", rgPropertyKeys[i], rgPropertyValues[i]);
+        }
+        BalExitOnFailure(hr = E_FILENOTFOUND, "Failed to locate coreclr.dll.");
+    }
+
+    hr = LoadCoreClr(pState, sczCoreClrPath);
+    BalExitOnFailure(hr, "Failed to load coreclr.");
+
+    hr = StartCoreClr(pState, wzNativeHostPath, (DWORD)cProperties, rgPropertyKeys, rgPropertyValues);
+    BalExitOnFailure(hr, "Failed to start coreclr.");
+
+LExit:
+    MemFree(rgDirectories);
+    MemFree(rgPropertyValues);
+    MemFree(rgPropertyKeys);
+    ReleaseStr(sczCoreClrPath);
+
+    return hr;
+}
+
+static HRESULT LoadCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzCoreClrPath
+    )
+{
+    HRESULT hr = S_OK;
+    HMODULE hModule = NULL;
+
+    hModule = ::LoadLibraryExW(wzCoreClrPath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+    BalExitOnNullWithLastError(hModule, hr, "Failed to load coreclr.dll from '%ls'.", wzCoreClrPath);
+
+    pState->pfnCoreclrInitialize = reinterpret_cast<coreclr_initialize_ptr>(::GetProcAddress(hModule, "coreclr_initialize"));
+    BalExitOnNullWithLastError(pState->pfnCoreclrInitialize, hr, "Failed to get procedure address for coreclr_initialize.");
+
+    pState->pfnCoreclrCreateDelegate = reinterpret_cast<coreclr_create_delegate_ptr>(::GetProcAddress(hModule, "coreclr_create_delegate"));
+    BalExitOnNullWithLastError(pState->pfnCoreclrCreateDelegate, hr, "Failed to get procedure address for coreclr_create_delegate.");
+
+LExit:
+    // Never unload the module since coreclr doesn't support it.
+
+    return hr;
+}
+
+static HRESULT StartCoreClr(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath,
+    __in DWORD cProperties,
+    __in LPCWSTR* propertyKeys,
+    __in LPCWSTR* propertyValues
+    )
+{
+    HRESULT hr = S_OK;
+    LPSTR szNativeHostPath = NULL;
+    LPSTR* rgPropertyKeys = NULL;
+    LPSTR* rgPropertyValues = NULL;
+    
+    rgPropertyKeys = static_cast<LPSTR*>(MemAlloc(sizeof(LPSTR) * cProperties, TRUE));
+    rgPropertyValues = static_cast<LPSTR*>(MemAlloc(sizeof(LPSTR) * cProperties, TRUE));
+    if (!rgPropertyKeys || !rgPropertyValues)
+    {
+        BalExitOnFailure(hr = E_OUTOFMEMORY, "Failed to allocate buffers for runtime properties.");
+    }
+
+    hr = StrAnsiAllocString(&szNativeHostPath, wzNativeHostPath, 0, CP_UTF8);
+    BalExitOnFailure(hr, "Failed to convert module path to UTF8: %ls", wzNativeHostPath);
+
+    for (DWORD i = 0; i < cProperties; ++i)
+    {
+        hr = StrAnsiAllocString(&rgPropertyKeys[i], propertyKeys[i], 0, CP_UTF8);
+        BalExitOnFailure(hr, "Failed to convert property key to UTF8: %ls", propertyKeys[i]);
+
+        hr = StrAnsiAllocString(&rgPropertyValues[i], propertyValues[i], 0, CP_UTF8);
+        BalExitOnFailure(hr, "Failed to convert property value to UTF8: %ls", propertyValues[i]);
+    }
+
+    hr = pState->pfnCoreclrInitialize(szNativeHostPath, "MBA", cProperties, (LPCSTR*)rgPropertyKeys, (LPCSTR*)rgPropertyValues, &pState->pClrHandle, &pState->dwDomainId);
+    BalExitOnFailure(hr, "CoreclrInitialize failed.");
+
+LExit:
+    for (DWORD i = 0; i < cProperties; ++i)
+    {
+        if (rgPropertyKeys)
+        {
+            ReleaseStr(rgPropertyKeys[i]);
+        }
+
+        if (rgPropertyValues)
+        {
+            ReleaseStr(rgPropertyValues[i]);
+        }
+    }
+    ReleaseMem(rgPropertyValues);
+    ReleaseMem(rgPropertyKeys);
+    ReleaseStr(szNativeHostPath);
+
+    return hr;
+}
diff --git a/src/ext/Bal/dnchost/dncutil.h b/src/ext/Bal/dnchost/dncutil.h
new file mode 100644
index 00000000..85eda3b2
--- /dev/null
+++ b/src/ext/Bal/dnchost/dncutil.h
@@ -0,0 +1,38 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+typedef IBootstrapperApplicationFactory* (STDMETHODCALLTYPE* PFNCREATEBAFACTORY)(
+    __in LPCWSTR wzBaFactoryAssemblyName,
+    __in LPCWSTR wzBaFactoryAssemblyPath
+    );
+
+struct HOSTFXR_STATE
+{
+    LPWSTR sczHostfxrPath;
+    hostfxr_handle hostContextHandle;
+    hostfxr_initialize_for_dotnet_command_line_fn pfnHostfxrInitializeForApp;
+    hostfxr_get_runtime_properties_fn pfnHostfxrGetRuntimeProperties;
+    hostfxr_set_error_writer_fn pfnHostfxrSetErrorWriter;
+    hostfxr_close_fn pfnHostfxrClose;
+    hostfxr_get_runtime_delegate_fn pfnHostfxrGetRuntimeDelegate;
+    get_function_pointer_fn pfnGetFunctionPointer;
+    coreclr_initialize_ptr pfnCoreclrInitialize;
+    coreclr_create_delegate_ptr pfnCoreclrCreateDelegate;
+    void* pClrHandle;
+    UINT dwDomainId;
+};
+
+HRESULT DnchostLoadRuntime(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzNativeHostPath,
+    __in LPCWSTR wzManagedHostPath,
+    __in LPCWSTR wzDepsJsonPath,
+    __in LPCWSTR wzRuntimeConfigPath
+    );
+
+HRESULT DnchostCreateFactory(
+    __in HOSTFXR_STATE* pState,
+    __in LPCWSTR wzBaFactoryAssemblyName,
+    __in LPCWSTR wzBaFactoryAssemblyPath,
+    __out IBootstrapperApplicationFactory** ppAppFactory
+    );
diff --git a/src/ext/Bal/dnchost/packages.config b/src/ext/Bal/dnchost/packages.config
new file mode 100644
index 00000000..6c369364
--- /dev/null
+++ b/src/ext/Bal/dnchost/packages.config
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Build.Tasks.Git" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.Common" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.GitHub" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Nerdbank.GitVersioning" version="3.3.37" targetFramework="native" developmentDependency="true" />
+  <package id="runtime.win-arm64.Microsoft.NETCore.DotNetAppHost" version="5.0.0" targetFramework="native" />
+  <package id="runtime.win-x64.Microsoft.NETCore.DotNetAppHost" version="5.0.0" targetFramework="native" />
+  <package id="runtime.win-x86.Microsoft.NETCore.DotNetAppHost" version="5.0.0" targetFramework="native" />
+  <package id="WixToolset.BalUtil" version="4.0.58" targetFramework="native" />
+  <package id="WixToolset.BootstrapperCore.Native" version="4.0.141" targetFramework="native" />
+  <package id="WixToolset.DUtil" version="4.0.72" targetFramework="native" />
+</packages>
\ No newline at end of file
diff --git a/src/ext/Bal/dnchost/precomp.cpp b/src/ext/Bal/dnchost/precomp.cpp
new file mode 100644
index 00000000..37664a1c
--- /dev/null
+++ b/src/ext/Bal/dnchost/precomp.cpp
@@ -0,0 +1,3 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
diff --git a/src/ext/Bal/dnchost/precomp.h b/src/ext/Bal/dnchost/precomp.h
new file mode 100644
index 00000000..84ff6424
--- /dev/null
+++ b/src/ext/Bal/dnchost/precomp.h
@@ -0,0 +1,31 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include <windows.h>
+#include <msiquery.h>
+#include <corerror.h>
+#include <Shlwapi.h>
+
+#include <dutil.h>
+#include <memutil.h>
+#include <pathutil.h>
+#include <strutil.h>
+#include <xmlutil.h>
+
+#include <BootstrapperEngine.h>
+#include <BootstrapperApplication.h>
+
+#include <IBootstrapperEngine.h>
+#include <IBootstrapperApplication.h>
+#include <IBootstrapperApplicationFactory.h>
+#include <balutil.h>
+
+#include <WixToolset.Dnc.Host.h>
+#define NETHOST_USE_AS_STATIC
+#include <nethost.h>
+#include <hostfxr.h>
+#include <coreclr_delegates.h>
+
+#include "coreclrhost.h"
+#include "dncutil.h"
+#include "dnchost.h"
diff --git a/src/ext/Bal/mbahost/mbahost.cpp b/src/ext/Bal/mbahost/mbahost.cpp
new file mode 100644
index 00000000..735f9f21
--- /dev/null
+++ b/src/ext/Bal/mbahost/mbahost.cpp
@@ -0,0 +1,649 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+#include <WixToolset.Mba.Host.h> // includes the generated assembly name macros.
+
+static const DWORD NET452_RELEASE = 379893;
+
+using namespace mscorlib;
+
+extern "C" typedef HRESULT (WINAPI *PFN_CORBINDTOCURRENTRUNTIME)(
+    __in LPCWSTR pwszFileName,
+    __in REFCLSID rclsid,
+    __in REFIID riid,
+    __out LPVOID *ppv
+    );
+
+extern "C" typedef HRESULT(WINAPI *PFN_MBAPREQ_BOOTSTRAPPER_APPLICATION_CREATE)(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    );
+
+static HINSTANCE vhInstance = NULL;
+static ICorRuntimeHost *vpCLRHost = NULL;
+static _AppDomain *vpAppDomain = NULL;
+static HMODULE vhMbapreqModule = NULL;
+
+
+// internal function declarations
+
+static HRESULT GetAppDomain(
+    __out _AppDomain** ppAppDomain
+    );
+static HRESULT GetAppBase(
+    __out LPWSTR* psczAppBase
+    );
+static HRESULT CheckSupportedFrameworks(
+    __in LPCWSTR wzConfigPath
+    );
+static HRESULT UpdateSupportedRuntime(
+    __in IXMLDOMDocument* pixdManifest,
+    __in IXMLDOMNode* pixnSupportedFramework,
+    __out BOOL* pfUpdatedManifest
+    );
+static HRESULT GetCLRHost(
+    __in LPCWSTR wzConfigPath,
+    __out ICorRuntimeHost** ppCLRHost
+    );
+static HRESULT CreateManagedBootstrapperApplication(
+    __in _AppDomain* pAppDomain,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    );
+static HRESULT CreateManagedBootstrapperApplicationFactory(
+    __in _AppDomain* pAppDomain,
+    __out IBootstrapperApplicationFactory** ppAppFactory
+    );
+static HRESULT CreatePrerequisiteBA(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    );
+static HRESULT VerifyNET4RuntimeIsSupported(
+    );
+
+
+// function definitions
+
+extern "C" BOOL WINAPI DllMain(
+    IN HINSTANCE hInstance,
+    IN DWORD dwReason,
+    IN LPVOID /* pvReserved */
+    )
+{
+    switch (dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+        ::DisableThreadLibraryCalls(hInstance);
+        vhInstance = hInstance;
+        break;
+
+    case DLL_PROCESS_DETACH:
+        vhInstance = NULL;
+        break;
+    }
+
+    return TRUE;
+}
+
+// Note: This function assumes that COM was already initialized on the thread.
+extern "C" HRESULT WINAPI BootstrapperApplicationCreate(
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK; 
+    HRESULT hrHostInitialization = S_OK;
+    IBootstrapperEngine* pEngine = NULL;
+
+    hr = BalInitializeFromCreateArgs(pArgs, &pEngine);
+    ExitOnFailure(hr, "Failed to initialize Bal.");
+
+    hr = GetAppDomain(&vpAppDomain);
+    if (SUCCEEDED(hr))
+    {
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Loading managed bootstrapper application.");
+
+        hr = CreateManagedBootstrapperApplication(vpAppDomain, pArgs, pResults);
+        BalExitOnFailure(hr, "Failed to create the managed bootstrapper application.");
+    }
+    else // fallback to the prerequisite BA.
+    {
+        if (E_MBAHOST_NET452_ON_WIN7RTM == hr)
+        {
+            BalLogError(hr, "The Burn engine cannot run with an MBA under the .NET 4 CLR on Windows 7 RTM with .NET 4.5.2 (or greater) installed.");
+            hrHostInitialization = hr;
+        }
+        else
+        {
+            hrHostInitialization = S_OK;
+        }
+
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Loading prerequisite bootstrapper application because managed host could not be loaded, error: 0x%08x.", hr);
+
+        hr = CreatePrerequisiteBA(hrHostInitialization, pEngine, pArgs, pResults);
+        BalExitOnFailure(hr, "Failed to create the pre-requisite bootstrapper application.");
+    }
+
+LExit:
+    ReleaseNullObject(pEngine);
+
+    return hr;
+}
+
+extern "C" void WINAPI BootstrapperApplicationDestroy()
+{
+    if (vpAppDomain)
+    {
+        HRESULT hr = vpCLRHost->UnloadDomain(vpAppDomain);
+        if (FAILED(hr))
+        {
+            BalLogError(hr, "Failed to unload app domain.");
+        }
+
+        vpAppDomain->Release();
+    }
+
+    if (vpCLRHost)
+    {
+        vpCLRHost->Stop();
+        vpCLRHost->Release();
+    }
+
+    if (vhMbapreqModule)
+    {
+        PFN_BOOTSTRAPPER_APPLICATION_DESTROY pfnDestroy = reinterpret_cast<PFN_BOOTSTRAPPER_APPLICATION_DESTROY>(::GetProcAddress(vhMbapreqModule, "MbaPrereqBootstrapperApplicationDestroy"));
+        if (pfnDestroy)
+        {
+            (*pfnDestroy)();
+        }
+
+        ::FreeLibrary(vhMbapreqModule);
+        vhMbapreqModule = NULL;
+    }
+
+    BalUninitialize();
+}
+
+// Gets the custom AppDomain for loading managed BA.
+static HRESULT GetAppDomain(
+    __out _AppDomain **ppAppDomain
+    )
+{
+    HRESULT hr = S_OK;
+    ICorRuntimeHost *pCLRHost = NULL;
+    IUnknown *pUnk = NULL;
+    LPWSTR sczAppBase = NULL;
+    LPWSTR sczConfigPath = NULL;
+    IAppDomainSetup *pAppDomainSetup;
+    BSTR bstrAppBase = NULL;
+    BSTR bstrConfigPath = NULL;
+
+    hr = GetAppBase(&sczAppBase);
+    ExitOnFailure(hr, "Failed to get the host base path.");
+
+    hr = PathConcat(sczAppBase, MBA_CONFIG_FILE_NAME, &sczConfigPath);
+    ExitOnFailure(hr, "Failed to get the full path to the application configuration file.");
+
+    // Check that the supported framework is installed.
+    hr = CheckSupportedFrameworks(sczConfigPath);
+    ExitOnFailure(hr, "Failed to find supported framework.");
+
+    // Load the CLR.
+    hr = GetCLRHost(sczConfigPath, &pCLRHost);
+    ExitOnFailure(hr, "Failed to create the CLR host.");
+
+    hr = pCLRHost->Start();
+    ExitOnRootFailure(hr, "Failed to start the CLR host.");
+
+    // Create the setup information for a new AppDomain to set the app base and config.
+    hr = pCLRHost->CreateDomainSetup(&pUnk);
+    ExitOnRootFailure(hr, "Failed to create the AppDomainSetup object.");
+
+    hr = pUnk->QueryInterface(__uuidof(IAppDomainSetup), reinterpret_cast<LPVOID*>(&pAppDomainSetup));
+    ExitOnRootFailure(hr, "Failed to query for the IAppDomainSetup interface.");
+    ReleaseNullObject(pUnk);
+
+    // Set properties on the AppDomainSetup object.
+    bstrAppBase = ::SysAllocString(sczAppBase);
+    ExitOnNull(bstrAppBase, hr, E_OUTOFMEMORY, "Failed to allocate the application base path for the AppDomainSetup.");
+
+    hr = pAppDomainSetup->put_ApplicationBase(bstrAppBase);
+    ExitOnRootFailure(hr, "Failed to set the application base path for the AppDomainSetup.");
+
+    bstrConfigPath = ::SysAllocString(sczConfigPath);
+    ExitOnNull(bstrConfigPath, hr, E_OUTOFMEMORY, "Failed to allocate the application configuration file for the AppDomainSetup.");
+
+    hr = pAppDomainSetup->put_ConfigurationFile(bstrConfigPath);
+    ExitOnRootFailure(hr, "Failed to set the configuration file path for the AppDomainSetup.");
+
+    // Create the AppDomain to load the factory type.
+    hr = pCLRHost->CreateDomainEx(L"MBA", pAppDomainSetup, NULL, &pUnk);
+    ExitOnRootFailure(hr, "Failed to create the MBA AppDomain.");
+
+    hr = pUnk->QueryInterface(__uuidof(_AppDomain), reinterpret_cast<LPVOID*>(ppAppDomain));
+    ExitOnRootFailure(hr, "Failed to query for the _AppDomain interface.");
+
+LExit:
+    ReleaseBSTR(bstrConfigPath);
+    ReleaseBSTR(bstrAppBase);
+    ReleaseStr(sczConfigPath);
+    ReleaseStr(sczAppBase);
+    ReleaseNullObject(pUnk);
+    ReleaseNullObject(pCLRHost);
+
+    return hr;
+}
+
+static HRESULT GetAppBase(
+    __out LPWSTR *psczAppBase
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczFullPath = NULL;
+
+    hr = PathForCurrentProcess(&sczFullPath, vhInstance);
+    ExitOnFailure(hr, "Failed to get the full host path.");
+
+    hr = PathGetDirectory(sczFullPath, psczAppBase);
+    ExitOnFailure(hr, "Failed to get the directory of the full process path.");
+
+LExit:
+    ReleaseStr(sczFullPath);
+
+    return hr;
+}
+
+// Checks whether at least one of required supported frameworks is installed via the NETFX registry keys.
+static HRESULT CheckSupportedFrameworks(
+    __in LPCWSTR wzConfigPath
+    )
+{
+    HRESULT hr = S_OK;
+    IXMLDOMDocument* pixdManifest = NULL;
+    IXMLDOMNodeList* pNodeList = NULL;
+    IXMLDOMNode* pNode = NULL;
+    DWORD cSupportedFrameworks = 0;
+    LPWSTR sczSupportedFrameworkVersion = NULL;
+    LPWSTR sczFrameworkRegistryKey = NULL;
+    HKEY hkFramework = NULL;
+    DWORD dwFrameworkInstalled = 0;
+    BOOL fUpdatedManifest = FALSE;
+
+    hr = XmlInitialize();
+    ExitOnFailure(hr, "Failed to initialize XML.");
+
+    hr = XmlLoadDocumentFromFile(wzConfigPath, &pixdManifest);
+    ExitOnFailure(hr, "Failed to load bootstrapper config file from path: %ls", wzConfigPath);
+
+    hr = XmlSelectNodes(pixdManifest, L"/configuration/wix.bootstrapper/host/supportedFramework", &pNodeList);
+    ExitOnFailure(hr, "Failed to select all supportedFramework elements.");
+
+    hr = pNodeList->get_length(reinterpret_cast<long*>(&cSupportedFrameworks));
+    ExitOnFailure(hr, "Failed to get the supported framework count.");
+
+    if (cSupportedFrameworks)
+    {
+        while (S_OK == (hr = XmlNextElement(pNodeList, &pNode, NULL)))
+        {
+            hr = XmlGetAttributeEx(pNode, L"version", &sczSupportedFrameworkVersion);
+            ExitOnFailure(hr, "Failed to get supportedFramework/@version.");
+
+            hr = StrAllocFormatted(&sczFrameworkRegistryKey, L"SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\%ls", sczSupportedFrameworkVersion);
+            ExitOnFailure(hr, "Failed to allocate path to supported framework Install registry key.");
+
+            hr = RegOpen(HKEY_LOCAL_MACHINE, sczFrameworkRegistryKey, KEY_READ, &hkFramework);
+            if (SUCCEEDED(hr))
+            {
+                hr = RegReadNumber(hkFramework, L"Install", &dwFrameworkInstalled);
+                if (dwFrameworkInstalled)
+                {
+                    hr = S_OK;
+                    break;
+                }
+            }
+
+            ReleaseNullObject(pNode);
+        }
+
+        // If we looped through all the supported frameworks but didn't find anything, ensure we return a failure.
+        if (S_FALSE == hr)
+        {
+            hr = E_NOTFOUND;
+            ExitOnRootFailure(hr, "Failed to find a supported framework.");
+        }
+
+        hr = UpdateSupportedRuntime(pixdManifest, pNode, &fUpdatedManifest);
+        ExitOnFailure(hr, "Failed to update supportedRuntime.");
+    }
+    // else no supported frameworks specified, so the startup/supportedRuntime must be enough.
+
+    if (fUpdatedManifest)
+    {
+        hr = XmlSaveDocument(pixdManifest, wzConfigPath);
+        ExitOnFailure(hr, "Failed to save updated manifest over config file: %ls", wzConfigPath);
+    }
+
+LExit:
+    ReleaseRegKey(hkFramework);
+    ReleaseStr(sczFrameworkRegistryKey);
+    ReleaseStr(sczSupportedFrameworkVersion);
+    ReleaseObject(pNode);
+    ReleaseObject(pNodeList);
+    ReleaseObject(pixdManifest);
+
+    XmlUninitialize();
+
+    return hr;
+}
+
+// Fixes the supportedRuntime element if necessary.
+static HRESULT UpdateSupportedRuntime(
+    __in IXMLDOMDocument* pixdManifest,
+    __in IXMLDOMNode* pixnSupportedFramework,
+    __out BOOL* pfUpdatedManifest
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczSupportedRuntimeVersion = NULL;
+    IXMLDOMNode* pixnStartup = NULL;
+    IXMLDOMNode* pixnSupportedRuntime = NULL;
+
+    *pfUpdatedManifest = FALSE;
+
+    // If the runtime version attribute is not specified, don't update the manifest.
+    hr = XmlGetAttributeEx(pixnSupportedFramework, L"runtimeVersion", &sczSupportedRuntimeVersion);
+    if (E_NOTFOUND == hr)
+    {
+        ExitFunction1(hr = S_OK);
+    }
+    ExitOnFailure(hr, "Failed to get supportedFramework/@runtimeVersion.");
+
+    // Get the startup element. Fail if we can't find it since it'll be necessary to load the
+    // correct runtime.
+    hr = XmlSelectSingleNode(pixdManifest, L"/configuration/startup", &pixnStartup);
+    ExitOnFailure(hr, "Failed to get startup element.");
+
+    if (S_FALSE == hr)
+    {
+        hr = E_NOTFOUND;
+        ExitOnRootFailure(hr, "Failed to find startup element in bootstrapper application config.");
+    }
+
+    // Remove any pre-existing supported runtimes because they'll just get in the way and create our new one.
+    hr = XmlRemoveChildren(pixnStartup, L"supportedRuntime");
+    ExitOnFailure(hr, "Failed to remove pre-existing supportedRuntime elements.");
+
+    hr = XmlCreateChild(pixnStartup, L"supportedRuntime", &pixnSupportedRuntime);
+    ExitOnFailure(hr, "Failed to create supportedRuntime element.");
+
+    hr = XmlSetAttribute(pixnSupportedRuntime, L"version", sczSupportedRuntimeVersion);
+    ExitOnFailure(hr, "Failed to set supportedRuntime/@version to '%ls'.", sczSupportedRuntimeVersion);
+
+    *pfUpdatedManifest = TRUE;
+
+LExit:
+    ReleaseObject(pixnSupportedRuntime);
+    ReleaseObject(pixnStartup);
+    ReleaseStr(sczSupportedRuntimeVersion);
+
+    return hr;
+}
+
+// Gets the CLR host and caches it.
+static HRESULT GetCLRHost(
+    __in LPCWSTR wzConfigPath,
+    __out ICorRuntimeHost **ppCLRHost
+    )
+{
+    HRESULT hr = S_OK;
+    UINT uiMode = 0;
+    HMODULE hModule = NULL;
+    BOOL fFallbackToCorBindToCurrentRuntime = TRUE;
+    CLRCreateInstanceFnPtr pfnCLRCreateInstance = NULL;
+    ICLRMetaHostPolicy* pCLRMetaHostPolicy = NULL;
+    IStream* pCfgStream = NULL;
+    LPWSTR pwzVersion = NULL;
+    DWORD cchVersion = 0;
+    DWORD dwConfigFlags = 0;
+    ICLRRuntimeInfo* pCLRRuntimeInfo = NULL;
+    PFN_CORBINDTOCURRENTRUNTIME pfnCorBindToCurrentRuntime = NULL;
+
+    // Always set the error mode because we will always restore it below.
+    uiMode = ::SetErrorMode(0);
+
+    // Cache the CLR host to be shutdown later. This can occur on a different thread.
+    if (!vpCLRHost)
+    {
+        // Disable message boxes from being displayed on error and blocking execution.
+        ::SetErrorMode(uiMode | SEM_FAILCRITICALERRORS);
+
+        hr = LoadSystemLibrary(L"mscoree.dll", &hModule);
+        ExitOnFailure(hr, "Failed to load mscoree.dll");
+
+        pfnCLRCreateInstance = reinterpret_cast<CLRCreateInstanceFnPtr>(::GetProcAddress(hModule, "CLRCreateInstance"));
+        
+        if (pfnCLRCreateInstance)
+        {
+            hr = pfnCLRCreateInstance(CLSID_CLRMetaHostPolicy, IID_ICLRMetaHostPolicy, reinterpret_cast<LPVOID*>(&pCLRMetaHostPolicy));
+            if (E_NOTIMPL != hr)
+            {
+                ExitOnRootFailure(hr, "Failed to create instance of ICLRMetaHostPolicy.");
+
+                fFallbackToCorBindToCurrentRuntime = FALSE;
+            }
+        }
+
+        if (fFallbackToCorBindToCurrentRuntime)
+        {
+            pfnCorBindToCurrentRuntime = reinterpret_cast<PFN_CORBINDTOCURRENTRUNTIME>(::GetProcAddress(hModule, "CorBindToCurrentRuntime"));
+            ExitOnNullWithLastError(pfnCorBindToCurrentRuntime, hr, "Failed to get procedure address for CorBindToCurrentRuntime.");
+
+            hr = pfnCorBindToCurrentRuntime(wzConfigPath, CLSID_CorRuntimeHost, IID_ICorRuntimeHost, reinterpret_cast<LPVOID*>(&vpCLRHost));
+            ExitOnRootFailure(hr, "Failed to create the CLR host using the application configuration file path.");
+        }
+        else
+        {
+
+            hr = SHCreateStreamOnFileEx(wzConfigPath, STGM_READ | STGM_SHARE_DENY_WRITE, 0, FALSE, NULL, &pCfgStream);
+            ExitOnFailure(hr, "Failed to load bootstrapper config file from path: %ls", wzConfigPath);
+
+            hr = pCLRMetaHostPolicy->GetRequestedRuntime(METAHOST_POLICY_HIGHCOMPAT, NULL, pCfgStream, NULL, &cchVersion, NULL, NULL, &dwConfigFlags, IID_ICLRRuntimeInfo, reinterpret_cast<LPVOID*>(&pCLRRuntimeInfo));
+            ExitOnRootFailure(hr, "Failed to get the CLR runtime info using the application configuration file path.");
+
+            // .NET 4 RTM had a bug where it wouldn't set pcchVersion if pwzVersion was NULL.
+            if (!cchVersion)
+            {
+                hr = pCLRRuntimeInfo->GetVersionString(NULL, &cchVersion);
+                if (HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER) != hr)
+                {
+                    ExitOnFailure(hr, "Failed to get the length of the CLR version string.");
+                }
+            }
+
+            hr = StrAlloc(&pwzVersion, cchVersion);
+            ExitOnFailure(hr, "Failed to allocate the CLR version string.");
+
+            hr = pCLRRuntimeInfo->GetVersionString(pwzVersion, &cchVersion);
+            ExitOnFailure(hr, "Failed to get the CLR version string.");
+
+            if (CSTR_EQUAL == CompareString(LOCALE_NEUTRAL, 0, L"v4.0.30319", -1, pwzVersion, cchVersion))
+            {
+                hr = VerifyNET4RuntimeIsSupported();
+                ExitOnFailure(hr, "Found unsupported .NET 4 Runtime.");
+            }
+
+            if (METAHOST_CONFIG_FLAGS_LEGACY_V2_ACTIVATION_POLICY_TRUE == (METAHOST_CONFIG_FLAGS_LEGACY_V2_ACTIVATION_POLICY_MASK & dwConfigFlags))
+            {
+                hr = pCLRRuntimeInfo->BindAsLegacyV2Runtime();
+                ExitOnRootFailure(hr, "Failed to bind as legacy V2 runtime.");
+            }
+
+            hr = pCLRRuntimeInfo->GetInterface(CLSID_CorRuntimeHost, IID_ICorRuntimeHost, reinterpret_cast<LPVOID*>(&vpCLRHost));
+            ExitOnRootFailure(hr, "Failed to get instance of ICorRuntimeHost.");
+
+            // TODO: use ICLRRuntimeHost instead of ICorRuntimeHost on .NET 4 since the former is faster and the latter is deprecated
+            //hr = pCLRRuntimeInfo->GetInterface(CLSID_CLRRuntimeHost, IID_ICLRRuntimeHost, reinterpret_cast<LPVOID*>(&pCLRRuntimeHost));
+            //ExitOnRootFailure(hr, "Failed to get instance of ICLRRuntimeHost.");
+        }
+    }
+
+    vpCLRHost->AddRef();
+    *ppCLRHost = vpCLRHost;
+
+LExit:
+    ReleaseStr(pwzVersion);
+    ReleaseNullObject(pCLRRuntimeInfo);
+    ReleaseNullObject(pCfgStream);
+    ReleaseNullObject(pCLRMetaHostPolicy);
+
+    // Unload the module so it's not in use when we install .NET.
+    if (FAILED(hr))
+    {
+        ::FreeLibrary(hModule);
+    }
+
+    ::SetErrorMode(uiMode); // restore the previous error mode.
+
+    return hr;
+}
+
+// Creates the bootstrapper app and returns it for the engine.
+static HRESULT CreateManagedBootstrapperApplication(
+    __in _AppDomain* pAppDomain,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    IBootstrapperApplicationFactory* pAppFactory = NULL;
+
+    hr = CreateManagedBootstrapperApplicationFactory(pAppDomain, &pAppFactory);
+    ExitOnFailure(hr, "Failed to create the factory to create the bootstrapper application.");
+
+    hr = pAppFactory->Create(pArgs, pResults);
+    ExitOnFailure(hr, "Failed to create the bootstrapper application.");
+
+LExit:
+    ReleaseNullObject(pAppFactory);
+
+    return hr;
+}
+
+// Creates the app factory to create the managed app in the default AppDomain.
+static HRESULT CreateManagedBootstrapperApplicationFactory(
+    __in _AppDomain* pAppDomain,
+    __out IBootstrapperApplicationFactory** ppAppFactory
+    )
+{
+    HRESULT hr = S_OK;
+    BSTR bstrAssemblyName = NULL;
+    BSTR bstrTypeName = NULL;
+    _ObjectHandle* pObj = NULL;
+    VARIANT vtBAFactory;
+
+    ::VariantInit(&vtBAFactory);
+
+    bstrAssemblyName = ::SysAllocString(MBA_ASSEMBLY_FULL_NAME);
+    ExitOnNull(bstrAssemblyName, hr, E_OUTOFMEMORY, "Failed to allocate the full assembly name for the bootstrapper application factory.");
+
+    bstrTypeName = ::SysAllocString(MBA_ENTRY_TYPE);
+    ExitOnNull(bstrTypeName, hr, E_OUTOFMEMORY, "Failed to allocate the full type name for the BA factory.");
+
+    hr = pAppDomain->CreateInstance(bstrAssemblyName, bstrTypeName, &pObj);
+    ExitOnRootFailure(hr, "Failed to create the BA factory object.");
+
+    hr = pObj->Unwrap(&vtBAFactory);
+    ExitOnRootFailure(hr, "Failed to unwrap the BA factory object into the host domain.");
+    ExitOnNull(vtBAFactory.punkVal, hr, E_UNEXPECTED, "The variant did not contain the expected IUnknown pointer.");
+
+    hr = vtBAFactory.punkVal->QueryInterface(__uuidof(IBootstrapperApplicationFactory), reinterpret_cast<LPVOID*>(ppAppFactory));
+    ExitOnRootFailure(hr, "Failed to query for the bootstrapper app factory interface.");
+
+LExit:
+    ReleaseVariant(vtBAFactory);
+    ReleaseNullObject(pObj);
+    ReleaseBSTR(bstrTypeName);
+    ReleaseBSTR(bstrAssemblyName);
+
+    return hr;
+}
+
+static HRESULT CreatePrerequisiteBA(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczMbapreqPath = NULL;
+    HMODULE hModule = NULL;
+
+    hr = PathRelativeToModule(&sczMbapreqPath, L"mbapreq.dll", vhInstance);
+    ExitOnFailure(hr, "Failed to get path to pre-requisite BA.");
+
+    hModule = ::LoadLibraryW(sczMbapreqPath);
+    ExitOnNullWithLastError(hModule, hr, "Failed to load pre-requisite BA DLL.");
+
+    PFN_MBAPREQ_BOOTSTRAPPER_APPLICATION_CREATE pfnCreate = reinterpret_cast<PFN_MBAPREQ_BOOTSTRAPPER_APPLICATION_CREATE>(::GetProcAddress(hModule, "MbaPrereqBootstrapperApplicationCreate"));
+    ExitOnNullWithLastError(pfnCreate, hr, "Failed to get MbaPrereqBootstrapperApplicationCreate entry-point from: %ls", sczMbapreqPath);
+
+    hr = pfnCreate(hrHostInitialization, pEngine, pArgs, pResults);
+    ExitOnFailure(hr, "Failed to create prequisite bootstrapper app.");
+
+    vhMbapreqModule = hModule;
+    hModule = NULL;
+
+LExit:
+    if (hModule)
+    {
+        ::FreeLibrary(hModule);
+    }
+    ReleaseStr(sczMbapreqPath);
+
+    return hr;
+}
+
+static HRESULT VerifyNET4RuntimeIsSupported(
+    )
+{
+    HRESULT hr = S_OK;
+    OS_VERSION osv = OS_VERSION_UNKNOWN;
+    DWORD dwServicePack = 0;
+    HKEY hKey = NULL;
+    DWORD er = ERROR_SUCCESS;
+    DWORD dwRelease = 0;
+    DWORD cchRelease = sizeof(dwRelease);
+
+    OsGetVersion(&osv, &dwServicePack);
+    if (OS_VERSION_WIN7 == osv && 0 == dwServicePack)
+    {
+        hr = RegOpen(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v4\\Full", KEY_QUERY_VALUE, &hKey);
+        if (E_FILENOTFOUND == hr)
+        {
+            ExitFunction1(hr = S_OK);
+        }
+        ExitOnFailure(hr, "Failed to open registry key for .NET 4.");
+
+        er = ::RegQueryValueExW(hKey, L"Release", NULL, NULL, reinterpret_cast<LPBYTE>(&dwRelease), &cchRelease);
+        if (ERROR_FILE_NOT_FOUND == er)
+        {
+            ExitFunction1(hr = S_OK);
+        }
+        ExitOnWin32Error(er, hr, "Failed to get Release value.");
+
+        if (NET452_RELEASE <= dwRelease)
+        {
+            hr = E_MBAHOST_NET452_ON_WIN7RTM;
+        }
+    }
+
+LExit:
+    ReleaseRegKey(hKey);
+
+    return hr;
+}
diff --git a/src/ext/Bal/mbahost/mbahost.def b/src/ext/Bal/mbahost/mbahost.def
new file mode 100644
index 00000000..4488df94
--- /dev/null
+++ b/src/ext/Bal/mbahost/mbahost.def
@@ -0,0 +1,6 @@
+; Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+EXPORTS
+    BootstrapperApplicationCreate
+    BootstrapperApplicationDestroy
diff --git a/src/ext/Bal/mbahost/mbahost.vcxproj b/src/ext/Bal/mbahost/mbahost.vcxproj
new file mode 100644
index 00000000..6457b4e0
--- /dev/null
+++ b/src/ext/Bal/mbahost/mbahost.vcxproj
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" />
+  <Import Project="..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props" Condition="Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" />
+  <Import Project="..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props" Condition="Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" />
+  <Import Project="..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props" Condition="Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" />
+
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{12C87C77-3547-44F8-8134-29BC915CB19D}</ProjectGuid>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <TargetName>mbahost</TargetName>
+    <ProjectModuleDefinitionFile>mbahost.def</ProjectModuleDefinitionFile>
+  </PropertyGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+
+  <PropertyGroup>
+    <ProjectAdditionalLinkLibraries>shlwapi.lib</ProjectAdditionalLinkLibraries>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ClCompile Include="mbahost.cpp" />
+    <ClCompile Include="precomp.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="precomp.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="mbahost.def" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <AdditionalIncludeDirectories>$(BaseOutputPath)obj;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+  </ItemDefinitionGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\WixToolset.Mba.Host\WixToolset.Mba.Host.csproj">
+      <Project>{f2ba1935-70fa-4156-b161-fd03850b4faa}</Project>
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+      <SkipGetTargetFrameworkProperties>true</SkipGetTargetFrameworkProperties>
+    </ProjectReference>
+  </ItemGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" />
+  <Import Project="..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props'))" />
+  </Target>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/mbahost/packages.config b/src/ext/Bal/mbahost/packages.config
new file mode 100644
index 00000000..071284ac
--- /dev/null
+++ b/src/ext/Bal/mbahost/packages.config
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Build.Tasks.Git" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.Common" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.GitHub" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Nerdbank.GitVersioning" version="3.3.37" targetFramework="native" developmentDependency="true" />
+  <package id="WixToolset.BalUtil" version="4.0.58" targetFramework="native" />
+  <package id="WixToolset.BootstrapperCore.Native" version="4.0.141" targetFramework="native" />
+  <package id="WixToolset.DUtil" version="4.0.72" targetFramework="native" />
+</packages>
\ No newline at end of file
diff --git a/src/ext/Bal/mbahost/precomp.cpp b/src/ext/Bal/mbahost/precomp.cpp
new file mode 100644
index 00000000..37664a1c
--- /dev/null
+++ b/src/ext/Bal/mbahost/precomp.cpp
@@ -0,0 +1,3 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
diff --git a/src/ext/Bal/mbahost/precomp.h b/src/ext/Bal/mbahost/precomp.h
new file mode 100644
index 00000000..d29a23f3
--- /dev/null
+++ b/src/ext/Bal/mbahost/precomp.h
@@ -0,0 +1,25 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+#include <windows.h>
+#include <msiquery.h>
+#include <metahost.h>
+#include <shlwapi.h>
+
+#import <mscorlib.tlb> raw_interfaces_only rename("ReportEvent", "mscorlib_ReportEvent")
+
+#include <dutil.h>
+#include <osutil.h>
+#include <pathutil.h>
+#include <regutil.h>
+#include <strutil.h>
+#include <xmlutil.h>
+
+#include "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+#include "IBootstrapperApplicationFactory.h"
+
+#include "balutil.h"
diff --git a/src/ext/Bal/nuget.config b/src/ext/Bal/nuget.config
new file mode 100644
index 00000000..f3277bc4
--- /dev/null
+++ b/src/ext/Bal/nuget.config
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="wixtoolset-burn" value="https://ci.appveyor.com/nuget/wixtoolset-burn" />
+    <add key="wixtoolset-data" value="https://ci.appveyor.com/nuget/wixtoolset-data" />
+    <add key="wixtoolset-extensibility" value="https://ci.appveyor.com/nuget/wixtoolset-extensibility" />
+    <add key="wixtoolset-core" value="https://ci.appveyor.com/nuget/wixtoolset-core" />
+    <add key="wixtoolset-core-native" value="https://ci.appveyor.com/nuget/wixtoolset-core-native" />
+    <add key="wixtoolset-dtf" value="https://ci.appveyor.com/nuget/wixtoolset-dtf" />
+    <add key="wixtoolset-balutil" value="https://ci.appveyor.com/nuget/wixtoolset-balutil" />
+    <add key="wixtoolset-dutil" value="https://ci.appveyor.com/nuget/wixtoolset-dutil" />
+    <add key="wixtoolset-netfx-wixext" value="https://ci.appveyor.com/nuget/wixtoolset-netfx-wixext" />
+    <add key="wixtoolset-wcautil" value="https://ci.appveyor.com/nuget/wixtoolset-wcautil" />
+    <add key="wixtoolset-tools" value="https://ci.appveyor.com/nuget/wixtoolset-tools" />
+    <add key="wixbuildtools" value="https://ci.appveyor.com/nuget/wixbuildtools" />
+    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
+</configuration>
\ No newline at end of file
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/BalExtensionFixture.cs b/src/ext/Bal/test/WixToolsetTest.Bal/BalExtensionFixture.cs
new file mode 100644
index 00000000..2ff57c55
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/BalExtensionFixture.cs
@@ -0,0 +1,133 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.Bal
+{
+    using System.IO;
+    using System.Linq;
+    using System.Xml;
+    using WixBuildTools.TestSupport;
+    using WixToolset.Core.TestPackage;
+    using Xunit;
+
+    public class BalExtensionFixture
+    {
+        [Fact]
+        public void CanBuildUsingDisplayInternalUICondition()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = Path.Combine(baseFolder, "bin", "test.exe");
+                var bundleSourceFolder = TestData.Get(@"TestData\WixStdBa");
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+                var baFolderPath = Path.Combine(baseFolder, "ba");
+                var extractFolderPath = Path.Combine(baseFolder, "extract");
+
+                var compileResult = WixRunner.Execute(new[]
+                {
+                    "build",
+                    Path.Combine(bundleSourceFolder, "DisplayInternalUIConditionBundle.wxs"),
+                    "-ext", TestData.Get(@"WixToolset.Bal.wixext.dll"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-bindpath", Path.Combine(bundleSourceFolder, "data"),
+                    "-o", bundleFile,
+                });
+                compileResult.AssertSuccess();
+
+                Assert.True(File.Exists(bundleFile));
+
+                var extractResult = BundleExtractor.ExtractBAContainer(null, bundleFile, baFolderPath, extractFolderPath);
+                extractResult.AssertSuccess();
+
+                var balPackageInfos = extractResult.SelectBADataNodes("/ba:BootstrapperApplicationData/ba:WixBalPackageInfo");
+                var balPackageInfo = (XmlNode)Assert.Single(balPackageInfos);
+                Assert.Equal("<WixBalPackageInfo PackageId='test.msi' DisplayInternalUICondition='1' />", balPackageInfo.GetTestXml());
+
+                Assert.True(File.Exists(Path.Combine(baFolderPath, "thm.wxl")));
+            }
+        }
+
+        [Fact]
+        public void CanBuildUsingOverridable()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = Path.Combine(baseFolder, "bin", "test.exe");
+                var bundleSourceFolder = TestData.Get(@"TestData\Overridable");
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+                var baFolderPath = Path.Combine(baseFolder, "ba");
+                var extractFolderPath = Path.Combine(baseFolder, "extract");
+
+                var compileResult = WixRunner.Execute(new[]
+                {
+                    "build",
+                    Path.Combine(bundleSourceFolder, "Bundle.wxs"),
+                    "-ext", TestData.Get(@"WixToolset.Bal.wixext.dll"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-o", bundleFile,
+                });
+                compileResult.AssertSuccess();
+
+                Assert.True(File.Exists(bundleFile));
+
+                var extractResult = BundleExtractor.ExtractBAContainer(null, bundleFile, baFolderPath, extractFolderPath);
+                extractResult.AssertSuccess();
+
+                var balOverridableVariables = extractResult.SelectBADataNodes("/ba:BootstrapperApplicationData/ba:WixStdbaOverridableVariable");
+                var balOverridableVariable = (XmlNode)Assert.Single(balOverridableVariables);
+                Assert.Equal("<WixStdbaOverridableVariable Name='Test1' />", balOverridableVariable.GetTestXml());
+            }
+        }
+
+        [Fact]
+        public void CanBuildUsingWixStdBa()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = Path.Combine(baseFolder, "bin", "test.exe");
+                var bundleSourceFolder = TestData.Get(@"TestData\WixStdBa");
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+
+                var compileResult = WixRunner.Execute(new[]
+                {
+                    "build",
+                    Path.Combine(bundleSourceFolder, "Bundle.wxs"),
+                    "-ext", TestData.Get(@"WixToolset.Bal.wixext.dll"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-o", bundleFile,
+                });
+                compileResult.AssertSuccess();
+
+                Assert.True(File.Exists(bundleFile));
+            }
+        }
+
+        [Fact]
+        public void CantBuildUsingMBAWithNoPrereqs()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = Path.Combine(baseFolder, "bin", "test.exe");
+                var bundleSourceFolder = TestData.Get(@"TestData\MBA");
+                var intermediateFolder = Path.Combine(baseFolder, "obj");
+
+                var compileResult = WixRunner.Execute(new[]
+                {
+                    "build",
+                    Path.Combine(bundleSourceFolder, "Bundle.wxs"),
+                    "-ext", TestData.Get(@"WixToolset.Bal.wixext.dll"),
+                    "-intermediateFolder", intermediateFolder,
+                    "-o", bundleFile,
+                });
+                Assert.Equal(6802, compileResult.ExitCode);
+                Assert.Equal("There must be at least one PrereqPackage when using the ManagedBootstrapperApplicationHost.\nThis is typically done by using the WixNetFxExtension and referencing one of the NetFxAsPrereq package groups.", compileResult.Messages[0].ToString());
+
+                Assert.False(File.Exists(bundleFile));
+                Assert.False(File.Exists(Path.Combine(intermediateFolder, "test.exe")));
+            }
+        }
+    }
+}
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/TestData/MBA/Bundle.wxs b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/MBA/Bundle.wxs
new file mode 100644
index 00000000..ba1aefba
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/MBA/Bundle.wxs
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
+     xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="WixStdBa" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="75D5D534-E177-4689-AAE9-CAC1C39002C2">
+        <BootstrapperApplication>
+            <bal:WixManagedBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage Permanent="yes" DetectCondition="none" SourceFile="runtimes\win-x86\native\wixnative.exe" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/TestData/Overridable/Bundle.wxs b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/Overridable/Bundle.wxs
new file mode 100644
index 00000000..91380c69
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/Overridable/Bundle.wxs
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
+     xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="WixStdBa" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="75D5D534-E177-4689-AAE9-CAC1C39002C2">
+        <BootstrapperApplication>
+            <bal:WixStandardBootstrapperApplication LicenseUrl="http://wixtoolset.org/about/license/" Theme="hyperlinkLicense" />
+        </BootstrapperApplication>
+        <Variable Name="Test1" bal:Overridable="yes" />
+        <Chain>
+            <ExePackage Permanent="yes" DetectCondition="none" SourceFile="runtimes\win-x86\native\wixnative.exe" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Bundle.wxs b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Bundle.wxs
new file mode 100644
index 00000000..c17b53ff
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Bundle.wxs
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
+     xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="WixStdBa" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="75D5D534-E177-4689-AAE9-CAC1C39002C2">
+        <BootstrapperApplication>
+            <bal:WixStandardBootstrapperApplication LicenseUrl="http://wixtoolset.org/about/license/" Theme="hyperlinkLicense" />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage Permanent="yes" DetectCondition="none" SourceFile="runtimes\win-x86\native\wixnative.exe" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Data/test.msi b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Data/test.msi
new file mode 100644
index 00000000..94aacd1a
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/Data/test.msi
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/DisplayInternalUIConditionBundle.wxs b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/DisplayInternalUIConditionBundle.wxs
new file mode 100644
index 00000000..f08cfe6a
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/TestData/WixStdBa/DisplayInternalUIConditionBundle.wxs
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs"
+     xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="WixStdBa" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="75D5D534-E177-4689-AAE9-CAC1C39002C2">
+        <BootstrapperApplication>
+            <bal:WixStandardBootstrapperApplication LicenseUrl="http://wixtoolset.org/about/license/" Theme="hyperlinkLicense" />
+        </BootstrapperApplication>
+        <Chain>
+            <MsiPackage SourceFile="test.msi" bal:DisplayInternalUICondition="1" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.csproj b/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.csproj
new file mode 100644
index 00000000..c9ab4219
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.csproj
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Content Include="TestData\MBA\Bundle.wxs" CopyToOutputDirectory="PreserveNewest" />
+    <Content Include="TestData\Overridable\Bundle.wxs" CopyToOutputDirectory="PreserveNewest" />
+    <Content Include="TestData\WixStdBa\Bundle.wxs" CopyToOutputDirectory="PreserveNewest" />
+    <Content Include="TestData\WixStdBa\Data\test.msi" CopyToOutputDirectory="PreserveNewest" />
+    <Content Include="TestData\WixStdBa\DisplayInternalUIConditionBundle.wxs" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+  <Target Name="CopyExtensions" AfterTargets="Build">
+    <Copy DestinationFolder="$(OutputPath)" SourceFiles="@(WixExtension)" />
+  </Target>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\wixext\WixToolset.Bal.wixext.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixToolset.Core" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.Burn" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.WindowsInstaller" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.TestPackage" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Data" Version="4.0.*" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixBuildTools.TestSupport" Version="4.0.*" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" PrivateAssets="All" />
+  </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.v3.ncrunchproject b/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.v3.ncrunchproject
new file mode 100644
index 00000000..7b5b2139
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.Bal/WixToolsetTest.Bal.v3.ncrunchproject
@@ -0,0 +1,5 @@
+<ProjectConfiguration>
+  <Settings>
+    <CopyReferencedAssembliesToWorkspace>True</CopyReferencedAssembliesToWorkspace>
+  </Settings>
+</ProjectConfiguration>
\ No newline at end of file
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/DncHostFixture.cs b/src/ext/Bal/test/WixToolsetTest.ManagedHost/DncHostFixture.cs
new file mode 100644
index 00000000..af5f2543
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/DncHostFixture.cs
@@ -0,0 +1,209 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.ManagedHost
+{
+    using System.IO;
+    using WixBuildTools.TestSupport;
+    using WixToolset.Core.TestPackage;
+    using Xunit;
+
+    public class DncHostFixture
+    {
+        static readonly string bundleBasePath = TestData.Get("..", "examples");
+
+        [Fact]
+        public void CanLoadFDDEarliestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "EarliestCoreBundleFDD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core FDD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("EarliestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadSCDEarliestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "EarliestCoreBundleSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("EarliestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadTrimmedSCDEarliestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "EarliestCoreBundleTrimmedSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("EarliestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanReloadSCDEarliestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "EarliestCoreBundleSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunReloadEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("EarliestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[4]);
+                Assert.Equal("Reloaded 1 time(s)", logMessages[5]); // dnchost doesn't currently support unloading
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[6]);
+                Assert.Equal("EarliestCoreBA", logMessages[7]);
+                Assert.Equal("Shutdown,Restart,0", logMessages[8]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadFDDLatestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "LatestCoreBundleFDD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core FDD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("LatestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanReloadFDDLatestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "LatestCoreBundleFDD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunReloadEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core FDD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("LatestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+                Assert.Equal("Loading .NET Core FDD bootstrapper application.", logMessages[4]);
+                Assert.Equal("Reloaded 1 time(s)", logMessages[5]); // dnchost doesn't currently support unloading
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[6]);
+                Assert.Equal("LatestCoreBA", logMessages[7]);
+                Assert.Equal("Shutdown,Restart,0", logMessages[8]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadSCDLatestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "LatestCoreBundleSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("LatestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadTrimmedSCDLatestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "LatestCoreBundleTrimmedSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("LatestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanReloadSCDLatestCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "LatestCoreBundleSCD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunReloadEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("LatestCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+                Assert.Equal("Loading .NET Core SCD bootstrapper application.", logMessages[4]);
+                Assert.Equal("Reloaded 1 time(s)", logMessages[5]); // dnchost doesn't currently support unloading
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[6]);
+                Assert.Equal("LatestCoreBA", logMessages[7]);
+                Assert.Equal("Shutdown,Restart,0", logMessages[8]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadFDDWPFCoreMBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "WPFCoreBundleFDD.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading .NET Core FDD bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("WPFCoreBA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+    }
+}
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/MbaHostFixture.cs b/src/ext/Bal/test/WixToolsetTest.ManagedHost/MbaHostFixture.cs
new file mode 100644
index 00000000..dd37ee58
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/MbaHostFixture.cs
@@ -0,0 +1,94 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.ManagedHost
+{
+    using System.IO;
+    using WixBuildTools.TestSupport;
+    using WixToolset.Core.TestPackage;
+    using Xunit;
+
+    public class MbaHostFixture
+    {
+        static readonly string bundleBasePath = TestData.Get("..", "examples");
+
+        [Fact]
+        public void CanLoadFullFramework2MBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "FullFramework2Bundle.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("FullFramework2BA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanLoadFullFramework4MBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "FullFramework4Bundle.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunShutdownEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("FullFramework4BA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+            }
+        }
+
+        [Fact]
+        public void CanReloadFullFramework2MBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "FullFramework2Bundle.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunReloadEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("FullFramework2BA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[4]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[5]);
+                Assert.Equal("FullFramework2BA", logMessages[6]);
+                Assert.Equal("Shutdown,Restart,0", logMessages[7]);
+            }
+        }
+
+        [Fact]
+        public void CanReloadFullFramework4MBA()
+        {
+            using (var fs = new DisposableFileSystem())
+            {
+                var baseFolder = fs.GetFolder();
+                var bundleFile = TestData.Get(bundleBasePath, "FullFramework4Bundle.exe");
+                var testEngine = new TestEngine();
+
+                var result = testEngine.RunReloadEngine(bundleFile, baseFolder);
+                var logMessages = result.Output;
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[0]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[1]);
+                Assert.Equal("FullFramework4BA", logMessages[2]);
+                Assert.Equal("Shutdown,ReloadBootstrapper,0", logMessages[3]);
+                Assert.Equal("Loading managed bootstrapper application.", logMessages[4]);
+                Assert.Equal("Creating BA thread to run asynchronously.", logMessages[5]);
+                Assert.Equal("FullFramework4BA", logMessages[6]);
+                Assert.Equal("Shutdown,Restart,0", logMessages[7]);
+            }
+        }
+    }
+}
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/README.md b/src/ext/Bal/test/WixToolsetTest.ManagedHost/README.md
new file mode 100644
index 00000000..d7e73df2
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/README.md
@@ -0,0 +1,5 @@
+In order to properly test dnchost and mbahost,
+the managed BAs need to be published and a bundle needs to be built for each scenario.
+Making this happen on every build for the solution takes too long,
+so this project relies on manually running appveyor.cmd to publish everything before the tests can be run.
+appveyor.cmd needs to be ran again every time changes are made in other projects.
\ No newline at end of file
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngine.cs b/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngine.cs
new file mode 100644
index 00000000..44538227
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngine.cs
@@ -0,0 +1,74 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.ManagedHost
+{
+    using System.Collections.Generic;
+    using System.Diagnostics;
+    using System.IO;
+    using WixBuildTools.TestSupport;
+    using WixToolset.Core.TestPackage;
+
+    public class TestEngine
+    {
+        private static readonly string TestEngineFile = TestData.Get(@"..\Win32\examples\Example.TestEngine\Example.TestEngine.exe");
+
+        public TestEngineResult RunReloadEngine(string bundleFilePath, string tempFolderPath)
+        {
+            return this.RunTestEngine("reload", bundleFilePath, tempFolderPath);
+        }
+
+        public TestEngineResult RunShutdownEngine(string bundleFilePath, string tempFolderPath)
+        {
+            return this.RunTestEngine("shutdown", bundleFilePath, tempFolderPath);
+        }
+
+        private TestEngineResult RunTestEngine(string engineMode, string bundleFilePath, string tempFolderPath)
+        {
+            var baFolderPath = Path.Combine(tempFolderPath, "ba");
+            var extractFolderPath = Path.Combine(tempFolderPath, "extract");
+            var extractResult = BundleExtractor.ExtractBAContainer(null, bundleFilePath, baFolderPath, extractFolderPath);
+            extractResult.AssertSuccess();
+
+            var args = new string[] {
+                engineMode,
+                '"' + bundleFilePath + '"',
+                '"' + extractResult.GetBAFilePath(baFolderPath) + '"',
+            };
+            return RunProcessCaptureOutput(TestEngineFile, args);
+        }
+
+        private static TestEngineResult RunProcessCaptureOutput(string executablePath, string[] arguments = null, string workingFolder = null)
+        {
+            var startInfo = new ProcessStartInfo(executablePath)
+            {
+                Arguments = string.Join(' ', arguments),
+                CreateNoWindow = true,
+                RedirectStandardError = true,
+                RedirectStandardOutput = true,
+                UseShellExecute = false,
+                WorkingDirectory = workingFolder,
+            };
+
+            var exitCode = 0;
+            var output = new List<string>();
+
+            using (var process = Process.Start(startInfo))
+            {
+                process.OutputDataReceived += (s, e) => { if (e.Data != null) { output.Add(e.Data); } };
+                process.ErrorDataReceived += (s, e) => { if (e.Data != null) { output.Add(e.Data); } };
+
+                process.BeginErrorReadLine();
+                process.BeginOutputReadLine();
+
+                process.WaitForExit();
+                exitCode = process.ExitCode;
+            }
+
+            return new TestEngineResult
+            {
+                ExitCode = exitCode,
+                Output = output,
+            };
+        }
+    }
+}
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngineResult.cs b/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngineResult.cs
new file mode 100644
index 00000000..63f6f7f5
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/TestEngineResult.cs
@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolsetTest.ManagedHost
+{
+    using System.Collections.Generic;
+
+    public class TestEngineResult
+    {
+        public int ExitCode { get; set; }
+        public List<string> Output { get; set; }
+    }
+}
diff --git a/src/ext/Bal/test/WixToolsetTest.ManagedHost/WixToolsetTest.ManagedHost.csproj b/src/ext/Bal/test/WixToolsetTest.ManagedHost/WixToolsetTest.ManagedHost.csproj
new file mode 100644
index 00000000..38c8926c
--- /dev/null
+++ b/src/ext/Bal/test/WixToolsetTest.ManagedHost/WixToolsetTest.ManagedHost.csproj
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\examples\TestEngine\Example.TestEngine.vcxproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixBuildTools.TestSupport" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.Burn" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.WindowsInstaller" Version="4.0.*" />
+    <PackageReference Include="WixToolset.Core.TestPackage" Version="4.0.*" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.3.0" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" PrivateAssets="All" />
+  </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/Directory.Build.props b/src/ext/Bal/test/examples/Directory.Build.props
new file mode 100644
index 00000000..3d5870a5
--- /dev/null
+++ b/src/ext/Bal/test/examples/Directory.Build.props
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project>
+  <Import Project="..\..\Directory.Build.props" />
+  <Import Project="Wix.Build.props" Condition=" '$(MSBuildProjectExtension)'=='.wixproj' " />
+</Project>
diff --git a/src/ext/Bal/test/examples/Directory.Build.targets b/src/ext/Bal/test/examples/Directory.Build.targets
new file mode 100644
index 00000000..6dcf402b
--- /dev/null
+++ b/src/ext/Bal/test/examples/Directory.Build.targets
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project>
+  <Import Project="..\..\Directory.Build.targets" />
+  <Import Project="Wix.Build.targets" Condition=" '$(MSBuildProjectExtension)'=='.wixproj' " />
+</Project>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleFDD/EarliestCoreBundleFDD.wixproj b/src/ext/Bal/test/examples/EarliestCoreBundleFDD/EarliestCoreBundleFDD.wixproj
new file mode 100644
index 00000000..ba75a9ff
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleFDD/EarliestCoreBundleFDD.wixproj
@@ -0,0 +1,2 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" />
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleFDD/FrameworkDependentBundle.wxs b/src/ext/Bal/test/examples/EarliestCoreBundleFDD/FrameworkDependentBundle.wxs
new file mode 100644
index 00000000..d146845c
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleFDD/FrameworkDependentBundle.wxs
@@ -0,0 +1,16 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="FDDEarliestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\Example.EarliestCoreMBA.deps.json" Name="Example.EarliestCoreMBA.deps.json" />
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\Example.EarliestCoreMBA.dll" Name="Example.EarliestCoreMBA.dll" bal:BAFactoryAssembly="yes" />
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\Example.EarliestCoreMBA.pdb" Name="Example.EarliestCoreMBA.pdb" />
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\Example.EarliestCoreMBA.runtimeconfig.json" Name="Example.EarliestCoreMBA.runtimeconfig.json" />
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\mbanative.dll" Name="mbanative.dll" />
+            <Payload SourceFile="publish\Example.EarliestCoreMBA\fdd\WixToolset.Mba.Core.dll" Name="WixToolset.Mba.Core.dll" />
+            <bal:WixDotNetCoreBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" bal:PrereqPackage="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleSCD/EarliestCoreBundleSCD.wixproj b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/EarliestCoreBundleSCD.wixproj
new file mode 100644
index 00000000..ebeebff2
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/EarliestCoreBundleSCD.wixproj
@@ -0,0 +1,10 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+    <ItemGroup>
+        <BindInputPaths Include="$(OutputPath)publish\Example.EarliestCoreMBA\scd" />
+        <HarvestDirectory Include="$(OutputPath)publish\Example.EarliestCoreMBA\scd">
+            <DirectoryRefId>publish.Example.EarliestCoreMBA.scd</DirectoryRefId>
+            <Transforms>ba.xslt</Transforms>
+        </HarvestDirectory>
+    </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleSCD/SelfContainedBundle.wxs b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/SelfContainedBundle.wxs
new file mode 100644
index 00000000..4d872317
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/SelfContainedBundle.wxs
@@ -0,0 +1,11 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="SCDEarliestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <bal:WixDotNetCoreBootstrapperApplicationHost SelfContainedDeployment="yes" />
+            <PayloadGroupRef Id="publish.Example.EarliestCoreMBA.scd" />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" PerMachine="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleSCD/ba.xslt b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/ba.xslt
new file mode 100644
index 00000000..06b84256
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleSCD/ba.xslt
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"
+    xmlns:wix="http://wixtoolset.org/schemas/v4/wxs"
+>
+    <xsl:output method="xml" indent="yes"/>
+
+    <xsl:template match="@* | node()">
+        <xsl:copy>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="wix:Payload[@SourceFile='SourceDir\Example.EarliestCoreMBA.dll']" >
+        <xsl:copy>
+            <xsl:attribute name="BAFactoryAssembly" namespace="http://wixtoolset.org/schemas/v4/wxs/bal">yes</xsl:attribute>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+</xsl:stylesheet>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/EarliestCoreBundleTrimmedSCD.wixproj b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/EarliestCoreBundleTrimmedSCD.wixproj
new file mode 100644
index 00000000..a6b56460
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/EarliestCoreBundleTrimmedSCD.wixproj
@@ -0,0 +1,10 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+    <ItemGroup>
+        <BindInputPaths Include="$(OutputPath)publish\Example.EarliestCoreMBA\trimmedscd" />
+        <HarvestDirectory Include="$(OutputPath)publish\Example.EarliestCoreMBA\trimmedscd">
+            <DirectoryRefId>publish.Example.EarliestCoreMBA.trimmedscd</DirectoryRefId>
+            <Transforms>ba.xslt</Transforms>
+        </HarvestDirectory>
+    </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs
new file mode 100644
index 00000000..ba7dce25
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs
@@ -0,0 +1,11 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="TrimmedSCDEarliestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <bal:WixDotNetCoreBootstrapperApplicationHost SelfContainedDeployment="yes" />
+            <PayloadGroupRef Id="publish.Example.EarliestCoreMBA.trimmedscd" />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" PerMachine="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/ba.xslt b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/ba.xslt
new file mode 100644
index 00000000..06b84256
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreBundleTrimmedSCD/ba.xslt
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"
+    xmlns:wix="http://wixtoolset.org/schemas/v4/wxs"
+>
+    <xsl:output method="xml" indent="yes"/>
+
+    <xsl:template match="@* | node()">
+        <xsl:copy>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="wix:Payload[@SourceFile='SourceDir\Example.EarliestCoreMBA.dll']" >
+        <xsl:copy>
+            <xsl:attribute name="BAFactoryAssembly" namespace="http://wixtoolset.org/schemas/v4/wxs/bal">yes</xsl:attribute>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+</xsl:stylesheet>
diff --git a/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBA.cs b/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBA.cs
new file mode 100644
index 00000000..c9291a7f
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBA.cs
@@ -0,0 +1,34 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.EarliestCoreMBA
+{
+    using WixToolset.Mba.Core;
+
+    public class EarliestCoreBA : BootstrapperApplication
+    {
+        public EarliestCoreBA(IEngine engine)
+            : base(engine)
+        {
+
+        }
+
+        protected override void Run()
+        {
+        }
+
+        protected override void OnStartup(StartupEventArgs args)
+        {
+            base.OnStartup(args);
+
+            this.engine.Log(LogLevel.Standard, nameof(EarliestCoreBA));
+        }
+
+        protected override void OnShutdown(ShutdownEventArgs args)
+        {
+            base.OnShutdown(args);
+
+            var message = "Shutdown," + args.Action.ToString() + "," + args.HResult.ToString();
+            this.engine.Log(LogLevel.Standard, message);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBAFactory.cs b/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBAFactory.cs
new file mode 100644
index 00000000..672e17ee
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreMBA/EarliestCoreBAFactory.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+[assembly: WixToolset.Mba.Core.BootstrapperApplicationFactory(typeof(Example.EarliestCoreMBA.EarliestCoreBAFactory))]
+namespace Example.EarliestCoreMBA
+{
+    using WixToolset.Mba.Core;
+
+    public class EarliestCoreBAFactory : BaseBootstrapperApplicationFactory
+    {
+        private static int loadCount = 0;
+
+        protected override IBootstrapperApplication Create(IEngine engine, IBootstrapperCommand bootstrapperCommand)
+        {
+            if (loadCount > 0)
+            {
+                engine.Log(LogLevel.Standard, $"Reloaded {loadCount} time(s)");
+            }
+            ++loadCount;
+            return new EarliestCoreBA(engine);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj b/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj
new file mode 100644
index 00000000..cb66c138
--- /dev/null
+++ b/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+    <Description>Earliest .NET Core MBA</Description>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <TrimmerRootAssembly Include="System.Runtime.Loader" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/FullFramework2Bundle/Bundle.wxs b/src/ext/Bal/test/examples/FullFramework2Bundle/Bundle.wxs
new file mode 100644
index 00000000..f0af975c
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2Bundle/Bundle.wxs
@@ -0,0 +1,14 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="FullFramework2MBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <Payload SourceFile="Example.FullFramework2MBA\net20\win-x86\Example.FullFramework2MBA.dll" />
+            <Payload SourceFile="Example.FullFramework2MBA\net20\win-x86\mbanative.dll" />
+            <Payload SourceFile="Example.FullFramework2MBA\net20\win-x86\WixToolset.Mba.Core.dll" />
+            <Payload SourceFile="Example.FullFramework2MBA\net20\win-x86\WixToolset.Mba.Host.config" />
+            <bal:WixManagedBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" bal:PrereqPackage="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/FullFramework2Bundle/FullFramework2Bundle.wixproj b/src/ext/Bal/test/examples/FullFramework2Bundle/FullFramework2Bundle.wixproj
new file mode 100644
index 00000000..ba75a9ff
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2Bundle/FullFramework2Bundle.wixproj
@@ -0,0 +1,2 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" />
diff --git a/src/ext/Bal/test/examples/FullFramework2MBA/Example.FullFramework2MBA.csproj b/src/ext/Bal/test/examples/FullFramework2MBA/Example.FullFramework2MBA.csproj
new file mode 100644
index 00000000..21079ed1
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2MBA/Example.FullFramework2MBA.csproj
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net20</TargetFramework>
+    <AssemblyName>Example.FullFramework2MBA</AssemblyName>
+    <RootNamespace>Example.FullFramework2MBA</RootNamespace>
+    <DebugType>embedded</DebugType>
+    <RuntimeIdentifier>win-x86</RuntimeIdentifier>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Content Include="WixToolset.Mba.Host.config" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BA.cs b/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BA.cs
new file mode 100644
index 00000000..32cd19c8
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BA.cs
@@ -0,0 +1,34 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.FullFramework2MBA
+{
+    using WixToolset.Mba.Core;
+
+    public class FullFramework2BA : BootstrapperApplication
+    {
+        public FullFramework2BA(IEngine engine)
+            : base(engine)
+        {
+
+        }
+
+        protected override void Run()
+        {
+        }
+
+        protected override void OnStartup(StartupEventArgs args)
+        {
+            base.OnStartup(args);
+
+            this.engine.Log(LogLevel.Standard, nameof(FullFramework2BA));
+        }
+
+        protected override void OnShutdown(ShutdownEventArgs args)
+        {
+            base.OnShutdown(args);
+
+            var message = "Shutdown," + args.Action.ToString() + "," + args.HResult.ToString();
+            this.engine.Log(LogLevel.Standard, message);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BAFactory.cs b/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BAFactory.cs
new file mode 100644
index 00000000..647c2040
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2MBA/FullFramework2BAFactory.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+[assembly: WixToolset.Mba.Core.BootstrapperApplicationFactory(typeof(Example.FullFramework2MBA.FullFramework2BAFactory))]
+namespace Example.FullFramework2MBA
+{
+    using WixToolset.Mba.Core;
+
+    public class FullFramework2BAFactory : BaseBootstrapperApplicationFactory
+    {
+        private static int loadCount = 0;
+
+        protected override IBootstrapperApplication Create(IEngine engine, IBootstrapperCommand bootstrapperCommand)
+        {
+            if (loadCount > 0)
+            {
+                engine.Log(LogLevel.Standard, $"Reloaded {loadCount} time(s)");
+            }
+            ++loadCount;
+            return new FullFramework2BA(engine);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/FullFramework2MBA/WixToolset.Mba.Host.config b/src/ext/Bal/test/examples/FullFramework2MBA/WixToolset.Mba.Host.config
new file mode 100644
index 00000000..be450a4f
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework2MBA/WixToolset.Mba.Host.config
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<configuration>
+    <configSections>
+        <sectionGroup name="wix.bootstrapper" type="WixToolset.Mba.Host.BootstrapperSectionGroup, WixToolset.Mba.Host">
+            <section name="host" type="WixToolset.Mba.Host.HostSection, WixToolset.Mba.Host" />
+        </sectionGroup>
+    </configSections>
+    <startup>
+        <supportedRuntime version="v2.0.50727" />
+    </startup>
+    <wix.bootstrapper>
+
+        <host assemblyName="Example.FullFramework2MBA">
+            <supportedFramework version="v3.5" />
+        </host>
+    </wix.bootstrapper>
+</configuration>
diff --git a/src/ext/Bal/test/examples/FullFramework4Bundle/Bundle.wxs b/src/ext/Bal/test/examples/FullFramework4Bundle/Bundle.wxs
new file mode 100644
index 00000000..7b7cbf57
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4Bundle/Bundle.wxs
@@ -0,0 +1,14 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="FullFramework4MBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="E08068E0-4FBA-439D-A1C8-4CD1FE27093F">
+        <BootstrapperApplication>
+            <Payload SourceFile="Example.FullFramework4MBA\net48\win-x86\Example.FullFramework4MBA.dll" />
+            <Payload SourceFile="Example.FullFramework4MBA\net48\win-x86\mbanative.dll" />
+            <Payload SourceFile="Example.FullFramework4MBA\net48\win-x86\WixToolset.Mba.Core.dll" />
+            <Payload SourceFile="Example.FullFramework4MBA\net48\win-x86\WixToolset.Mba.Host.config" />
+            <bal:WixManagedBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" bal:PrereqPackage="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/FullFramework4Bundle/FullFramework4Bundle.wixproj b/src/ext/Bal/test/examples/FullFramework4Bundle/FullFramework4Bundle.wixproj
new file mode 100644
index 00000000..ba75a9ff
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4Bundle/FullFramework4Bundle.wixproj
@@ -0,0 +1,2 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" />
diff --git a/src/ext/Bal/test/examples/FullFramework4MBA/Example.FullFramework4MBA.csproj b/src/ext/Bal/test/examples/FullFramework4MBA/Example.FullFramework4MBA.csproj
new file mode 100644
index 00000000..a05e7888
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4MBA/Example.FullFramework4MBA.csproj
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net48</TargetFramework>
+    <Description>Full Framework v4 MBA</Description>
+    <RuntimeIdentifier>win-x86</RuntimeIdentifier>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" PrivateAssets="All" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="WixToolset.Mba.Host.config" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BA.cs b/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BA.cs
new file mode 100644
index 00000000..8ee3bd19
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BA.cs
@@ -0,0 +1,34 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.FullFramework4MBA
+{
+    using WixToolset.Mba.Core;
+
+    public class FullFramework4BA : BootstrapperApplication
+    {
+        public FullFramework4BA(IEngine engine)
+            : base(engine)
+        {
+
+        }
+
+        protected override void Run()
+        {
+        }
+
+        protected override void OnStartup(StartupEventArgs args)
+        {
+            base.OnStartup(args);
+
+            this.engine.Log(LogLevel.Standard, nameof(FullFramework4BA));
+        }
+
+        protected override void OnShutdown(ShutdownEventArgs args)
+        {
+            base.OnShutdown(args);
+
+            var message = "Shutdown," + args.Action.ToString() + "," + args.HResult.ToString();
+            this.engine.Log(LogLevel.Standard, message);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BAFactory.cs b/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BAFactory.cs
new file mode 100644
index 00000000..6a571a54
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4MBA/FullFramework4BAFactory.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+[assembly: WixToolset.Mba.Core.BootstrapperApplicationFactory(typeof(Example.FullFramework4MBA.FullFramework4BAFactory))]
+namespace Example.FullFramework4MBA
+{
+    using WixToolset.Mba.Core;
+
+    public class FullFramework4BAFactory : BaseBootstrapperApplicationFactory
+    {
+        private static int loadCount = 0;
+
+        protected override IBootstrapperApplication Create(IEngine engine, IBootstrapperCommand bootstrapperCommand)
+        {
+            if (loadCount > 0)
+            {
+                engine.Log(LogLevel.Standard, $"Reloaded {loadCount} time(s)");
+            }
+            ++loadCount;
+            return new FullFramework4BA(engine);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/FullFramework4MBA/WixToolset.Mba.Host.config b/src/ext/Bal/test/examples/FullFramework4MBA/WixToolset.Mba.Host.config
new file mode 100644
index 00000000..96678cda
--- /dev/null
+++ b/src/ext/Bal/test/examples/FullFramework4MBA/WixToolset.Mba.Host.config
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<configuration>
+    <configSections>
+        <sectionGroup name="wix.bootstrapper" type="WixToolset.Mba.Host.BootstrapperSectionGroup, WixToolset.Mba.Host">
+            <section name="host" type="WixToolset.Mba.Host.HostSection, WixToolset.Mba.Host" />
+        </sectionGroup>
+    </configSections>
+    <startup>
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
+    </startup>
+    <wix.bootstrapper>
+        <host assemblyName="Example.FullFramework4MBA" />
+    </wix.bootstrapper>
+</configuration>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleFDD/FrameworkDependentBundle.wxs b/src/ext/Bal/test/examples/LatestCoreBundleFDD/FrameworkDependentBundle.wxs
new file mode 100644
index 00000000..d5b543e8
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleFDD/FrameworkDependentBundle.wxs
@@ -0,0 +1,16 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="FDDLatestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\Example.LatestCoreMBA.deps.json" Name="Example.LatestCoreMBA.deps.json" />
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\Example.LatestCoreMBA.dll" Name="Example.LatestCoreMBA.dll" bal:BAFactoryAssembly="yes" />
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\Example.LatestCoreMBA.pdb" Name="Example.LatestCoreMBA.pdb" />
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\Example.LatestCoreMBA.runtimeconfig.json" Name="Example.LatestCoreMBA.runtimeconfig.json" />
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\mbanative.dll" Name="mbanative.dll" />
+            <Payload SourceFile="publish\Example.LatestCoreMBA\fdd\WixToolset.Mba.Core.dll" Name="WixToolset.Mba.Core.dll" />
+            <bal:WixDotNetCoreBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" bal:PrereqPackage="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleFDD/LatestCoreBundleFDD.wixproj b/src/ext/Bal/test/examples/LatestCoreBundleFDD/LatestCoreBundleFDD.wixproj
new file mode 100644
index 00000000..ba75a9ff
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleFDD/LatestCoreBundleFDD.wixproj
@@ -0,0 +1,2 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" />
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleSCD/LatestCoreBundleSCD.wixproj b/src/ext/Bal/test/examples/LatestCoreBundleSCD/LatestCoreBundleSCD.wixproj
new file mode 100644
index 00000000..30a860ab
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleSCD/LatestCoreBundleSCD.wixproj
@@ -0,0 +1,10 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+    <ItemGroup>
+        <BindInputPaths Include="$(OutputPath)publish\Example.LatestCoreMBA\scd" />
+        <HarvestDirectory Include="$(OutputPath)publish\Example.LatestCoreMBA\scd">
+            <DirectoryRefId>publish.Example.LatestCoreMBA.scd</DirectoryRefId>
+            <Transforms>ba.xslt</Transforms>
+        </HarvestDirectory>
+    </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleSCD/SelfContainedBundle.wxs b/src/ext/Bal/test/examples/LatestCoreBundleSCD/SelfContainedBundle.wxs
new file mode 100644
index 00000000..bedf0326
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleSCD/SelfContainedBundle.wxs
@@ -0,0 +1,11 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="SCDLatestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <bal:WixDotNetCoreBootstrapperApplicationHost SelfContainedDeployment="yes" />
+            <PayloadGroupRef Id="publish.Example.LatestCoreMBA.scd" />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" PerMachine="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleSCD/ba.xslt b/src/ext/Bal/test/examples/LatestCoreBundleSCD/ba.xslt
new file mode 100644
index 00000000..acc7474c
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleSCD/ba.xslt
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"
+    xmlns:wix="http://wixtoolset.org/schemas/v4/wxs"
+>
+    <xsl:output method="xml" indent="yes"/>
+
+    <xsl:template match="@* | node()">
+        <xsl:copy>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="wix:Payload[@SourceFile='SourceDir\Example.LatestCoreMBA.dll']" >
+        <xsl:copy>
+            <xsl:attribute name="BAFactoryAssembly" namespace="http://wixtoolset.org/schemas/v4/wxs/bal">yes</xsl:attribute>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+</xsl:stylesheet>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/LatestCoreBundleTrimmedSCD.wixproj b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/LatestCoreBundleTrimmedSCD.wixproj
new file mode 100644
index 00000000..5ce89b64
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/LatestCoreBundleTrimmedSCD.wixproj
@@ -0,0 +1,10 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+    <ItemGroup>
+        <BindInputPaths Include="$(OutputPath)publish\Example.LatestCoreMBA\trimmedscd" />
+        <HarvestDirectory Include="$(OutputPath)publish\Example.LatestCoreMBA\trimmedscd">
+            <DirectoryRefId>publish.Example.LatestCoreMBA.trimmedscd</DirectoryRefId>
+            <Transforms>ba.xslt</Transforms>
+        </HarvestDirectory>
+    </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs
new file mode 100644
index 00000000..6059f8c1
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/TrimmedSelfContainedBundle.wxs
@@ -0,0 +1,11 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="TrimmedSCDLatestCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <bal:WixDotNetCoreBootstrapperApplicationHost SelfContainedDeployment="yes" />
+            <PayloadGroupRef Id="publish.Example.LatestCoreMBA.trimmedscd" />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" PerMachine="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/ba.xslt b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/ba.xslt
new file mode 100644
index 00000000..acc7474c
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreBundleTrimmedSCD/ba.xslt
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"
+    xmlns:wix="http://wixtoolset.org/schemas/v4/wxs"
+>
+    <xsl:output method="xml" indent="yes"/>
+
+    <xsl:template match="@* | node()">
+        <xsl:copy>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+
+    <xsl:template match="wix:Payload[@SourceFile='SourceDir\Example.LatestCoreMBA.dll']" >
+        <xsl:copy>
+            <xsl:attribute name="BAFactoryAssembly" namespace="http://wixtoolset.org/schemas/v4/wxs/bal">yes</xsl:attribute>
+            <xsl:apply-templates select="@* | node()"/>
+        </xsl:copy>
+    </xsl:template>
+</xsl:stylesheet>
diff --git a/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj b/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj
new file mode 100644
index 00000000..9f3f02d9
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+    <Description>Latest .NET Core MBA</Description>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <TrimmerRootAssembly Include="System.Diagnostics.Tools" />
+    <TrimmerRootAssembly Include="System.Runtime" />
+    <TrimmerRootAssembly Include="System.Runtime.InteropServices" />
+    <TrimmerRootAssembly Include="System.Runtime.Loader" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBA.cs b/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBA.cs
new file mode 100644
index 00000000..50386a87
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBA.cs
@@ -0,0 +1,33 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.LatestCoreMBA
+{
+    using WixToolset.Mba.Core;
+
+    public class LatestCoreBA : BootstrapperApplication
+    {
+        public LatestCoreBA(IEngine engine)
+            : base(engine)
+        {
+        }
+
+        protected override void Run()
+        {
+        }
+
+        protected override void OnStartup(StartupEventArgs args)
+        {
+            base.OnStartup(args);
+
+            this.engine.Log(LogLevel.Standard, nameof(LatestCoreBA));
+        }
+
+        protected override void OnShutdown(ShutdownEventArgs args)
+        {
+            base.OnShutdown(args);
+
+            var message = "Shutdown," + args.Action.ToString() + "," + args.HResult.ToString();
+            this.engine.Log(LogLevel.Standard, message);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBAFactory.cs b/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBAFactory.cs
new file mode 100644
index 00000000..fff3b5c5
--- /dev/null
+++ b/src/ext/Bal/test/examples/LatestCoreMBA/LatestCoreBAFactory.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+[assembly: WixToolset.Mba.Core.BootstrapperApplicationFactory(typeof(Example.LatestCoreMBA.LatestCoreBAFactory))]
+namespace Example.LatestCoreMBA
+{
+    using WixToolset.Mba.Core;
+
+    public class LatestCoreBAFactory : BaseBootstrapperApplicationFactory
+    {
+        private static int loadCount = 0;
+
+        protected override IBootstrapperApplication Create(IEngine engine, IBootstrapperCommand bootstrapperCommand)
+        {
+            if (loadCount > 0)
+            {
+                engine.Log(LogLevel.Standard, $"Reloaded {loadCount} time(s)");
+            }
+            ++loadCount;
+            return new LatestCoreBA(engine);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/Example.TestEngine.vcxproj b/src/ext/Bal/test/examples/TestEngine/Example.TestEngine.vcxproj
new file mode 100644
index 00000000..99eb917e
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/Example.TestEngine.vcxproj
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props" Condition="Exists('..\..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" />
+  <Import Project="..\..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props" Condition="Exists('..\..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" />
+  <Import Project="..\..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props" Condition="Exists('..\..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{3D44B67D-A475-49BA-8310-E39F6C117CC9}</ProjectGuid>
+    <ConfigurationType>Application</ConfigurationType>
+    <ProjectSubSystem>Console</ProjectSubSystem>
+    <TargetName>Example.TestEngine</TargetName>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+    <Import Project="..\..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" />
+  </ImportGroup>
+  <PropertyGroup>
+    <ProjectAdditionalLinkLibraries>
+    </ProjectAdditionalLinkLibraries>
+  </PropertyGroup>
+  <ItemGroup>
+    <ClCompile Include="precomp.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+    <ClCompile Include="ReloadEngine.cpp" />
+    <ClCompile Include="ShutdownEngine.cpp" />
+    <ClCompile Include="ExampleTestEngine.cpp" />
+    <ClCompile Include="TestEngine.cpp" />
+    <ClCompile Include="WaitForQuitEngine.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="precomp.h" />
+    <ClInclude Include="ReloadEngine.h" />
+    <ClInclude Include="ShutdownEngine.h" />
+    <ClInclude Include="TestEngine.h" />
+    <ClInclude Include="WaitForQuitEngine.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props'))" />
+    <Error Condition="!Exists('..\..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props'))" />
+    <Error Condition="!Exists('..\..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props'))" />
+  </Target>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/TestEngine/ExampleTestEngine.cpp b/src/ext/Bal/test/examples/TestEngine/ExampleTestEngine.cpp
new file mode 100644
index 00000000..fc1938fe
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/ExampleTestEngine.cpp
@@ -0,0 +1,53 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+int __cdecl wmain(int argc, LPWSTR argv[])
+{
+    HRESULT hr = S_OK;
+    BOOL fComInitialized = FALSE;
+    BOOL fShowUsage = FALSE;
+
+    // initialize COM
+    hr = ::CoInitializeEx(NULL, COINIT_MULTITHREADED);
+    ExitOnFailure(hr, "Failed to initialize COM.");
+    fComInitialized = TRUE;
+
+    ConsoleInitialize();
+
+    if (argc != 4)
+    {
+        fShowUsage = TRUE;
+    }
+    else if (CSTR_EQUAL == ::CompareString(LOCALE_INVARIANT, NORM_IGNORECASE, argv[1], -1, L"reload", -1))
+    {
+        hr = RunReloadEngine(argv[2], argv[3]);
+    }
+    else if (CSTR_EQUAL == ::CompareString(LOCALE_INVARIANT, NORM_IGNORECASE, argv[1], -1, L"shutdown", -1))
+    {
+        hr = RunShutdownEngine(argv[2], argv[3]);
+    }
+    else if (CSTR_EQUAL == ::CompareString(LOCALE_INVARIANT, NORM_IGNORECASE, argv[1], -1, L"waitforquit", -1))
+    {
+        hr = RunWaitForQuitEngine(argv[2], argv[3]);
+    }
+    else
+    {
+        fShowUsage = TRUE;
+    }
+
+    if (fShowUsage)
+    {
+        ConsoleWriteError(hr = E_INVALIDARG, CONSOLE_COLOR_RED, "Usage: Example.TestEngine.exe {reload|shutdown|waitforquit} Bundle.exe BA.dll");
+    }
+
+    ConsoleUninitialize();
+
+LExit:
+    if (fComInitialized)
+    {
+        ::CoUninitialize();
+    }
+
+    return hr;
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/ReloadEngine.cpp b/src/ext/Bal/test/examples/TestEngine/ReloadEngine.cpp
new file mode 100644
index 00000000..46fd9afa
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/ReloadEngine.cpp
@@ -0,0 +1,55 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+HRESULT RunReloadEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    )
+{
+    HRESULT hr = S_OK;
+    TestEngine* pTestEngine = NULL;
+
+    pTestEngine = new TestEngine();
+    ConsoleExitOnNull(pTestEngine, hr, E_OUTOFMEMORY, CONSOLE_COLOR_RED, "Failed to create new test engine.");
+
+    hr = pTestEngine->Initialize(wzBundleFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to initialize engine.");
+
+    hr = pTestEngine->LoadBA(wzBAFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to load BA.");
+
+    hr = pTestEngine->SendStartupEvent();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnStartup.");
+
+    hr = pTestEngine->SimulateQuit(0);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to simulate quit.");
+
+    hr = pTestEngine->RunApplication();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to run engine.");
+
+    hr = pTestEngine->SendShutdownEvent(BOOTSTRAPPER_SHUTDOWN_ACTION_RELOAD_BOOTSTRAPPER);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnShutdown.");
+
+    pTestEngine->UnloadBA();
+
+    hr = pTestEngine->LoadBA(wzBAFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to load BA.");
+
+    hr = pTestEngine->SendStartupEvent();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnStartup.");
+
+    hr = pTestEngine->SimulateQuit(0);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to simulate quit.");
+
+    hr = pTestEngine->RunApplication();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to run engine.");
+
+    hr = pTestEngine->SendShutdownEvent(BOOTSTRAPPER_SHUTDOWN_ACTION_RESTART);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnShutdown.");
+
+    pTestEngine->UnloadBA();
+
+LExit:
+    return hr;
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/ReloadEngine.h b/src/ext/Bal/test/examples/TestEngine/ReloadEngine.h
new file mode 100644
index 00000000..0e8456af
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/ReloadEngine.h
@@ -0,0 +1,8 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+HRESULT RunReloadEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    );
diff --git a/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.cpp b/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.cpp
new file mode 100644
index 00000000..3b876e4e
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.cpp
@@ -0,0 +1,38 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+HRESULT RunShutdownEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    )
+{
+    HRESULT hr = S_OK;
+    TestEngine* pTestEngine = NULL;
+
+    pTestEngine = new TestEngine();
+    ConsoleExitOnNull(pTestEngine, hr, E_OUTOFMEMORY, CONSOLE_COLOR_RED, "Failed to create new test engine.");
+
+    hr = pTestEngine->Initialize(wzBundleFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to initialize engine.");
+
+    hr = pTestEngine->LoadBA(wzBAFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to load BA.");
+
+    hr = pTestEngine->SendStartupEvent();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnStartup.");
+
+    hr = pTestEngine->SimulateQuit(0);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to simulate quit.");
+
+    hr = pTestEngine->RunApplication();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to run engine.");
+
+    hr = pTestEngine->SendShutdownEvent(BOOTSTRAPPER_SHUTDOWN_ACTION_RELOAD_BOOTSTRAPPER);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnShutdown.");
+
+    pTestEngine->UnloadBA();
+
+LExit:
+    return hr;
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.h b/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.h
new file mode 100644
index 00000000..0cfa147a
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/ShutdownEngine.h
@@ -0,0 +1,8 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+HRESULT RunShutdownEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    );
diff --git a/src/ext/Bal/test/examples/TestEngine/TestEngine.cpp b/src/ext/Bal/test/examples/TestEngine/TestEngine.cpp
new file mode 100644
index 00000000..4c7ec1c3
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/TestEngine.cpp
@@ -0,0 +1,256 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+HRESULT TestEngine::Initialize(
+    __in LPCWSTR wzBundleFilePath
+    )
+{
+    HRESULT hr = S_OK;
+    MSG msg = { };
+
+    LogInitialize(::GetModuleHandleW(NULL));
+
+    hr = LogOpen(NULL, PathFile(wzBundleFilePath), NULL, L"txt", FALSE, FALSE, NULL);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to open log.");
+
+    ::PeekMessageW(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
+
+LExit:
+    return hr;
+}
+
+HRESULT TestEngine::LoadBA(
+    __in LPCWSTR wzBAFilePath
+    )
+{
+    HRESULT hr = S_OK;
+    BOOTSTRAPPER_COMMAND command = { };
+    BOOTSTRAPPER_CREATE_ARGS args = { };
+    PFN_BOOTSTRAPPER_APPLICATION_CREATE pfnCreate = NULL;
+
+    if (m_pCreateResults || m_hBAModule)
+    {
+        ExitFunction1(hr = E_INVALIDSTATE);
+    }
+
+    m_pCreateResults = static_cast<BOOTSTRAPPER_CREATE_RESULTS*>(MemAlloc(sizeof(BOOTSTRAPPER_CREATE_RESULTS), TRUE));
+
+    command.cbSize = sizeof(BOOTSTRAPPER_COMMAND);
+
+    hr = PathGetDirectory(wzBAFilePath, &command.wzBootstrapperWorkingFolder);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to allocate wzBootstrapperWorkingFolder");
+
+    hr = PathConcat(command.wzBootstrapperWorkingFolder, L"BootstrapperApplicationData.xml", &command.wzBootstrapperApplicationDataPath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to allocate wzBootstrapperApplicationDataPath");
+
+    args.cbSize = sizeof(BOOTSTRAPPER_CREATE_ARGS);
+    args.pCommand = &command;
+    args.pfnBootstrapperEngineProc = TestEngine::EngineProc;
+    args.pvBootstrapperEngineProcContext = this;
+    args.qwEngineAPIVersion = MAKEQWORDVERSION(0, 0, 0, 1);
+
+    m_pCreateResults->cbSize = sizeof(BOOTSTRAPPER_CREATE_RESULTS);
+
+    m_hBAModule = ::LoadLibraryExW(wzBAFilePath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+    ConsoleExitOnNullWithLastError(m_hBAModule, hr, CONSOLE_COLOR_RED, "Failed to load BA dll.");
+
+    pfnCreate = (PFN_BOOTSTRAPPER_APPLICATION_CREATE)::GetProcAddress(m_hBAModule, "BootstrapperApplicationCreate");
+    ConsoleExitOnNull(pfnCreate, hr, E_OUTOFMEMORY, CONSOLE_COLOR_RED, "Failed to get address for BootstrapperApplicationCreate.");
+
+    hr = pfnCreate(&args, m_pCreateResults);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure on BootstrapperApplicationCreate.");
+
+LExit:
+    ReleaseStr(command.wzBootstrapperApplicationDataPath);
+    ReleaseStr(command.wzBootstrapperWorkingFolder);
+
+    return hr;
+}
+
+HRESULT TestEngine::Log(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in LPCWSTR wzMessage
+    )
+{
+    switch (level)
+    {
+    case BOOTSTRAPPER_LOG_LEVEL_NONE:
+    case BOOTSTRAPPER_LOG_LEVEL_DEBUG:
+        return S_OK;
+    default:
+        LogStringLine(REPORT_STANDARD, "%ls", wzMessage);
+        return ConsoleWriteLine(CONSOLE_COLOR_NORMAL, "%ls", wzMessage);
+    }
+}
+
+HRESULT TestEngine::RunApplication()
+{
+    HRESULT hr = S_OK;
+    MSG msg = { };
+    BOOL fRet = FALSE;
+
+    // Enter the message pump.
+    while (0 != (fRet = ::GetMessageW(&msg, NULL, 0, 0)))
+    {
+        if (-1 == fRet)
+        {
+            ConsoleExitOnFailure(hr = E_UNEXPECTED, CONSOLE_COLOR_RED, "Unexpected return value from message pump.");
+        }
+        else
+        {
+            ProcessBAMessage(&msg);
+        }
+    }
+
+LExit:
+    return hr;
+}
+
+HRESULT TestEngine::SendShutdownEvent(
+    __in BOOTSTRAPPER_SHUTDOWN_ACTION defaultAction
+    )
+{
+    HRESULT hr = S_OK;
+    BA_ONSHUTDOWN_ARGS shutdownArgs = { };
+    BA_ONSHUTDOWN_RESULTS shutdownResults = { };
+    shutdownArgs.cbSize = sizeof(BA_ONSHUTDOWN_ARGS);
+    shutdownResults.action = defaultAction;
+    shutdownResults.cbSize = sizeof(BA_ONSHUTDOWN_RESULTS);
+    hr = m_pCreateResults->pfnBootstrapperApplicationProc(BOOTSTRAPPER_APPLICATION_MESSAGE_ONSHUTDOWN, &shutdownArgs, &shutdownResults, m_pCreateResults->pvBootstrapperApplicationProcContext);
+    return hr;
+}
+
+HRESULT TestEngine::SendStartupEvent()
+{
+    HRESULT hr = S_OK;
+    BA_ONSTARTUP_ARGS startupArgs = { };
+    BA_ONSTARTUP_RESULTS startupResults = { };
+    startupArgs.cbSize = sizeof(BA_ONSTARTUP_ARGS);
+    startupResults.cbSize = sizeof(BA_ONSTARTUP_RESULTS);
+    hr = m_pCreateResults->pfnBootstrapperApplicationProc(BOOTSTRAPPER_APPLICATION_MESSAGE_ONSTARTUP, &startupArgs, &startupResults, m_pCreateResults->pvBootstrapperApplicationProcContext);
+    return hr;
+}
+
+HRESULT TestEngine::SimulateQuit(
+    __in DWORD dwExitCode
+    )
+{
+    BAENGINE_QUIT_ARGS args = { };
+    BAENGINE_QUIT_RESULTS results = { };
+
+    args.cbSize = sizeof(BAENGINE_QUIT_ARGS);
+    args.dwExitCode = dwExitCode;
+
+    results.cbSize = sizeof(BAENGINE_QUIT_RESULTS);
+
+    return BAEngineQuit(&args, &results);
+}
+
+void TestEngine::UnloadBA()
+{
+    PFN_BOOTSTRAPPER_APPLICATION_DESTROY pfnDestroy = NULL;
+    BOOL fDisableUnloading = m_pCreateResults && m_pCreateResults->fDisableUnloading;
+
+    ReleaseNullMem(m_pCreateResults);
+
+    pfnDestroy = (PFN_BOOTSTRAPPER_APPLICATION_DESTROY)::GetProcAddress(m_hBAModule, "BootstrapperApplicationDestroy");
+
+    if (pfnDestroy)
+    {
+        pfnDestroy();
+    }
+
+    if (m_hBAModule)
+    {
+        if (!fDisableUnloading)
+        {
+            ::FreeLibrary(m_hBAModule);
+        }
+
+        m_hBAModule = NULL;
+    }
+}
+
+HRESULT TestEngine::BAEngineLog(
+    __in BAENGINE_LOG_ARGS* pArgs,
+    __in BAENGINE_LOG_RESULTS* /*pResults*/
+    )
+{
+    return Log(pArgs->level, pArgs->wzMessage);
+}
+
+HRESULT TestEngine::BAEngineQuit(
+    __in BAENGINE_QUIT_ARGS* pArgs,
+    __in BAENGINE_QUIT_RESULTS* /*pResults*/
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!::PostThreadMessageW(m_dwThreadId, WM_TESTENG_QUIT, static_cast<WPARAM>(pArgs->dwExitCode), 0))
+    {
+        ConsoleExitWithLastError(hr, CONSOLE_COLOR_RED, "Failed to post shutdown message.");
+    }
+
+LExit:
+    return hr;
+}
+
+HRESULT WINAPI TestEngine::EngineProc(
+    __in BOOTSTRAPPER_ENGINE_MESSAGE message,
+    __in const LPVOID pvArgs,
+    __inout LPVOID pvResults,
+    __in_opt LPVOID pvContext
+    )
+{
+    HRESULT hr = S_OK;
+    TestEngine* pContext = (TestEngine*)pvContext;
+
+    if (!pContext || !pvArgs || !pvResults)
+    {
+        ExitFunction1(hr = E_INVALIDARG);
+    }
+
+    switch (message)
+    {
+    case BOOTSTRAPPER_ENGINE_MESSAGE_LOG:
+        hr = pContext->BAEngineLog(reinterpret_cast<BAENGINE_LOG_ARGS*>(pvArgs), reinterpret_cast<BAENGINE_LOG_RESULTS*>(pvResults));
+        break;
+    case BOOTSTRAPPER_ENGINE_MESSAGE_QUIT:
+        hr = pContext->BAEngineQuit(reinterpret_cast<BAENGINE_QUIT_ARGS*>(pvArgs), reinterpret_cast<BAENGINE_QUIT_RESULTS*>(pvResults));
+    default:
+        hr = E_NOTIMPL;
+        break;
+    }
+
+LExit:
+    return hr;
+}
+
+HRESULT TestEngine::ProcessBAMessage(
+    __in const MSG* pmsg
+    )
+{
+    HRESULT hr = S_OK;
+
+    switch (pmsg->message)
+    {
+    case WM_TESTENG_QUIT:
+        ::PostQuitMessage(static_cast<int>(pmsg->wParam)); // go bye-bye.
+        break;
+    }
+
+    return hr;
+}
+
+TestEngine::TestEngine()
+{
+    m_hBAModule = NULL;
+    m_pCreateResults = NULL;
+    m_dwThreadId = ::GetCurrentThreadId();
+}
+
+TestEngine::~TestEngine()
+{
+    ReleaseMem(m_pCreateResults);
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/TestEngine.h b/src/ext/Bal/test/examples/TestEngine/TestEngine.h
new file mode 100644
index 00000000..44e813bd
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/TestEngine.h
@@ -0,0 +1,80 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+enum WM_TESTENG
+{
+    WM_TESTENG_FIRST = WM_APP + 0xFFF, // this enum value must always be first.
+
+    WM_TESTENG_DETECT,
+    WM_TESTENG_PLAN,
+    WM_TESTENG_ELEVATE,
+    WM_TESTENG_APPLY,
+    WM_TESTENG_LAUNCH_APPROVED_EXE,
+    WM_TESTENG_QUIT,
+
+    WM_TESTENG_LAST, // this enum value must always be last.
+};
+
+class TestEngine
+{
+public:
+    HRESULT Initialize(
+        __in LPCWSTR wzBundleFilePath
+        );
+
+    HRESULT LoadBA(
+        __in LPCWSTR wzBAFilePath
+        );
+
+    HRESULT Log(
+        __in BOOTSTRAPPER_LOG_LEVEL level,
+        __in LPCWSTR wzMessage
+        );
+
+    HRESULT RunApplication();
+
+    HRESULT SendShutdownEvent(
+        __in BOOTSTRAPPER_SHUTDOWN_ACTION defaultAction
+        );
+
+    HRESULT SendStartupEvent();
+
+    HRESULT SimulateQuit(
+        __in DWORD dwExitCode
+        );
+
+    void UnloadBA();
+
+private:
+    HRESULT BAEngineLog(
+        __in BAENGINE_LOG_ARGS* pArgs,
+        __in BAENGINE_LOG_RESULTS* pResults
+        );
+
+    HRESULT BAEngineQuit(
+        __in BAENGINE_QUIT_ARGS* pArgs,
+        __in BAENGINE_QUIT_RESULTS* pResults
+        );
+
+    static HRESULT WINAPI EngineProc(
+        __in BOOTSTRAPPER_ENGINE_MESSAGE message,
+        __in const LPVOID pvArgs,
+        __inout LPVOID pvResults,
+        __in_opt LPVOID pvContext
+        );
+
+    HRESULT ProcessBAMessage(
+        __in const MSG* pmsg
+        );
+
+public:
+    TestEngine();
+
+    ~TestEngine();
+
+private:
+    HMODULE m_hBAModule;
+    BOOTSTRAPPER_CREATE_RESULTS* m_pCreateResults;
+    DWORD m_dwThreadId;
+};
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.cpp b/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.cpp
new file mode 100644
index 00000000..2f80ba75
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.cpp
@@ -0,0 +1,35 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+HRESULT RunWaitForQuitEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    )
+{
+    HRESULT hr = S_OK;
+    TestEngine* pTestEngine = NULL;
+
+    pTestEngine = new TestEngine();
+    ConsoleExitOnNull(pTestEngine, hr, E_OUTOFMEMORY, CONSOLE_COLOR_RED, "Failed to create new test engine.");
+
+    hr = pTestEngine->Initialize(wzBundleFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to initialize engine.");
+
+    hr = pTestEngine->LoadBA(wzBAFilePath);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to load BA.");
+
+    hr = pTestEngine->SendStartupEvent();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnStartup.");
+
+    hr = pTestEngine->RunApplication();
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "Failed to run engine.");
+
+    hr = pTestEngine->SendShutdownEvent(BOOTSTRAPPER_SHUTDOWN_ACTION_RELOAD_BOOTSTRAPPER);
+    ConsoleExitOnFailure(hr, CONSOLE_COLOR_RED, "BA returned failure for OnShutdown.");
+
+    pTestEngine->UnloadBA();
+
+LExit:
+    return hr;
+}
diff --git a/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.h b/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.h
new file mode 100644
index 00000000..99e3f63c
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/WaitForQuitEngine.h
@@ -0,0 +1,8 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+HRESULT RunWaitForQuitEngine(
+    __in LPCWSTR wzBundleFilePath,
+    __in LPCWSTR wzBAFilePath
+    );
diff --git a/src/ext/Bal/test/examples/TestEngine/packages.config b/src/ext/Bal/test/examples/TestEngine/packages.config
new file mode 100644
index 00000000..548ddb48
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/packages.config
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Nerdbank.GitVersioning" version="3.3.37" targetFramework="native" developmentDependency="true" />
+  <package id="WixToolset.BootstrapperCore.Native" version="4.0.141" targetFramework="native" />
+  <package id="WixToolset.BalUtil" version="4.0.58" targetFramework="native" />
+  <package id="WixToolset.DUtil" version="4.0.72" targetFramework="native" />
+</packages>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/TestEngine/precomp.cpp b/src/ext/Bal/test/examples/TestEngine/precomp.cpp
new file mode 100644
index 00000000..37664a1c
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/precomp.cpp
@@ -0,0 +1,3 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
diff --git a/src/ext/Bal/test/examples/TestEngine/precomp.h b/src/ext/Bal/test/examples/TestEngine/precomp.h
new file mode 100644
index 00000000..f943f420
--- /dev/null
+++ b/src/ext/Bal/test/examples/TestEngine/precomp.h
@@ -0,0 +1,20 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include <windows.h>
+#include <MsiQuery.h>
+
+#include "dutil.h"
+#include "conutil.h"
+#include "logutil.h"
+#include "memutil.h"
+#include "pathutil.h"
+#include "strutil.h"
+
+#include "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+
+#include "TestEngine.h"
+#include "ReloadEngine.h"
+#include "ShutdownEngine.h"
+#include "WaitForQuitEngine.h"
diff --git a/src/ext/Bal/test/examples/WPFCoreBundleFDD/FrameworkDependentBundle.wxs b/src/ext/Bal/test/examples/WPFCoreBundleFDD/FrameworkDependentBundle.wxs
new file mode 100644
index 00000000..68d742b0
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreBundleFDD/FrameworkDependentBundle.wxs
@@ -0,0 +1,16 @@
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:bal="http://wixtoolset.org/schemas/v4/wxs/bal">
+    <Bundle Name="FDDWPFCoreMBA" Version="1.0.0.0" Manufacturer="Example Corporation" UpgradeCode="5CE5B5C7-4B6B-4B95-B297-731F1F956533">
+        <BootstrapperApplication>
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\Example.WPFCoreMBA.deps.json" Name="Example.WPFCoreMBA.deps.json" />
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\Example.WPFCoreMBA.dll" Name="Example.WPFCoreMBA.dll" bal:BAFactoryAssembly="yes" />
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\Example.WPFCoreMBA.pdb" Name="Example.WPFCoreMBA.pdb" />
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\Example.WPFCoreMBA.runtimeconfig.json" Name="Example.WPFCoreMBA.runtimeconfig.json" />
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\mbanative.dll" Name="mbanative.dll" />
+            <Payload SourceFile="publish\Example.WPFCoreMBA\fdd\WixToolset.Mba.Core.dll" Name="WixToolset.Mba.Core.dll" />
+            <bal:WixDotNetCoreBootstrapperApplicationHost />
+        </BootstrapperApplication>
+        <Chain>
+            <ExePackage DetectCondition="none" SourceFile="c:\windows\system32\kernel32.dll" bal:PrereqPackage="yes" />
+        </Chain>
+    </Bundle>
+</Wix>
diff --git a/src/ext/Bal/test/examples/WPFCoreBundleFDD/WPFCoreBundleFDD.wixproj b/src/ext/Bal/test/examples/WPFCoreBundleFDD/WPFCoreBundleFDD.wixproj
new file mode 100644
index 00000000..ba75a9ff
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreBundleFDD/WPFCoreBundleFDD.wixproj
@@ -0,0 +1,2 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" />
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/AssemblyInfo.cs b/src/ext/Bal/test/examples/WPFCoreMBA/AssemblyInfo.cs
new file mode 100644
index 00000000..03a5c7fa
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/AssemblyInfo.cs
@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+using System.Windows;
+
+[assembly:ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj b/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj
new file mode 100644
index 00000000..296e5be9
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj
@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0-windows</TargetFramework>
+    <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+    <Description>WPF .NET Core MBA</Description>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Mba.Core" Version="4.0.*" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml b/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml
new file mode 100644
index 00000000..40a27a06
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Window x:Class="Example.WPFCoreMBA.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:Example.WPFCoreMBA"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Grid>
+
+    </Grid>
+</Window>
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml.cs b/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml.cs
new file mode 100644
index 00000000..4f61b807
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/MainWindow.xaml.cs
@@ -0,0 +1,17 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.WPFCoreMBA
+{
+    using System.Windows;
+
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            this.InitializeComponent();
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBA.cs b/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBA.cs
new file mode 100644
index 00000000..d50be813
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBA.cs
@@ -0,0 +1,42 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace Example.WPFCoreMBA
+{
+    using System.Windows.Threading;
+    using WixToolset.Mba.Core;
+
+    public class WPFCoreBA : BootstrapperApplication
+    {
+        public WPFCoreBA(IEngine engine)
+            : base(engine)
+        {
+        }
+        
+        public Dispatcher BADispatcher { get; private set; }
+
+        protected override void Run()
+        {
+            this.BADispatcher = Dispatcher.CurrentDispatcher;
+            var window = new MainWindow();
+            window.Closed += (s, e) => this.BADispatcher.InvokeShutdown();
+            //window.Show();
+            //Dispatcher.Run();
+            //this.engine.Quit(0);
+        }
+
+        protected override void OnStartup(StartupEventArgs args)
+        {
+            base.OnStartup(args);
+
+            this.engine.Log(LogLevel.Standard, nameof(WPFCoreBA));
+        }
+
+        protected override void OnShutdown(ShutdownEventArgs args)
+        {
+            base.OnShutdown(args);
+
+            var message = "Shutdown," + args.Action.ToString() + "," + args.HResult.ToString();
+            this.engine.Log(LogLevel.Standard, message);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBAFactory.cs b/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBAFactory.cs
new file mode 100644
index 00000000..a3ccdf9f
--- /dev/null
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/WPFCoreBAFactory.cs
@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+[assembly: WixToolset.Mba.Core.BootstrapperApplicationFactory(typeof(Example.WPFCoreMBA.WPFCoreBAFactory))]
+namespace Example.WPFCoreMBA
+{
+    using WixToolset.Mba.Core;
+
+    public class WPFCoreBAFactory : BaseBootstrapperApplicationFactory
+    {
+        private static int loadCount = 0;
+
+        protected override IBootstrapperApplication Create(IEngine engine, IBootstrapperCommand bootstrapperCommand)
+        {
+            if (loadCount > 0)
+            {
+                engine.Log(LogLevel.Standard, $"Reloaded {loadCount} time(s)");
+            }
+            ++loadCount;
+            return new WPFCoreBA(engine);
+        }
+    }
+}
diff --git a/src/ext/Bal/test/examples/Wix.Build.props b/src/ext/Bal/test/examples/Wix.Build.props
new file mode 100644
index 00000000..aad94bb6
--- /dev/null
+++ b/src/ext/Bal/test/examples/Wix.Build.props
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project>
+  <PropertyGroup>
+    <OutputType>Bundle</OutputType>
+    <TargetExt>.exe</TargetExt>
+    <HarvestDirectoryAdditionalOptions>-generate payloadgroup</HarvestDirectoryAdditionalOptions>
+    <OutputPath>$(OutputPath)examples\</OutputPath>
+  </PropertyGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/Wix.Build.targets b/src/ext/Bal/test/examples/Wix.Build.targets
new file mode 100644
index 00000000..7e6fe9f2
--- /dev/null
+++ b/src/ext/Bal/test/examples/Wix.Build.targets
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project>
+  <ItemGroup>
+    <BindInputPaths Include="$(OutputPath)" />
+    <WixExtension Include="$(OutputPath)..\netstandard2.0\WixToolset.Bal.wixext.dll" />
+  </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/test/examples/examples.proj b/src/ext/Bal/test/examples/examples.proj
new file mode 100644
index 00000000..08cb7511
--- /dev/null
+++ b/src/ext/Bal/test/examples/examples.proj
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">  
+  <Import Project="..\..\Directory.Build.props" />
+
+  <PropertyGroup>
+    <EarliestCoreMBAProjectPath>EarliestCoreMBA\Example.EarliestCoreMBA.csproj</EarliestCoreMBAProjectPath>
+    <FullFramework2MBAProjectPath>FullFramework2MBA\Example.FullFramework2MBA.csproj</FullFramework2MBAProjectPath>
+    <FullFramework4MBAProjectPath>FullFramework4MBA\Example.FullFramework4MBA.csproj</FullFramework4MBAProjectPath>
+    <LatestCoreMBAProjectPath>LatestCoreMBA\Example.LatestCoreMBA.csproj</LatestCoreMBAProjectPath>
+    <WPFCoreMBAProjectPath>WPFCoreMBA\Example.WPFCoreMBA.csproj</WPFCoreMBAProjectPath>
+    <MBAPublishPath>$(OutputPath)examples\publish\</MBAPublishPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <CoreMBAProject Include="$(EarliestCoreMBAProjectPath)">
+      <PublishPath>$(MBAPublishPath)Example.EarliestCoreMBA</PublishPath>
+    </CoreMBAProject>
+    <CoreMBAProject Include="$(LatestCoreMBAProjectPath)">
+      <PublishPath>$(MBAPublishPath)Example.LatestCoreMBA</PublishPath>
+    </CoreMBAProject>
+    <CoreMBAProject Include="$(WPFCoreMBAProjectPath)">
+      <PublishPath>$(MBAPublishPath)Example.WPFCoreMBA</PublishPath>
+      <SkipSCD>true</SkipSCD>
+      <SkipTrimmedSCD>true</SkipTrimmedSCD>
+    </CoreMBAProject>
+    
+    <FullMBAProject Include="$(FullFramework2MBAProjectPath)" />
+    <FullMBAProject Include="$(FullFramework4MBAProjectPath)" />
+    
+    <ExampleBundleProject Include="**\*.wixproj" />
+  </ItemGroup>
+
+  <Target Name="PublishCoreExamples">
+    <Exec Command='dotnet publish -o "%(CoreMBAProject.PublishPath)\fdd" -r win-x86 -c $(Configuration) --self-contained false "%(CoreMBAProject.Identity)"'
+          Condition="'%(CoreMBAProject.SkipFDD)'==''" />
+    <Exec Command='dotnet publish -o "%(CoreMBAProject.PublishPath)\scd" -r win-x86 -c $(Configuration) --self-contained true "%(CoreMBAProject.Identity)"'
+          Condition="'%(CoreMBAProject.SkipSCD)'==''" />
+    <Exec Command='dotnet publish -o "%(CoreMBAProject.PublishPath)\trimmedscd" -r win-x86 -c $(Configuration) --self-contained true -p:PublishTrimmed=true "%(CoreMBAProject.Identity)"'
+          Condition="'%(CoreMBAProject.SkipTrimmedSCD)'==''" />
+  </Target>
+
+  <Target Name="Build" DependsOnTargets="PublishCoreExamples">
+    <MSBuild Projects="%(ExampleBundleProject.Identity)" />
+  </Target>
+  
+  <Import Project="..\..\Directory.Build.targets" />
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/wix.snk b/src/ext/Bal/wix.snk
new file mode 100644
index 00000000..3908a66a
--- /dev/null
+++ b/src/ext/Bal/wix.snk
diff --git a/src/ext/Bal/wixext/BalBurnBackendExtension.cs b/src/ext/Bal/wixext/BalBurnBackendExtension.cs
new file mode 100644
index 00000000..e8dc7a3e
--- /dev/null
+++ b/src/ext/Bal/wixext/BalBurnBackendExtension.cs
@@ -0,0 +1,171 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using WixToolset.Bal.Symbols;
+    using WixToolset.Data;
+    using WixToolset.Data.Burn;
+    using WixToolset.Data.Symbols;
+    using WixToolset.Extensibility;
+
+    public class BalBurnBackendExtension : BaseBurnBackendBinderExtension
+    {
+        private static readonly IntermediateSymbolDefinition[] BurnSymbolDefinitions =
+        {
+            BalSymbolDefinitions.WixBalBAFactoryAssembly,
+            BalSymbolDefinitions.WixBalBAFunctions,
+            BalSymbolDefinitions.WixBalCondition,
+            BalSymbolDefinitions.WixBalPackageInfo,
+            BalSymbolDefinitions.WixDncOptions,
+            BalSymbolDefinitions.WixMbaPrereqInformation,
+            BalSymbolDefinitions.WixStdbaOptions,
+            BalSymbolDefinitions.WixStdbaOverridableVariable,
+        };
+
+        protected override IReadOnlyCollection<IntermediateSymbolDefinition> SymbolDefinitions => BurnSymbolDefinitions;
+
+        public override void SymbolsFinalized(IntermediateSection section)
+        {
+            base.SymbolsFinalized(section);
+
+            var baSymbol = section.Symbols.OfType<WixBootstrapperApplicationDllSymbol>().SingleOrDefault();
+            var baId = baSymbol?.Id?.Id;
+            if (null == baId)
+            {
+                return;
+            }
+
+            var isStdBA = baId.StartsWith("WixStandardBootstrapperApplication");
+            var isMBA = baId.StartsWith("WixManagedBootstrapperApplicationHost");
+            var isDNC = baId.StartsWith("WixDotNetCoreBootstrapperApplicationHost");
+            var isSCD = isDNC && this.VerifySCD(section);
+
+            if (isDNC)
+            {
+                this.FinalizeBAFactorySymbol(section);
+            }
+
+            if (isStdBA || isMBA || isDNC)
+            {
+                this.VerifyBAFunctions(section);
+            }
+
+            if (isMBA || (isDNC && !isSCD))
+            {
+                this.VerifyPrereqPackages(section, isDNC);
+            }
+        }
+
+        private void FinalizeBAFactorySymbol(IntermediateSection section)
+        {
+            var factorySymbol = section.Symbols.OfType<WixBalBAFactoryAssemblySymbol>().SingleOrDefault();
+            if (null == factorySymbol)
+            {
+                return;
+            }
+
+            var factoryPayloadSymbol = section.Symbols.OfType<WixBundlePayloadSymbol>()
+                                                      .Where(p => p.Id.Id == factorySymbol.PayloadId)
+                                                      .SingleOrDefault();
+            if (null == factoryPayloadSymbol)
+            {
+                return;
+            }
+
+            factorySymbol.FilePath = factoryPayloadSymbol.Name;
+        }
+
+        private void VerifyBAFunctions(IntermediateSection section)
+        {
+            WixBalBAFunctionsSymbol baFunctionsSymbol = null;
+            foreach (var symbol in section.Symbols.OfType<WixBalBAFunctionsSymbol>())
+            {
+                if (null == baFunctionsSymbol)
+                {
+                    baFunctionsSymbol = symbol;
+                }
+                else
+                {
+                    this.Messaging.Write(BalErrors.MultipleBAFunctions(symbol.SourceLineNumbers));
+                }
+            }
+
+            var payloadPropertiesSymbols = section.Symbols.OfType<WixBundlePayloadSymbol>().ToList();
+            if (null == baFunctionsSymbol)
+            {
+                foreach (var payloadPropertiesSymbol in payloadPropertiesSymbols)
+                {
+                    if (string.Equals(payloadPropertiesSymbol.Name, "bafunctions.dll", StringComparison.OrdinalIgnoreCase) &&
+                        BurnConstants.BurnUXContainerName == payloadPropertiesSymbol.ContainerRef)
+                    {
+                        this.Messaging.Write(BalWarnings.UnmarkedBAFunctionsDLL(payloadPropertiesSymbol.SourceLineNumbers));
+                    }
+                }
+            }
+            else
+            {
+                var payloadId = baFunctionsSymbol.Id;
+                var bundlePayloadSymbol = payloadPropertiesSymbols.Single(x => payloadId == x.Id);
+                if (BurnConstants.BurnUXContainerName != bundlePayloadSymbol.ContainerRef)
+                {
+                    this.Messaging.Write(BalErrors.BAFunctionsPayloadRequiredInUXContainer(baFunctionsSymbol.SourceLineNumbers));
+                }
+            }
+        }
+
+        private void VerifyPrereqPackages(IntermediateSection section, bool isDNC)
+        {
+            var prereqInfoSymbols = section.Symbols.OfType<WixMbaPrereqInformationSymbol>().ToList();
+            if (prereqInfoSymbols.Count == 0)
+            {
+                var message = isDNC ? BalErrors.MissingDNCPrereq() : BalErrors.MissingMBAPrereq();
+                this.Messaging.Write(message);
+                return;
+            }
+
+            var foundLicenseFile = false;
+            var foundLicenseUrl = false;
+
+            foreach (var prereqInfoSymbol in prereqInfoSymbols)
+            {
+                if (null != prereqInfoSymbol.LicenseFile)
+                {
+                    if (foundLicenseFile || foundLicenseUrl)
+                    {
+                        this.Messaging.Write(BalErrors.MultiplePrereqLicenses(prereqInfoSymbol.SourceLineNumbers));
+                        return;
+                    }
+
+                    foundLicenseFile = true;
+                }
+
+                if (null != prereqInfoSymbol.LicenseUrl)
+                {
+                    if (foundLicenseFile || foundLicenseUrl)
+                    {
+                        this.Messaging.Write(BalErrors.MultiplePrereqLicenses(prereqInfoSymbol.SourceLineNumbers));
+                        return;
+                    }
+
+                    foundLicenseUrl = true;
+                }
+            }
+        }
+
+        private bool VerifySCD(IntermediateSection section)
+        {
+            var isSCD = false;
+
+            var dncOptions = section.Symbols.OfType<WixDncOptionsSymbol>().SingleOrDefault();
+            if (dncOptions != null)
+            {
+                isSCD = dncOptions.SelfContainedDeployment != 0;
+            }
+
+            return isSCD;
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/BalCompiler.cs b/src/ext/Bal/wixext/BalCompiler.cs
new file mode 100644
index 00000000..267345e7
--- /dev/null
+++ b/src/ext/Bal/wixext/BalCompiler.cs
@@ -0,0 +1,923 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Xml.Linq;
+    using WixToolset.Bal.Symbols;
+    using WixToolset.Data;
+    using WixToolset.Data.Symbols;
+    using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Data;
+
+    /// <summary>
+    /// The compiler for the WiX Toolset Bal Extension.
+    /// </summary>
+    public sealed class BalCompiler : BaseCompilerExtension
+    {
+        private readonly Dictionary<string, WixMbaPrereqInformationSymbol> prereqInfoSymbolsByPackageId;
+
+        private enum WixDotNetCoreBootstrapperApplicationHostTheme
+        {
+            Unknown,
+            None,
+            Standard,
+        }
+
+        private enum WixManagedBootstrapperApplicationHostTheme
+        {
+            Unknown,
+            None,
+            Standard,
+        }
+
+        private enum WixStandardBootstrapperApplicationTheme
+        {
+            Unknown,
+            HyperlinkLargeLicense,
+            HyperlinkLicense,
+            HyperlinkSidebarLicense,
+            None,
+            RtfLargeLicense,
+            RtfLicense,
+        }
+
+        /// <summary>
+        /// Instantiate a new BalCompiler.
+        /// </summary>
+        public BalCompiler()
+        {
+            this.prereqInfoSymbolsByPackageId = new Dictionary<string, WixMbaPrereqInformationSymbol>();
+        }
+
+        public override XNamespace Namespace => "http://wixtoolset.org/schemas/v4/wxs/bal";
+
+        /// <summary>
+        /// Processes an element for the Compiler.
+        /// </summary>
+        /// <param name="intermediate"></param>
+        /// <param name="section"></param>
+        /// <param name="parentElement">Parent element of element to process.</param>
+        /// <param name="element">Element to process.</param>
+        /// <param name="context">Extra information about the context in which this element is being parsed.</param>
+        public override void ParseElement(Intermediate intermediate, IntermediateSection section, XElement parentElement, XElement element, IDictionary<string, string> context)
+        {
+            switch (parentElement.Name.LocalName)
+            {
+                case "Bundle":
+                case "Fragment":
+                    switch (element.Name.LocalName)
+                    {
+                        case "Condition":
+                            this.ParseConditionElement(intermediate, section, element);
+                            break;
+                        case "ManagedBootstrapperApplicationPrereqInformation":
+                            this.ParseMbaPrereqInfoElement(intermediate, section, element);
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedElement(parentElement, element);
+                            break;
+                    }
+                    break;
+                case "BootstrapperApplication":
+                    switch (element.Name.LocalName)
+                    {
+                        case "WixStandardBootstrapperApplication":
+                            this.ParseWixStandardBootstrapperApplicationElement(intermediate, section, element);
+                            break;
+                        case "WixManagedBootstrapperApplicationHost":
+                            this.ParseWixManagedBootstrapperApplicationHostElement(intermediate, section, element);
+                            break;
+                        case "WixDotNetCoreBootstrapperApplicationHost":
+                            this.ParseWixDotNetCoreBootstrapperApplicationHostElement(intermediate, section, element);
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedElement(parentElement, element);
+                            break;
+                    }
+                    break;
+                default:
+                    this.ParseHelper.UnexpectedElement(parentElement, element);
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Processes an attribute for the Compiler.
+        /// </summary>
+        /// <param name="sourceLineNumbers">Source line number for the parent element.</param>
+        /// <param name="parentElement">Parent element of element to process.</param>
+        /// <param name="attribute">Attribute to process.</param>
+        /// <param name="context">Extra information about the context in which this element is being parsed.</param>
+        public override void ParseAttribute(Intermediate intermediate, IntermediateSection section, XElement parentElement, XAttribute attribute, IDictionary<string, string> context)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(parentElement);
+            WixMbaPrereqInformationSymbol prereqInfo;
+
+            switch (parentElement.Name.LocalName)
+            {
+                case "ExePackage":
+                case "MsiPackage":
+                case "MspPackage":
+                case "MsuPackage":
+                    string packageId;
+                    if (!context.TryGetValue("PackageId", out packageId) || String.IsNullOrEmpty(packageId))
+                    {
+                        this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, parentElement.Name.LocalName, "Id", attribute.Name.LocalName));
+                    }
+                    else
+                    {
+                        switch (attribute.Name.LocalName)
+                        {
+                            case "DisplayInternalUICondition":
+                                switch (parentElement.Name.LocalName)
+                                {
+                                    case "MsiPackage":
+                                    case "MspPackage":
+                                        var displayInternalUICondition = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attribute);
+                                        section.AddSymbol(new WixBalPackageInfoSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, packageId))
+                                        {
+                                            PackageId = packageId,
+                                            DisplayInternalUICondition = displayInternalUICondition,
+                                        });
+                                        break;
+                                    default:
+                                        this.ParseHelper.UnexpectedAttribute(parentElement, attribute);
+                                        break;
+                                }
+                                break;
+                            case "PrereqLicenseFile":
+
+                                if (!this.prereqInfoSymbolsByPackageId.TryGetValue(packageId, out prereqInfo))
+                                {
+                                    // at the time the extension attribute is parsed, the compiler might not yet have
+                                    // parsed the PrereqPackage attribute, so we need to get it directly from the parent element.
+                                    var prereqPackage = parentElement.Attribute(this.Namespace + "PrereqPackage");
+
+                                    if (null != prereqPackage && YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, prereqPackage))
+                                    {
+                                        prereqInfo = section.AddSymbol(new WixMbaPrereqInformationSymbol(sourceLineNumbers)
+                                        {
+                                            PackageId = packageId,
+                                        });
+
+                                        this.prereqInfoSymbolsByPackageId.Add(packageId, prereqInfo);
+                                    }
+                                    else
+                                    {
+                                        this.Messaging.Write(BalErrors.AttributeRequiresPrereqPackage(sourceLineNumbers, parentElement.Name.LocalName, "PrereqLicenseFile"));
+                                        break;
+                                    }
+                                }
+
+                                if (null != prereqInfo.LicenseUrl)
+                                {
+                                    this.Messaging.Write(ErrorMessages.IllegalAttributeWithOtherAttribute(sourceLineNumbers, parentElement.Name.LocalName, "PrereqLicenseFile", "PrereqLicenseUrl"));
+                                }
+                                else
+                                {
+                                    prereqInfo.LicenseFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attribute);
+                                }
+                                break;
+                            case "PrereqLicenseUrl":
+
+                                if (!this.prereqInfoSymbolsByPackageId.TryGetValue(packageId, out prereqInfo))
+                                {
+                                    // at the time the extension attribute is parsed, the compiler might not yet have
+                                    // parsed the PrereqPackage attribute, so we need to get it directly from the parent element.
+                                    var prereqPackage = parentElement.Attribute(this.Namespace + "PrereqPackage");
+
+                                    if (null != prereqPackage && YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, prereqPackage))
+                                    {
+                                        prereqInfo = section.AddSymbol(new WixMbaPrereqInformationSymbol(sourceLineNumbers)
+                                        {
+                                            PackageId = packageId,
+                                        });
+
+                                        this.prereqInfoSymbolsByPackageId.Add(packageId, prereqInfo);
+                                    }
+                                    else
+                                    {
+                                        this.Messaging.Write(BalErrors.AttributeRequiresPrereqPackage(sourceLineNumbers, parentElement.Name.LocalName, "PrereqLicenseUrl"));
+                                        break;
+                                    }
+                                }
+
+                                if (null != prereqInfo.LicenseFile)
+                                {
+                                    this.Messaging.Write(ErrorMessages.IllegalAttributeWithOtherAttribute(sourceLineNumbers, parentElement.Name.LocalName, "PrereqLicenseUrl", "PrereqLicenseFile"));
+                                }
+                                else
+                                {
+                                    prereqInfo.LicenseUrl = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attribute);
+                                }
+                                break;
+                            case "PrereqPackage":
+                                if (YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attribute))
+                                {
+                                    if (!this.prereqInfoSymbolsByPackageId.TryGetValue(packageId, out prereqInfo))
+                                    {
+                                        prereqInfo = section.AddSymbol(new WixMbaPrereqInformationSymbol(sourceLineNumbers)
+                                        {
+                                            PackageId = packageId,
+                                        });
+
+                                        this.prereqInfoSymbolsByPackageId.Add(packageId, prereqInfo);
+                                    }
+                                }
+                                break;
+                            default:
+                                this.ParseHelper.UnexpectedAttribute(parentElement, attribute);
+                                break;
+                        }
+                    }
+                    break;
+                case "Payload":
+                    string payloadId;
+                    if (!context.TryGetValue("Id", out payloadId) || String.IsNullOrEmpty(payloadId))
+                    {
+                        this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, parentElement.Name.LocalName, "Id", attribute.Name.LocalName));
+                    }
+                    else
+                    {
+                        switch (attribute.Name.LocalName)
+                        {
+                            case "BAFactoryAssembly":
+                                if (YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attribute))
+                                {
+                                    // There can only be one.
+                                    var id = new Identifier(AccessModifier.Global, "TheBAFactoryAssembly");
+                                    section.AddSymbol(new WixBalBAFactoryAssemblySymbol(sourceLineNumbers, id)
+                                    {
+                                        PayloadId = payloadId,
+                                    });
+                                }
+                                break;
+                            case "BAFunctions":
+                                if (YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attribute))
+                                {
+                                    section.AddSymbol(new WixBalBAFunctionsSymbol(sourceLineNumbers)
+                                    {
+                                        PayloadId = payloadId,
+                                    });
+                                }
+                                break;
+                            default:
+                                this.ParseHelper.UnexpectedAttribute(parentElement, attribute);
+                                break;
+                        }
+                    }
+                    break;
+                case "Variable":
+                    // at the time the extension attribute is parsed, the compiler might not yet have
+                    // parsed the Name attribute, so we need to get it directly from the parent element.
+                    var variableName = parentElement.Attribute("Name");
+                    if (null == variableName)
+                    {
+                        this.Messaging.Write(ErrorMessages.ExpectedParentWithAttribute(sourceLineNumbers, "Variable", "Overridable", "Name"));
+                    }
+                    else
+                    {
+                        switch (attribute.Name.LocalName)
+                        {
+                            case "Overridable":
+                                if (YesNoType.Yes == this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attribute))
+                                {
+                                    section.AddSymbol(new WixStdbaOverridableVariableSymbol(sourceLineNumbers)
+                                    {
+                                        Name = variableName.Value,
+                                    });
+                                }
+                                break;
+                            default:
+                                this.ParseHelper.UnexpectedAttribute(parentElement, attribute);
+                                break;
+                        }
+                    }
+                    break;
+            }
+        }
+
+        /// <summary>
+        /// Parses a Condition element for Bundles.
+        /// </summary>
+        /// <param name="node">The element to parse.</param>
+        private void ParseConditionElement(Intermediate intermediate, IntermediateSection section, XElement node)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(node);
+            string condition = null;
+            string message = null;
+
+            foreach (var attrib in node.Attributes())
+            {
+                if (String.IsNullOrEmpty(attrib.Name.NamespaceName) || this.Namespace == attrib.Name.Namespace)
+                {
+                    switch (attrib.Name.LocalName)
+                    {
+                        case "Message":
+                            message = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "Condition":
+                            condition = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedAttribute(node, attrib);
+                            break;
+                    }
+                }
+                else
+                {
+                    this.ParseHelper.ParseExtensionAttribute(this.Context.Extensions, intermediate, section, node, attrib);
+                }
+            }
+
+            this.ParseHelper.ParseForExtensionElements(this.Context.Extensions, intermediate, section, node);
+
+            // Error check the values.
+            if (String.IsNullOrEmpty(condition))
+            {
+                this.Messaging.Write(ErrorMessages.ConditionExpected(sourceLineNumbers, node.Name.LocalName));
+            }
+
+            if (null == message)
+            {
+                this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "Message"));
+            }
+
+            if (!this.Messaging.EncounteredError)
+            {
+                section.AddSymbol(new WixBalConditionSymbol(sourceLineNumbers)
+                {
+                    Condition = condition,
+                    Message = message,
+                });
+            }
+        }
+
+        /// <summary>
+        /// Parses a Condition element for Bundles.
+        /// </summary>
+        /// <param name="node">The element to parse.</param>
+        private void ParseMbaPrereqInfoElement(Intermediate intermediate, IntermediateSection section, XElement node)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(node);
+            string packageId = null;
+            string licenseFile = null;
+            string licenseUrl = null;
+
+            foreach (var attrib in node.Attributes())
+            {
+                if (String.IsNullOrEmpty(attrib.Name.NamespaceName) || this.Namespace == attrib.Name.Namespace)
+                {
+                    switch (attrib.Name.LocalName)
+                    {
+                        case "LicenseFile":
+                            licenseFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LicenseUrl":
+                            licenseUrl = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "PackageId":
+                            packageId = this.ParseHelper.GetAttributeIdentifierValue(sourceLineNumbers, attrib);
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedAttribute(node, attrib);
+                            break;
+                    }
+                }
+                else
+                {
+                    this.ParseHelper.ParseExtensionAttribute(this.Context.Extensions, intermediate, section, node, attrib);
+                }
+            }
+
+            this.ParseHelper.ParseForExtensionElements(this.Context.Extensions, intermediate, section, node);
+
+            if (null == packageId)
+            {
+                this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "PackageId"));
+            }
+
+            if (null == licenseFile && null == licenseUrl ||
+                null != licenseFile && null != licenseUrl)
+            {
+                this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "LicenseFile", "LicenseUrl", true));
+            }
+
+            if (!this.Messaging.EncounteredError)
+            {
+                section.AddSymbol(new WixMbaPrereqInformationSymbol(sourceLineNumbers)
+                {
+                    PackageId = packageId,
+                    LicenseFile = licenseFile,
+                    LicenseUrl = licenseUrl,
+                });
+                this.ParseHelper.CreateSimpleReference(section, sourceLineNumbers, SymbolDefinitions.WixBundlePackage, packageId);
+            }
+        }
+
+        /// <summary>
+        /// Parses a WixStandardBootstrapperApplication element for Bundles.
+        /// </summary>
+        /// <param name="node">The element to parse.</param>
+        private void ParseWixStandardBootstrapperApplicationElement(Intermediate intermediate, IntermediateSection section, XElement node)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(node);
+            string launchTarget = null;
+            string launchTargetElevatedId = null;
+            string launchArguments = null;
+            var launchHidden = YesNoType.NotSet;
+            string launchWorkingDir = null;
+            string licenseFile = null;
+            string licenseUrl = null;
+            string logoFile = null;
+            string logoSideFile = null;
+            WixStandardBootstrapperApplicationTheme? theme = null;
+            string themeFile = null;
+            string localizationFile = null;
+            var suppressOptionsUI = YesNoType.NotSet;
+            var suppressDowngradeFailure = YesNoType.NotSet;
+            var suppressRepair = YesNoType.NotSet;
+            var showVersion = YesNoType.NotSet;
+            var supportCacheOnly = YesNoType.NotSet;
+
+            foreach (var attrib in node.Attributes())
+            {
+                if (String.IsNullOrEmpty(attrib.Name.NamespaceName) || this.Namespace == attrib.Name.Namespace)
+                {
+                    switch (attrib.Name.LocalName)
+                    {
+                        case "LaunchTarget":
+                            launchTarget = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LaunchTargetElevatedId":
+                            launchTargetElevatedId = this.ParseHelper.GetAttributeIdentifierValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LaunchArguments":
+                            launchArguments = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LaunchHidden":
+                            launchHidden = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LaunchWorkingFolder":
+                            launchWorkingDir = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LicenseFile":
+                            licenseFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LicenseUrl":
+                            licenseUrl = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib, EmptyRule.CanBeEmpty);
+                            break;
+                        case "LogoFile":
+                            logoFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LogoSideFile":
+                            logoSideFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "ThemeFile":
+                            themeFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LocalizationFile":
+                            localizationFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "SuppressOptionsUI":
+                            suppressOptionsUI = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "SuppressDowngradeFailure":
+                            suppressDowngradeFailure = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "SuppressRepair":
+                            suppressRepair = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "ShowVersion":
+                            showVersion = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "SupportCacheOnly":
+                            supportCacheOnly = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "Theme":
+                            var themeValue = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            switch (themeValue)
+                            {
+                                case "hyperlinkLargeLicense":
+                                    theme = WixStandardBootstrapperApplicationTheme.HyperlinkLargeLicense;
+                                    break;
+                                case "hyperlinkLicense":
+                                    theme = WixStandardBootstrapperApplicationTheme.HyperlinkLicense;
+                                    break;
+                                case "hyperlinkSidebarLicense":
+                                    theme = WixStandardBootstrapperApplicationTheme.HyperlinkSidebarLicense;
+                                    break;
+                                case "none":
+                                    theme = WixStandardBootstrapperApplicationTheme.None;
+                                    break;
+                                case "rtfLargeLicense":
+                                    theme = WixStandardBootstrapperApplicationTheme.RtfLargeLicense;
+                                    break;
+                                case "rtfLicense":
+                                    theme = WixStandardBootstrapperApplicationTheme.RtfLicense;
+                                    break;
+                                default:
+                                    this.Messaging.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, "Theme", themeValue, "hyperlinkLargeLicense", "hyperlinkLicense", "hyperlinkSidebarLicense", "none", "rtfLargeLicense", "rtfLicense"));
+                                    theme = WixStandardBootstrapperApplicationTheme.Unknown; // set a value to prevent expected attribute error below.
+                                    break;
+                            }
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedAttribute(node, attrib);
+                            break;
+                    }
+                }
+                else
+                {
+                    this.ParseHelper.ParseExtensionAttribute(this.Context.Extensions, intermediate, section, node, attrib);
+                }
+            }
+
+            this.ParseHelper.ParseForExtensionElements(this.Context.Extensions, intermediate, section, node);
+
+            if (!theme.HasValue)
+            {
+                this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "Theme"));
+            }
+
+            if (theme != WixStandardBootstrapperApplicationTheme.None && String.IsNullOrEmpty(licenseFile) && null == licenseUrl)
+            {
+                this.Messaging.Write(ErrorMessages.ExpectedAttribute(sourceLineNumbers, node.Name.LocalName, "LicenseFile", "LicenseUrl", true));
+            }
+
+            if (!this.Messaging.EncounteredError)
+            {
+                if (!String.IsNullOrEmpty(launchTarget))
+                {
+                    section.AddSymbol(new WixBundleVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "LaunchTarget"))
+                    {
+                        Value = launchTarget,
+                        Type = WixBundleVariableType.Formatted,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(launchTargetElevatedId))
+                {
+                    section.AddSymbol(new WixBundleVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "LaunchTargetElevatedId"))
+                    {
+                        Value = launchTargetElevatedId,
+                        Type = WixBundleVariableType.Formatted,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(launchArguments))
+                {
+                    section.AddSymbol(new WixBundleVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "LaunchArguments"))
+                    {
+                        Value = launchArguments,
+                        Type = WixBundleVariableType.Formatted,
+                    });
+                }
+
+                if (YesNoType.Yes == launchHidden)
+                {
+                    section.AddSymbol(new WixBundleVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "LaunchHidden"))
+                    {
+                        Value = "yes",
+                        Type = WixBundleVariableType.Formatted,
+                    });
+                }
+
+
+                if (!String.IsNullOrEmpty(launchWorkingDir))
+                {
+                    section.AddSymbol(new WixBundleVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "LaunchWorkingFolder"))
+                    {
+                        Value = launchWorkingDir,
+                        Type = WixBundleVariableType.Formatted,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(licenseFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaLicenseRtf"))
+                    {
+                        Value = licenseFile,
+                    });
+                }
+
+                if (null != licenseUrl)
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaLicenseUrl"))
+                    {
+                        Value = licenseUrl,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(logoFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaLogo"))
+                    {
+                        Value = logoFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(logoSideFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaLogoSide"))
+                    {
+                        Value = logoSideFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(themeFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaThemeXml"))
+                    {
+                        Value = themeFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(localizationFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "WixStdbaThemeWxl"))
+                    {
+                        Value = localizationFile,
+                    });
+                }
+
+                if (YesNoType.Yes == suppressOptionsUI || YesNoType.Yes == suppressDowngradeFailure || YesNoType.Yes == suppressRepair || YesNoType.Yes == showVersion || YesNoType.Yes == supportCacheOnly)
+                {
+                    var symbol = section.AddSymbol(new WixStdbaOptionsSymbol(sourceLineNumbers));
+                    if (YesNoType.Yes == suppressOptionsUI)
+                    {
+                        symbol.SuppressOptionsUI = 1;
+                    }
+
+                    if (YesNoType.Yes == suppressDowngradeFailure)
+                    {
+                        symbol.SuppressDowngradeFailure = 1;
+                    }
+
+                    if (YesNoType.Yes == suppressRepair)
+                    {
+                        symbol.SuppressRepair = 1;
+                    }
+
+                    if (YesNoType.Yes == showVersion)
+                    {
+                        symbol.ShowVersion = 1;
+                    }
+
+                    if (YesNoType.Yes == supportCacheOnly)
+                    {
+                        symbol.SupportCacheOnly = 1;
+                    }
+                }
+
+                var baId = "WixStandardBootstrapperApplication";
+                switch (theme)
+                {
+                    case WixStandardBootstrapperApplicationTheme.HyperlinkLargeLicense:
+                        baId = "WixStandardBootstrapperApplication.HyperlinkLargeLicense";
+                        break;
+                    case WixStandardBootstrapperApplicationTheme.HyperlinkLicense:
+                        baId = "WixStandardBootstrapperApplication.HyperlinkLicense";
+                        break;
+                    case WixStandardBootstrapperApplicationTheme.HyperlinkSidebarLicense:
+                        baId = "WixStandardBootstrapperApplication.HyperlinkSidebarLicense";
+                        break;
+                    case WixStandardBootstrapperApplicationTheme.RtfLargeLicense:
+                        baId = "WixStandardBootstrapperApplication.RtfLargeLicense";
+                        break;
+                    case WixStandardBootstrapperApplicationTheme.RtfLicense:
+                        baId = "WixStandardBootstrapperApplication.RtfLicense";
+                        break;
+                }
+
+                this.CreateBARef(section, sourceLineNumbers, node, baId);
+            }
+        }
+
+        /// <summary>
+        /// Parses a WixManagedBootstrapperApplicationHost element for Bundles.
+        /// </summary>
+        /// <param name="node">The element to parse.</param>
+        private void ParseWixManagedBootstrapperApplicationHostElement(Intermediate intermediate, IntermediateSection section, XElement node)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(node);
+            string logoFile = null;
+            string themeFile = null;
+            string localizationFile = null;
+            WixManagedBootstrapperApplicationHostTheme? theme = null;
+
+            foreach (var attrib in node.Attributes())
+            {
+                if (String.IsNullOrEmpty(attrib.Name.NamespaceName) || this.Namespace == attrib.Name.Namespace)
+                {
+                    switch (attrib.Name.LocalName)
+                    {
+                        case "LogoFile":
+                            logoFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "ThemeFile":
+                            themeFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LocalizationFile":
+                            localizationFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "Theme":
+                            var themeValue = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            switch (themeValue)
+                            {
+                                case "none":
+                                    theme = WixManagedBootstrapperApplicationHostTheme.None;
+                                    break;
+                                case "standard":
+                                    theme = WixManagedBootstrapperApplicationHostTheme.Standard;
+                                    break;
+                                default:
+                                    this.Messaging.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, "Theme", themeValue, "none", "standard"));
+                                    theme = WixManagedBootstrapperApplicationHostTheme.Unknown;
+                                    break;
+                            }
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedAttribute(node, attrib);
+                            break;
+                    }
+                }
+                else
+                {
+                    this.ParseHelper.ParseExtensionAttribute(this.Context.Extensions, intermediate, section, node, attrib);
+                }
+            }
+
+            if (!theme.HasValue)
+            {
+                theme = WixManagedBootstrapperApplicationHostTheme.Standard;
+            }
+
+            this.ParseHelper.ParseForExtensionElements(this.Context.Extensions, intermediate, section, node);
+
+            if (!this.Messaging.EncounteredError)
+            {
+                if (!String.IsNullOrEmpty(logoFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "PreqbaLogo"))
+                    {
+                        Value = logoFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(themeFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "PreqbaThemeXml"))
+                    {
+                        Value = themeFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(localizationFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "PreqbaThemeWxl"))
+                    {
+                        Value = localizationFile,
+                    });
+                }
+
+                var baId = "WixManagedBootstrapperApplicationHost";
+                switch (theme)
+                {
+                    case WixManagedBootstrapperApplicationHostTheme.Standard:
+                        baId = "WixManagedBootstrapperApplicationHost.Standard";
+                        break;
+                }
+
+                this.CreateBARef(section, sourceLineNumbers, node, baId);
+            }
+        }
+
+        /// <summary>
+        /// Parses a WixDotNetCoreBootstrapperApplication element for Bundles.
+        /// </summary>
+        /// <param name="node">The element to parse.</param>
+        private void ParseWixDotNetCoreBootstrapperApplicationHostElement(Intermediate intermediate, IntermediateSection section, XElement node)
+        {
+            var sourceLineNumbers = this.ParseHelper.GetSourceLineNumbers(node);
+            string logoFile = null;
+            string themeFile = null;
+            string localizationFile = null;
+            var selfContainedDeployment = YesNoType.NotSet;
+            WixDotNetCoreBootstrapperApplicationHostTheme? theme = null;
+
+            foreach (var attrib in node.Attributes())
+            {
+                if (String.IsNullOrEmpty(attrib.Name.NamespaceName) || this.Namespace == attrib.Name.Namespace)
+                {
+                    switch (attrib.Name.LocalName)
+                    {
+                        case "LogoFile":
+                            logoFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "ThemeFile":
+                            themeFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "LocalizationFile":
+                            localizationFile = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            break;
+                        case "SelfContainedDeployment":
+                            selfContainedDeployment = this.ParseHelper.GetAttributeYesNoValue(sourceLineNumbers, attrib);
+                            break;
+                        case "Theme":
+                            var themeValue = this.ParseHelper.GetAttributeValue(sourceLineNumbers, attrib);
+                            switch (themeValue)
+                            {
+                                case "none":
+                                    theme = WixDotNetCoreBootstrapperApplicationHostTheme.None;
+                                    break;
+                                case "standard":
+                                    theme = WixDotNetCoreBootstrapperApplicationHostTheme.Standard;
+                                    break;
+                                default:
+                                    this.Messaging.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, "Theme", themeValue, "none", "standard"));
+                                    theme = WixDotNetCoreBootstrapperApplicationHostTheme.Unknown;
+                                    break;
+                            }
+                            break;
+                        default:
+                            this.ParseHelper.UnexpectedAttribute(node, attrib);
+                            break;
+                    }
+                }
+                else
+                {
+                    this.ParseHelper.ParseExtensionAttribute(this.Context.Extensions, intermediate, section, node, attrib);
+                }
+            }
+
+            if (!theme.HasValue)
+            {
+                theme = WixDotNetCoreBootstrapperApplicationHostTheme.Standard;
+            }
+
+            this.ParseHelper.ParseForExtensionElements(this.Context.Extensions, intermediate, section, node);
+
+            if (!this.Messaging.EncounteredError)
+            {
+                if (!String.IsNullOrEmpty(logoFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "DncPreqbaLogo"))
+                    {
+                        Value = logoFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(themeFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "DncPreqbaThemeXml"))
+                    {
+                        Value = themeFile,
+                    });
+                }
+
+                if (!String.IsNullOrEmpty(localizationFile))
+                {
+                    section.AddSymbol(new WixVariableSymbol(sourceLineNumbers, new Identifier(AccessModifier.Global, "DncPreqbaThemeWxl"))
+                    {
+                        Value = localizationFile,
+                    });
+                }
+
+                if (YesNoType.Yes == selfContainedDeployment)
+                {
+                    section.AddSymbol(new WixDncOptionsSymbol(sourceLineNumbers)
+                    {
+                        SelfContainedDeployment = 1,
+                    });
+                }
+
+                var baId = "WixDotNetCoreBootstrapperApplicationHost";
+                switch (theme)
+                {
+                    case WixDotNetCoreBootstrapperApplicationHostTheme.Standard:
+                        baId = "WixDotNetCoreBootstrapperApplicationHost.Standard";
+                        break;
+                }
+
+                this.CreateBARef(section, sourceLineNumbers, node, baId);
+            }
+        }
+
+        private void CreateBARef(IntermediateSection section, SourceLineNumber sourceLineNumbers, XElement node, string name)
+        {
+            var id = this.ParseHelper.CreateIdentifierValueFromPlatform(name, this.Context.Platform, BurnPlatforms.X86 | BurnPlatforms.X64 | BurnPlatforms.ARM64);
+            if (id == null)
+            {
+                this.Messaging.Write(ErrorMessages.UnsupportedPlatformForElement(sourceLineNumbers, this.Context.Platform.ToString(), node.Name.LocalName));
+            }
+
+            if (!this.Messaging.EncounteredError)
+            {
+                this.ParseHelper.CreateSimpleReference(section, sourceLineNumbers, SymbolDefinitions.WixBootstrapperApplication, id);
+            }
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/BalErrors.cs b/src/ext/Bal/wixext/BalErrors.cs
new file mode 100644
index 00000000..bc0186c1
--- /dev/null
+++ b/src/ext/Bal/wixext/BalErrors.cs
@@ -0,0 +1,61 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using System.Resources;
+    using WixToolset.Data;
+
+    public static class BalErrors
+    {
+        public static Message AttributeRequiresPrereqPackage(SourceLineNumber sourceLineNumbers, string elementName, string attributeName)
+        {
+            return Message(sourceLineNumbers, Ids.AttributeRequiresPrereqPackage, "When the {0}/@{1} attribute is specified, the {0}/@PrereqPackage attribute must be set to \"yes\".", elementName, attributeName);
+        }
+
+        public static Message BAFunctionsPayloadRequiredInUXContainer(SourceLineNumber sourceLineNumbers)
+        {
+            return Message(sourceLineNumbers, Ids.BAFunctionsPayloadRequiredInUXContainer, "The BAFunctions DLL Payload element must be located inside the BootstrapperApplication container.");
+        }
+
+        public static Message MissingDNCPrereq()
+        {
+            return Message(null, Ids.MissingDNCPrereq, "There must be at least one PrereqPackage when using the DotNetCoreBootstrapperApplicationHost with SelfContainedDeployment set to \"no\".");
+        }
+
+        public static Message MissingMBAPrereq()
+        {
+            return Message(null, Ids.MissingMBAPrereq, "There must be at least one PrereqPackage when using the ManagedBootstrapperApplicationHost.\nThis is typically done by using the WixNetFxExtension and referencing one of the NetFxAsPrereq package groups.");
+        }
+
+        public static Message MultipleBAFunctions(SourceLineNumber sourceLineNumbers)
+        {
+            return Message(sourceLineNumbers, Ids.MultipleBAFunctions, "WixStandardBootstrapperApplication doesn't support multiple BAFunctions DLLs.");
+        }
+
+        public static Message MultiplePrereqLicenses(SourceLineNumber sourceLineNumbers)
+        {
+            return Message(sourceLineNumbers, Ids.MultiplePrereqLicenses, "There may only be one package in the bundle that has either the PrereqLicenseFile attribute or the PrereqLicenseUrl attribute.");
+        }
+
+        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, string format, params object[] args)
+        {
+            return new Message(sourceLineNumber, MessageLevel.Error, (int)id, format, args);
+        }
+
+        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, ResourceManager resourceManager, string resourceName, params object[] args)
+        {
+            return new Message(sourceLineNumber, MessageLevel.Error, (int)id, resourceManager, resourceName, args);
+        }
+
+        public enum Ids
+        {
+            AttributeRequiresPrereqPackage = 6801,
+            MissingMBAPrereq = 6802,
+            MultiplePrereqLicenses = 6803,
+            MultipleBAFunctions = 6804,
+            BAFunctionsPayloadRequiredInUXContainer = 6805,
+            MissingDNCPrereq = 6806,
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/BalExtensionData.cs b/src/ext/Bal/wixext/BalExtensionData.cs
new file mode 100644
index 00000000..55daf005
--- /dev/null
+++ b/src/ext/Bal/wixext/BalExtensionData.cs
@@ -0,0 +1,30 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Extensibility;
+
+    /// <summary>
+    /// The WiX Toolset Bal Extension.
+    /// </summary>
+    public sealed class BalExtensionData : BaseExtensionData
+    {
+        /// <summary>
+        /// Gets the default culture.
+        /// </summary>
+        /// <value>The default culture.</value>
+        public override string DefaultCulture => "en-US";
+
+        public override bool TryGetSymbolDefinitionByName(string name, out IntermediateSymbolDefinition symbolDefinition)
+        {
+            symbolDefinition = BalSymbolDefinitions.ByName(name);
+            return symbolDefinition != null;
+        }
+
+        public override Intermediate GetLibrary(ISymbolDefinitionCreator symbolDefinitions)
+        {
+            return Intermediate.Load(typeof(BalExtensionData).Assembly, "WixToolset.Bal.bal.wixlib", symbolDefinitions);
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/BalExtensionFactory.cs b/src/ext/Bal/wixext/BalExtensionFactory.cs
new file mode 100644
index 00000000..0bfb6c5f
--- /dev/null
+++ b/src/ext/Bal/wixext/BalExtensionFactory.cs
@@ -0,0 +1,18 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using System.Collections.Generic;
+    using WixToolset.Extensibility;
+
+    public class BalExtensionFactory : BaseExtensionFactory
+    {
+        protected override IReadOnlyCollection<Type> ExtensionTypes => new[]
+        {
+            typeof(BalCompiler),
+            typeof(BalExtensionData),
+            typeof(BalBurnBackendExtension),
+        };
+    }
+}
diff --git a/src/ext/Bal/wixext/BalWarnings.cs b/src/ext/Bal/wixext/BalWarnings.cs
new file mode 100644
index 00000000..18b25062
--- /dev/null
+++ b/src/ext/Bal/wixext/BalWarnings.cs
@@ -0,0 +1,31 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using System.Resources;
+    using WixToolset.Data;
+
+    public static class BalWarnings
+    {
+        public static Message UnmarkedBAFunctionsDLL(SourceLineNumber sourceLineNumbers)
+        {
+            return Message(sourceLineNumbers, Ids.UnmarkedBAFunctionsDLL, "WixStandardBootstrapperApplication doesn't automatically load BAFunctions.dll. Use the bal:BAFunctions attribute to indicate that it should be loaded.");
+        }
+
+        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, string format, params object[] args)
+        {
+            return new Message(sourceLineNumber, MessageLevel.Warning, (int)id, format, args);
+        }
+
+        private static Message Message(SourceLineNumber sourceLineNumber, Ids id, ResourceManager resourceManager, string resourceName, params object[] args)
+        {
+            return new Message(sourceLineNumber, MessageLevel.Warning, (int)id, resourceManager, resourceName, args);
+        }
+
+        public enum Ids
+        {
+            UnmarkedBAFunctionsDLL = 6501,
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/Symbols/BalSymbolDefinitions.cs b/src/ext/Bal/wixext/Symbols/BalSymbolDefinitions.cs
new file mode 100644
index 00000000..90865621
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/BalSymbolDefinitions.cs
@@ -0,0 +1,80 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using System;
+    using WixToolset.Data;
+    using WixToolset.Data.Burn;
+
+    public enum BalSymbolDefinitionType
+    {
+        WixBalBAFactoryAssembly,
+        WixBalBAFunctions,
+        WixBalCondition,
+        WixBalPackageInfo,
+        WixDncOptions,
+        WixMbaPrereqInformation,
+        WixStdbaOptions,
+        WixStdbaOverridableVariable,
+    }
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly Version Version = new Version("4.0.0");
+
+        public static IntermediateSymbolDefinition ByName(string name)
+        {
+            if (!Enum.TryParse(name, out BalSymbolDefinitionType type))
+            {
+                return null;
+            }
+
+            return ByType(type);
+        }
+
+        public static IntermediateSymbolDefinition ByType(BalSymbolDefinitionType type)
+        {
+            switch (type)
+            {
+                case BalSymbolDefinitionType.WixBalBAFactoryAssembly:
+                    return BalSymbolDefinitions.WixBalBAFactoryAssembly;
+
+                case BalSymbolDefinitionType.WixBalBAFunctions:
+                    return BalSymbolDefinitions.WixBalBAFunctions;
+
+                case BalSymbolDefinitionType.WixBalCondition:
+                    return BalSymbolDefinitions.WixBalCondition;
+
+                case BalSymbolDefinitionType.WixBalPackageInfo:
+                    return BalSymbolDefinitions.WixBalPackageInfo;
+
+                case BalSymbolDefinitionType.WixDncOptions:
+                    return BalSymbolDefinitions.WixDncOptions;
+
+                case BalSymbolDefinitionType.WixMbaPrereqInformation:
+                    return BalSymbolDefinitions.WixMbaPrereqInformation;
+
+                case BalSymbolDefinitionType.WixStdbaOptions:
+                    return BalSymbolDefinitions.WixStdbaOptions;
+
+                case BalSymbolDefinitionType.WixStdbaOverridableVariable:
+                    return BalSymbolDefinitions.WixStdbaOverridableVariable;
+
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(type));
+            }
+        }
+
+        static BalSymbolDefinitions()
+        {
+            WixBalBAFactoryAssembly.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixBalBAFunctions.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixBalCondition.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixBalPackageInfo.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixDncOptions.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixMbaPrereqInformation.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixStdbaOptions.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+            WixStdbaOverridableVariable.AddTag(BurnConstants.BootstrapperApplicationDataSymbolDefinitionTag);
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/Symbols/WixBalBAFactoryAssemblySymbol.cs b/src/ext/Bal/wixext/Symbols/WixBalBAFactoryAssemblySymbol.cs
new file mode 100644
index 00000000..52042e4c
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixBalBAFactoryAssemblySymbol.cs
@@ -0,0 +1,55 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixBalBAFactoryAssembly = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixBalBAFactoryAssembly.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixBalBAFactorySymbolFields.PayloadId), IntermediateFieldType.String),
+                new IntermediateFieldDefinition(nameof(WixBalBAFactorySymbolFields.FilePath), IntermediateFieldType.String),
+            },
+            typeof(WixBalBAFactoryAssemblySymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixBalBAFactorySymbolFields
+    {
+        PayloadId,
+        FilePath,
+    }
+
+    public class WixBalBAFactoryAssemblySymbol : IntermediateSymbol
+    {
+        public WixBalBAFactoryAssemblySymbol() : base(BalSymbolDefinitions.WixBalBAFactoryAssembly, null, null)
+        {
+        }
+
+        public WixBalBAFactoryAssemblySymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixBalBAFactoryAssembly, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixBalBAFactorySymbolFields index] => this.Fields[(int)index];
+
+        public string PayloadId
+        {
+            get => this.Fields[(int)WixBalBAFactorySymbolFields.PayloadId].AsString();
+            set => this.Set((int)WixBalBAFactorySymbolFields.PayloadId, value);
+        }
+
+        public string FilePath
+        {
+            get => this.Fields[(int)WixBalBAFactorySymbolFields.FilePath].AsString();
+            set => this.Set((int)WixBalBAFactorySymbolFields.FilePath, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixBalBAFunctionsSymbol.cs b/src/ext/Bal/wixext/Symbols/WixBalBAFunctionsSymbol.cs
new file mode 100644
index 00000000..19c7602d
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixBalBAFunctionsSymbol.cs
@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixBalBAFunctions = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixBalBAFunctions.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixBalBAFunctionsSymbolFields.PayloadId), IntermediateFieldType.String),
+            },
+            typeof(WixBalBAFunctionsSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixBalBAFunctionsSymbolFields
+    {
+        PayloadId,
+    }
+
+    public class WixBalBAFunctionsSymbol : IntermediateSymbol
+    {
+        public WixBalBAFunctionsSymbol() : base(BalSymbolDefinitions.WixBalBAFunctions, null, null)
+        {
+        }
+
+        public WixBalBAFunctionsSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixBalBAFunctions, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixBalBAFunctionsSymbolFields index] => this.Fields[(int)index];
+
+        public string PayloadId
+        {
+            get => this.Fields[(int)WixBalBAFunctionsSymbolFields.PayloadId].AsString();
+            set => this.Set((int)WixBalBAFunctionsSymbolFields.PayloadId, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixBalConditionSymbol.cs b/src/ext/Bal/wixext/Symbols/WixBalConditionSymbol.cs
new file mode 100644
index 00000000..c2527fbc
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixBalConditionSymbol.cs
@@ -0,0 +1,55 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixBalCondition = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixBalCondition.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixBalConditionSymbolFields.Condition), IntermediateFieldType.String),
+                new IntermediateFieldDefinition(nameof(WixBalConditionSymbolFields.Message), IntermediateFieldType.String),
+            },
+            typeof(WixBalConditionSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixBalConditionSymbolFields
+    {
+        Condition,
+        Message,
+    }
+
+    public class WixBalConditionSymbol : IntermediateSymbol
+    {
+        public WixBalConditionSymbol() : base(BalSymbolDefinitions.WixBalCondition, null, null)
+        {
+        }
+
+        public WixBalConditionSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixBalCondition, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixBalConditionSymbolFields index] => this.Fields[(int)index];
+
+        public string Condition
+        {
+            get => this.Fields[(int)WixBalConditionSymbolFields.Condition].AsString();
+            set => this.Set((int)WixBalConditionSymbolFields.Condition, value);
+        }
+
+        public string Message
+        {
+            get => this.Fields[(int)WixBalConditionSymbolFields.Message].AsString();
+            set => this.Set((int)WixBalConditionSymbolFields.Message, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixBalPackageInfoSymbol.cs b/src/ext/Bal/wixext/Symbols/WixBalPackageInfoSymbol.cs
new file mode 100644
index 00000000..b09cb191
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixBalPackageInfoSymbol.cs
@@ -0,0 +1,55 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixBalPackageInfo = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixBalPackageInfo.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixBalPackageInfoSymbolFields.PackageId), IntermediateFieldType.String),
+                new IntermediateFieldDefinition(nameof(WixBalPackageInfoSymbolFields.DisplayInternalUICondition), IntermediateFieldType.String),
+            },
+            typeof(WixBalPackageInfoSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixBalPackageInfoSymbolFields
+    {
+        PackageId,
+        DisplayInternalUICondition,
+    }
+
+    public class WixBalPackageInfoSymbol : IntermediateSymbol
+    {
+        public WixBalPackageInfoSymbol() : base(BalSymbolDefinitions.WixBalPackageInfo, null, null)
+        {
+        }
+
+        public WixBalPackageInfoSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixBalPackageInfo, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixBalPackageInfoSymbolFields index] => this.Fields[(int)index];
+
+        public string PackageId
+        {
+            get => this.Fields[(int)WixBalPackageInfoSymbolFields.PackageId].AsString();
+            set => this.Set((int)WixBalPackageInfoSymbolFields.PackageId, value);
+        }
+
+        public string DisplayInternalUICondition
+        {
+            get => this.Fields[(int)WixBalPackageInfoSymbolFields.DisplayInternalUICondition].AsString();
+            set => this.Set((int)WixBalPackageInfoSymbolFields.DisplayInternalUICondition, value);
+        }
+    }
+}
diff --git a/src/ext/Bal/wixext/Symbols/WixDncOptionsSymbol.cs b/src/ext/Bal/wixext/Symbols/WixDncOptionsSymbol.cs
new file mode 100644
index 00000000..b9a41c21
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixDncOptionsSymbol.cs
@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixDncOptions = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixDncOptions.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixDncOptionsSymbolFields.SelfContainedDeployment), IntermediateFieldType.Number),
+            },
+            typeof(WixDncOptionsSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixDncOptionsSymbolFields
+    {
+        SelfContainedDeployment,
+    }
+
+    public class WixDncOptionsSymbol : IntermediateSymbol
+    {
+        public WixDncOptionsSymbol() : base(BalSymbolDefinitions.WixDncOptions, null, null)
+        {
+        }
+
+        public WixDncOptionsSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixDncOptions, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixDncOptionsSymbolFields index] => this.Fields[(int)index];
+
+        public int SelfContainedDeployment
+        {
+            get => this.Fields[(int)WixDncOptionsSymbolFields.SelfContainedDeployment].AsNumber();
+            set => this.Set((int)WixDncOptionsSymbolFields.SelfContainedDeployment, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixMbaPrereqInformationSymbol.cs b/src/ext/Bal/wixext/Symbols/WixMbaPrereqInformationSymbol.cs
new file mode 100644
index 00000000..e4d78da0
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixMbaPrereqInformationSymbol.cs
@@ -0,0 +1,63 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixMbaPrereqInformation = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixMbaPrereqInformation.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixMbaPrereqInformationSymbolFields.PackageId), IntermediateFieldType.String),
+                new IntermediateFieldDefinition(nameof(WixMbaPrereqInformationSymbolFields.LicenseFile), IntermediateFieldType.String),
+                new IntermediateFieldDefinition(nameof(WixMbaPrereqInformationSymbolFields.LicenseUrl), IntermediateFieldType.String),
+            },
+            typeof(WixMbaPrereqInformationSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixMbaPrereqInformationSymbolFields
+    {
+        PackageId,
+        LicenseFile,
+        LicenseUrl,
+    }
+
+    public class WixMbaPrereqInformationSymbol : IntermediateSymbol
+    {
+        public WixMbaPrereqInformationSymbol() : base(BalSymbolDefinitions.WixMbaPrereqInformation, null, null)
+        {
+        }
+
+        public WixMbaPrereqInformationSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixMbaPrereqInformation, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixMbaPrereqInformationSymbolFields index] => this.Fields[(int)index];
+
+        public string PackageId
+        {
+            get => this.Fields[(int)WixMbaPrereqInformationSymbolFields.PackageId].AsString();
+            set => this.Set((int)WixMbaPrereqInformationSymbolFields.PackageId, value);
+        }
+
+        public string LicenseFile
+        {
+            get => this.Fields[(int)WixMbaPrereqInformationSymbolFields.LicenseFile].AsString();
+            set => this.Set((int)WixMbaPrereqInformationSymbolFields.LicenseFile, value);
+        }
+
+        public string LicenseUrl
+        {
+            get => this.Fields[(int)WixMbaPrereqInformationSymbolFields.LicenseUrl].AsString();
+            set => this.Set((int)WixMbaPrereqInformationSymbolFields.LicenseUrl, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixStdbaOptionsSymbol.cs b/src/ext/Bal/wixext/Symbols/WixStdbaOptionsSymbol.cs
new file mode 100644
index 00000000..cb2694da
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixStdbaOptionsSymbol.cs
@@ -0,0 +1,79 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixStdbaOptions = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixStdbaOptions.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixStdbaOptionsSymbolFields.SuppressOptionsUI), IntermediateFieldType.Number),
+                new IntermediateFieldDefinition(nameof(WixStdbaOptionsSymbolFields.SuppressDowngradeFailure), IntermediateFieldType.Number),
+                new IntermediateFieldDefinition(nameof(WixStdbaOptionsSymbolFields.SuppressRepair), IntermediateFieldType.Number),
+                new IntermediateFieldDefinition(nameof(WixStdbaOptionsSymbolFields.ShowVersion), IntermediateFieldType.Number),
+                new IntermediateFieldDefinition(nameof(WixStdbaOptionsSymbolFields.SupportCacheOnly), IntermediateFieldType.Number),
+            },
+            typeof(WixStdbaOptionsSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixStdbaOptionsSymbolFields
+    {
+        SuppressOptionsUI,
+        SuppressDowngradeFailure,
+        SuppressRepair,
+        ShowVersion,
+        SupportCacheOnly,
+    }
+
+    public class WixStdbaOptionsSymbol : IntermediateSymbol
+    {
+        public WixStdbaOptionsSymbol() : base(BalSymbolDefinitions.WixStdbaOptions, null, null)
+        {
+        }
+
+        public WixStdbaOptionsSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixStdbaOptions, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixStdbaOptionsSymbolFields index] => this.Fields[(int)index];
+
+        public int SuppressOptionsUI
+        {
+            get => this.Fields[(int)WixStdbaOptionsSymbolFields.SuppressOptionsUI].AsNumber();
+            set => this.Set((int)WixStdbaOptionsSymbolFields.SuppressOptionsUI, value);
+        }
+
+        public int SuppressDowngradeFailure
+        {
+            get => this.Fields[(int)WixStdbaOptionsSymbolFields.SuppressDowngradeFailure].AsNumber();
+            set => this.Set((int)WixStdbaOptionsSymbolFields.SuppressDowngradeFailure, value);
+        }
+
+        public int SuppressRepair
+        {
+            get => this.Fields[(int)WixStdbaOptionsSymbolFields.SuppressRepair].AsNumber();
+            set => this.Set((int)WixStdbaOptionsSymbolFields.SuppressRepair, value);
+        }
+
+        public int ShowVersion
+        {
+            get => this.Fields[(int)WixStdbaOptionsSymbolFields.ShowVersion].AsNumber();
+            set => this.Set((int)WixStdbaOptionsSymbolFields.ShowVersion, value);
+        }
+
+        public int SupportCacheOnly
+        {
+            get => this.Fields[(int)WixStdbaOptionsSymbolFields.SupportCacheOnly].AsNumber();
+            set => this.Set((int)WixStdbaOptionsSymbolFields.SupportCacheOnly, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/Symbols/WixStdbaOverridableVariableSymbol.cs b/src/ext/Bal/wixext/Symbols/WixStdbaOverridableVariableSymbol.cs
new file mode 100644
index 00000000..1d84d1aa
--- /dev/null
+++ b/src/ext/Bal/wixext/Symbols/WixStdbaOverridableVariableSymbol.cs
@@ -0,0 +1,47 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bal
+{
+    using WixToolset.Data;
+    using WixToolset.Bal.Symbols;
+
+    public static partial class BalSymbolDefinitions
+    {
+        public static readonly IntermediateSymbolDefinition WixStdbaOverridableVariable = new IntermediateSymbolDefinition(
+            BalSymbolDefinitionType.WixStdbaOverridableVariable.ToString(),
+            new[]
+            {
+                new IntermediateFieldDefinition(nameof(WixStdbaOverridableVariableSymbolFields.Name), IntermediateFieldType.String),
+            },
+            typeof(WixStdbaOverridableVariableSymbol));
+    }
+}
+
+namespace WixToolset.Bal.Symbols
+{
+    using WixToolset.Data;
+
+    public enum WixStdbaOverridableVariableSymbolFields
+    {
+        Name,
+    }
+
+    public class WixStdbaOverridableVariableSymbol : IntermediateSymbol
+    {
+        public WixStdbaOverridableVariableSymbol() : base(BalSymbolDefinitions.WixStdbaOverridableVariable, null, null)
+        {
+        }
+
+        public WixStdbaOverridableVariableSymbol(SourceLineNumber sourceLineNumber, Identifier id = null) : base(BalSymbolDefinitions.WixStdbaOverridableVariable, sourceLineNumber, id)
+        {
+        }
+
+        public IntermediateField this[WixStdbaOverridableVariableSymbolFields index] => this.Fields[(int)index];
+
+        public string Name
+        {
+            get => this.Fields[(int)WixStdbaOverridableVariableSymbolFields.Name].AsString();
+            set => this.Set((int)WixStdbaOverridableVariableSymbolFields.Name, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ext/Bal/wixext/WixToolset.Bal.wixext.csproj b/src/ext/Bal/wixext/WixToolset.Bal.wixext.csproj
new file mode 100644
index 00000000..00451403
--- /dev/null
+++ b/src/ext/Bal/wixext/WixToolset.Bal.wixext.csproj
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <RootNamespace>WixToolset.Bal</RootNamespace>
+    <Description>WiX Toolset Bal Extension</Description>
+    <Title>WiX Toolset Bal Extension</Title>
+    <DebugType>embedded</DebugType>
+    <NuspecFile>$(MSBuildThisFileName).nuspec</NuspecFile>
+    <IncludeSymbols>true</IncludeSymbols>
+    <NuspecProperties>Id=$(MSBuildThisFileName);Authors=$(Authors);Copyright=$(Copyright);Description=$(Description);Title=$(Title)</NuspecProperties>
+  </PropertyGroup>
+  <ItemGroup>
+    <Content Include="$(MSBuildThisFileName).targets" />
+    <EmbeddedResource Include="$(OutputPath)..\bal.wixlib" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Data" Version="4.0.*" PrivateAssets="all" />
+    <PackageReference Include="WixToolset.Extensibility" Version="4.0.*" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\wixlib\bal.wixproj" ReferenceOutputAssembly="false" Condition=" '$(NCrunch)'=='' " />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="all" />
+  </ItemGroup>
+
+  <Target Name="SetNuspecProperties" DependsOnTargets="InitializeSourceControlInformation" AfterTargets="GetBuildVersion">
+    <PropertyGroup>
+      <NuspecBasePath>$(OutputPath)..\</NuspecBasePath>
+      <NuspecProperties>$(NuspecProperties);Version=$(BuildVersionSimple);RepositoryCommit=$(SourceRevisionId);RepositoryType=$(RepositoryType);RepositoryUrl=$(PrivateRepositoryUrl);ProjectFolder=$(MSBuildThisFileDirectory)</NuspecProperties>
+    </PropertyGroup>
+  </Target>
+</Project>
diff --git a/src/ext/Bal/wixext/WixToolset.Bal.wixext.nuspec b/src/ext/Bal/wixext/WixToolset.Bal.wixext.nuspec
new file mode 100644
index 00000000..d9e704ae
--- /dev/null
+++ b/src/ext/Bal/wixext/WixToolset.Bal.wixext.nuspec
@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata minClientVersion="4.0">
+    <id>$id$</id>
+    <version>$version$</version>
+    <authors>$authors$</authors>
+    <owners>$authors$</owners>
+    <license type="expression">MS-RL</license>
+    <projectUrl>https://github.com/wixtoolset/Bal.wixext</projectUrl>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <title>$title$</title>
+    <description>$description$</description>
+    <copyright>$copyright$</copyright>
+    <repository type="$repositorytype$" url="$repositoryurl$" commit="$repositorycommit$" />
+  </metadata>
+
+  <files>
+    <file src="$projectFolder$$id$.targets" target="build" />
+
+    <file src="netstandard2.0\$id$.dll" target="tools" />
+
+    <file src="x86\*.pdb" target="pdbs\x86" />
+    <file src="x64\*.pdb" target="pdbs\x64" />
+    <file src="ARM64\*.pdb" target="pdbs\ARM64" />
+  </files>
+</package>
diff --git a/src/ext/Bal/wixext/WixToolset.Bal.wixext.targets b/src/ext/Bal/wixext/WixToolset.Bal.wixext.targets
new file mode 100644
index 00000000..70c5a19c
--- /dev/null
+++ b/src/ext/Bal/wixext/WixToolset.Bal.wixext.targets
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
+  <PropertyGroup>
+    <WixToolsetBalWixextPath Condition=" '$(WixToolsetBalWixextPath)' == '' ">$(MSBuildThisFileDirectory)..\tools\WixToolset.Bal.wixext.dll</WixToolsetBalWixextPath>
+  </PropertyGroup>
+  <ItemGroup>
+    <WixExtension Include="$(WixToolsetBalWixextPath)" />
+  </ItemGroup>
+</Project>
diff --git a/src/ext/Bal/wixlib/BalExtension_arm64.wxs b/src/ext/Bal/wixlib/BalExtension_arm64.wxs
new file mode 100644
index 00000000..1b9e11d2
--- /dev/null
+++ b/src/ext/Bal/wixlib/BalExtension_arm64.wxs
@@ -0,0 +1,7 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <?define platform=arm64 ?>
+    <?include BalExtension_platform.wxi ?>
+</Wix>
diff --git a/src/ext/Bal/wixlib/BalExtension_platform.wxi b/src/ext/Bal/wixlib/BalExtension_platform.wxi
new file mode 100644
index 00000000..33122fb2
--- /dev/null
+++ b/src/ext/Bal/wixlib/BalExtension_platform.wxi
@@ -0,0 +1,69 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Include xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <?include caDecor.wxi ?>
+    <Fragment>
+        <BootstrapperApplication Id="WixDotNetCoreBootstrapperApplicationHost$(var.Suffix)">
+            <BootstrapperApplicationDll Id="WixDotNetCoreBootstrapperApplicationHost" SourceFile="!(bindpath.$(var.platform))\dnchost.dll" />
+            <Payload SourceFile="!(bindpath.$(var.platform))\wixstdba.dll" Name="dncpreq.dll" />
+            <PayloadGroupRef Id="WixDotNetCoreBootstrapperApplicationHostManagedPayloads" />
+        </BootstrapperApplication>
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixDotNetCoreBootstrapperApplicationHost.Standard$(var.Suffix)">
+            <PayloadGroupRef Id="DncPreqStandardPayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixDotNetCoreBootstrapperApplicationHost$(var.Suffix)" />
+    </Fragment>
+    
+    <Fragment>
+        <BootstrapperApplication Id="WixManagedBootstrapperApplicationHost$(var.Suffix)">
+            <BootstrapperApplicationDll Id="WixManagedBootstrapperApplicationHost" SourceFile="!(bindpath.$(var.platform))\mbahost.dll" />
+            <Payload SourceFile="!(bindpath.$(var.platform))\wixstdba.dll" Name="mbapreq.dll" />
+            <PayloadGroupRef Id="WixManagedBootstrapperApplicationHostManagedPayloads" />
+        </BootstrapperApplication>
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixManagedBootstrapperApplicationHost.Standard$(var.Suffix)">
+            <PayloadGroupRef Id="MbaPreqStandardPayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixManagedBootstrapperApplicationHost$(var.Suffix)" />
+    </Fragment>
+
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication$(var.Suffix)">
+            <BootstrapperApplicationDll Id="WixStandardBootstrapperApplication" SourceFile="!(bindpath.$(var.platform))\wixstdba.dll" />
+        </BootstrapperApplication>
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication.RtfLicense$(var.Suffix)">
+            <PayloadGroupRef Id="WixStdbaRtfLicensePayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication$(var.Suffix)" />
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication.RtfLargeLicense$(var.Suffix)">
+            <PayloadGroupRef Id="WixStdbaRtfLargeLicensePayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication$(var.Suffix)" />
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication.HyperlinkLicense$(var.Suffix)">
+            <PayloadGroupRef Id="WixStdbaHyperlinkLicensePayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication$(var.Suffix)" />
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication.HyperlinkLargeLicense$(var.Suffix)">
+            <PayloadGroupRef Id="WixStdbaHyperlinkLargeLicensePayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication$(var.Suffix)" />
+    </Fragment>
+    <Fragment>
+        <BootstrapperApplication Id="WixStandardBootstrapperApplication.HyperlinkSidebarLicense$(var.Suffix)">
+            <PayloadGroupRef Id="WixStdbaHyperlinkSidebarLicensePayloads" />
+        </BootstrapperApplication>
+        <BootstrapperApplicationRef Id="WixStandardBootstrapperApplication$(var.Suffix)" />
+    </Fragment>
+</Include>
diff --git a/src/ext/Bal/wixlib/BalExtension_x64.wxs b/src/ext/Bal/wixlib/BalExtension_x64.wxs
new file mode 100644
index 00000000..69a597ae
--- /dev/null
+++ b/src/ext/Bal/wixlib/BalExtension_x64.wxs
@@ -0,0 +1,7 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <?define platform=x64 ?>
+    <?include BalExtension_platform.wxi ?>
+</Wix>
diff --git a/src/ext/Bal/wixlib/BalExtension_x86.wxs b/src/ext/Bal/wixlib/BalExtension_x86.wxs
new file mode 100644
index 00000000..3cdd4015
--- /dev/null
+++ b/src/ext/Bal/wixlib/BalExtension_x86.wxs
@@ -0,0 +1,7 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <?define platform=x86 ?>
+    <?include BalExtension_platform.wxi ?>
+</Wix>
diff --git a/src/ext/Bal/wixlib/Dnc.wxs b/src/ext/Bal/wixlib/Dnc.wxs
new file mode 100644
index 00000000..d777c473
--- /dev/null
+++ b/src/ext/Bal/wixlib/Dnc.wxs
@@ -0,0 +1,20 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <!--
+     Dnc.wxs - .NET Core BA resources.
+    -->
+    <Fragment>
+        <PayloadGroup Id="WixDotNetCoreBootstrapperApplicationHostManagedPayloads">
+            <Payload SourceFile="WixToolset.Dnc.Host.dll" />
+        </PayloadGroup>
+    </Fragment>
+    <Fragment>
+        <PayloadGroup Id="DncPreqStandardPayloads">
+            <Payload Name="mbapreq.thm" SourceFile="!(wix.DncPreqbaThemeXml=SourceDir\dncpreq.thm)" />
+            <Payload Name="mbapreq.png" SourceFile="!(wix.DncPreqbaLogo=SourceDir\mbapreq.png)" />
+            <Payload Name="mbapreq.wxl" SourceFile="!(wix.DncPreqbaThemeWxl=SourceDir\dncpreq.wxl)" />
+        </PayloadGroup>
+    </Fragment>
+</Wix>
diff --git a/src/ext/Bal/wixlib/Mba.wxs b/src/ext/Bal/wixlib/Mba.wxs
new file mode 100644
index 00000000..2d407c88
--- /dev/null
+++ b/src/ext/Bal/wixlib/Mba.wxs
@@ -0,0 +1,43 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <!--
+     Mba.wxs - Managed BA resources.
+    -->
+    <Fragment>
+        <PayloadGroup Id="WixManagedBootstrapperApplicationHostManagedPayloads">
+            <Payload SourceFile="WixToolset.Mba.Host.dll" />
+        </PayloadGroup>
+    </Fragment>
+    <Fragment>
+        <PayloadGroup Id="MbaPreqStandardPayloads">
+            <Payload Name="mbapreq.thm" SourceFile="!(wix.PreqbaThemeXml=SourceDir\mbapreq.thm)" />
+            <Payload Name="mbapreq.png" SourceFile="!(wix.PreqbaLogo=SourceDir\mbapreq.png)" />
+            <Payload Name="mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl=SourceDir\mbapreq.wxl)" />
+            <Payload Name="1028\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1028=SourceDir\1028\mbapreq.wxl)" />
+            <Payload Name="1029\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1029=SourceDir\1029\mbapreq.wxl)" />
+            <Payload Name="1030\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1030=SourceDir\1030\mbapreq.wxl)" />
+            <Payload Name="1031\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1031=SourceDir\1031\mbapreq.wxl)" />
+            <Payload Name="1032\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1032=SourceDir\1032\mbapreq.wxl)" />
+            <Payload Name="1035\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1035=SourceDir\1035\mbapreq.wxl)" />
+            <Payload Name="1036\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1036=SourceDir\1036\mbapreq.wxl)" />
+            <Payload Name="1038\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1038=SourceDir\1038\mbapreq.wxl)" />
+            <Payload Name="1040\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1040=SourceDir\1040\mbapreq.wxl)" />
+            <Payload Name="1041\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1041=SourceDir\1041\mbapreq.wxl)" />
+            <Payload Name="1042\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1042=SourceDir\1042\mbapreq.wxl)" />
+            <Payload Name="1043\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1043=SourceDir\1043\mbapreq.wxl)" />
+            <Payload Name="1044\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1044=SourceDir\1044\mbapreq.wxl)" />
+            <Payload Name="1045\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1045=SourceDir\1045\mbapreq.wxl)" />
+            <Payload Name="1046\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1046=SourceDir\1046\mbapreq.wxl)" />
+            <Payload Name="1049\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1049=SourceDir\1049\mbapreq.wxl)" />
+            <Payload Name="1051\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1051=SourceDir\1051\mbapreq.wxl)" />
+            <Payload Name="1053\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1053=SourceDir\1053\mbapreq.wxl)" />
+            <Payload Name="1055\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1055=SourceDir\1055\mbapreq.wxl)" />
+            <Payload Name="1060\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl1060=SourceDir\1060\mbapreq.wxl)" />
+            <Payload Name="2052\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl2052=SourceDir\2052\mbapreq.wxl)" />
+            <Payload Name="2070\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl2070=SourceDir\2070\mbapreq.wxl)" />
+            <Payload Name="3082\mbapreq.wxl" SourceFile="!(wix.PreqbaThemeWxl3082=SourceDir\3082\mbapreq.wxl)" />
+        </PayloadGroup>
+    </Fragment>
+</Wix>
diff --git a/src/ext/Bal/wixlib/bal.wixproj b/src/ext/Bal/wixlib/bal.wixproj
new file mode 100644
index 00000000..fdcc7475
--- /dev/null
+++ b/src/ext/Bal/wixlib/bal.wixproj
@@ -0,0 +1,36 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk" ToolsVersion="4.0">
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <BindFiles>true</BindFiles>
+    <Cultures>en-us</Cultures>
+  </PropertyGroup>
+  <ItemGroup>
+    <BindInputPaths Include="..\wixstdba\Resources\" />
+    <BindInputPaths Include="$(OutputPath)netcoreapp3.1" />
+    <BindInputPaths Include="$(OutputPath)net20" />
+    <BindInputPaths Include="$(OutputPath)x86" BindName="x86" />
+    <BindInputPaths Include="$(OutputPath)x64" BindName="x64" />
+    <BindInputPaths Include="$(OutputPath)arm64" BindName="arm64" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\dnchost\dnchost.vcxproj" Properties="Platform=ARM64" />
+    <ProjectReference Include="..\mbahost\mbahost.vcxproj" Properties="Platform=ARM64" />
+    <ProjectReference Include="..\wixstdba\wixstdba.vcxproj" Properties="Platform=ARM64" />
+    <ProjectReference Include="..\dnchost\dnchost.vcxproj" Properties="Platform=x86" />
+    <ProjectReference Include="..\mbahost\mbahost.vcxproj" Properties="Platform=x86" />
+    <ProjectReference Include="..\wixstdba\wixstdba.vcxproj" Properties="Platform=x86" />
+    <ProjectReference Include="..\dnchost\dnchost.vcxproj" Properties="Platform=x64" />
+    <ProjectReference Include="..\mbahost\mbahost.vcxproj" Properties="Platform=x64" />
+    <ProjectReference Include="..\wixstdba\wixstdba.vcxproj" Properties="Platform=x64" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.3.37" PrivateAssets="All" />
+  </ItemGroup>
+  <!-- Workaround for bug in ProjectReferenceDefineConstants, they're not needed for this project anyway -->
+  <Target Name="ClearProjectReferenceDefineConstants" AfterTargets="CalculateDefineConstants">
+    <PropertyGroup>
+      <ProjectReferenceDefineConstants></ProjectReferenceDefineConstants>
+    </PropertyGroup>
+  </Target>
+</Project>
\ No newline at end of file
diff --git a/src/ext/Bal/wixlib/caDecor.wxi b/src/ext/Bal/wixlib/caDecor.wxi
new file mode 100644
index 00000000..b1711518
--- /dev/null
+++ b/src/ext/Bal/wixlib/caDecor.wxi
@@ -0,0 +1,39 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Include xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <?ifdef Prefix ?>
+        <?undef Prefix ?>
+    <?endif?>
+
+    <?define Prefix="Wix4" ?>
+
+    <?ifndef platform ?>
+        <?define platform="x86" ?>
+    <?endif?>
+
+    <?if $(var.platform)="" ?>
+        <?undef platform ?>
+        <?define platform="x86" ?>
+    <?endif?>
+
+    <?ifdef Suffix ?>
+        <?undef Suffix ?>
+    <?endif?>
+
+    <?if $(var.platform)~="x86" ?>
+        <?define Suffix="_X86" ?>
+    <?endif?>
+
+    <?if $(var.platform)~="x64" ?>
+        <?define Suffix="_X64" ?>
+    <?endif?>
+
+    <?if $(var.platform)~="arm" ?>
+        <?define Suffix="_A32" ?>
+    <?endif?>
+
+    <?if $(var.platform)~="arm64" ?>
+        <?define Suffix="_A64" ?>
+    <?endif?>
+</Include>
diff --git a/src/ext/Bal/wixlib/wixstdba.wxs b/src/ext/Bal/wixlib/wixstdba.wxs
new file mode 100644
index 00000000..8181b9b4
--- /dev/null
+++ b/src/ext/Bal/wixlib/wixstdba.wxs
@@ -0,0 +1,92 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <!-- RTF License Payload Group -->
+    <Fragment>
+        <PayloadGroup Id="WixStdbaRtfLicensePayloads">
+            <Payload Name="thm.xml" Compressed="yes" SourceFile="!(wix.WixStdbaThemeXml=RtfTheme.xml)" />
+            <Payload Name="thm.wxl" Compressed="yes" SourceFile="!(wix.WixStdbaThemeWxl=RtfTheme.wxl)" />
+            <Payload Name="logo.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogo=logo.png)" />
+
+            <Payload Name="!(wix.WixStdbaLicenseRtfName=license.rtf)" Compressed="yes" SourceFile="!(wix.WixStdbaLicenseRtf=LoremIpsumLicense.rtf)" />
+        </PayloadGroup>
+
+        <BundleCustomDataRef Id="WixStdbaInformation">
+            <BundleElement>
+                <BundleAttribute Id="LicenseFile" Value="!(wix.WixStdbaLicenseRtfName=license.rtf)" />
+            </BundleElement>
+        </BundleCustomDataRef>
+    </Fragment>
+
+    <!-- RTF Large License Payload Group -->
+    <Fragment>
+        <PayloadGroup Id="WixStdbaRtfLargeLicensePayloads">
+            <Payload Name="thm.xml" Compressed="yes" SourceFile="!(wix.WixStdbaThemeXml=RtfLargeTheme.xml)" />
+            <Payload Name="thm.wxl" Compressed="yes" SourceFile="!(wix.WixStdbaThemeWxl=RtfTheme.wxl)" />
+            <Payload Name="logo.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogo=logo.png)" />
+
+            <Payload Name="!(wix.WixStdbaLicenseRtfName=license.rtf)" Compressed="yes" SourceFile="!(wix.WixStdbaLicenseRtf=LoremIpsumLicense.rtf)" />
+        </PayloadGroup>
+
+        <BundleCustomDataRef Id="WixStdbaInformation">
+            <BundleElement>
+                <BundleAttribute Id="LicenseFile" Value="!(wix.WixStdbaLicenseRtfName=license.rtf)" />
+            </BundleElement>
+        </BundleCustomDataRef>
+    </Fragment>
+
+    <!-- Hyperlink License Payload Group -->
+    <Fragment>
+        <PayloadGroup Id="WixStdbaHyperlinkLicensePayloads">
+            <Payload Name="thm.xml" Compressed="yes" SourceFile="!(wix.WixStdbaThemeXml=HyperlinkTheme.xml)" />
+            <Payload Name="thm.wxl" Compressed="yes" SourceFile="!(wix.WixStdbaThemeWxl=HyperlinkTheme.wxl)" />
+            <Payload Name="logo.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogo=logo.png)" />
+        </PayloadGroup>
+
+        <BundleCustomDataRef Id="WixStdbaInformation">
+            <BundleElement>
+                <BundleAttribute Id="LicenseUrl" Value="!(wix.WixStdbaLicenseUrl)" />
+            </BundleElement>
+        </BundleCustomDataRef>
+    </Fragment>
+
+    <!-- Hyperlink Large License Payload Group -->
+    <Fragment>
+        <PayloadGroup Id="WixStdbaHyperlinkLargeLicensePayloads">
+            <Payload Name="thm.xml" Compressed="yes" SourceFile="!(wix.WixStdbaThemeXml=HyperlinkLargeTheme.xml)" />
+            <Payload Name="thm.wxl" Compressed="yes" SourceFile="!(wix.WixStdbaThemeWxl=HyperlinkTheme.wxl)" />
+            <Payload Name="logo.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogo=logo.png)" />
+        </PayloadGroup>
+
+        <BundleCustomDataRef Id="WixStdbaInformation">
+            <BundleElement>
+                <BundleAttribute Id="LicenseUrl" Value="!(wix.WixStdbaLicenseUrl)" />
+            </BundleElement>
+        </BundleCustomDataRef>
+    </Fragment>
+
+    <!-- HyperlinkSidebar License Payload Group -->
+    <Fragment>
+        <PayloadGroup Id="WixStdbaHyperlinkSidebarLicensePayloads">
+            <Payload Name="thm.xml" Compressed="yes" SourceFile="!(wix.WixStdbaThemeXml=HyperlinkSidebarTheme.xml)" />
+            <Payload Name="thm.wxl" Compressed="yes" SourceFile="!(wix.WixStdbaThemeWxl=HyperlinkTheme.wxl)" />
+            <Payload Name="logo.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogo=logo.png)" />
+            <Payload Name="logoside.png" Compressed="yes" SourceFile="!(wix.WixStdbaLogoSide=logoside.png)" />
+        </PayloadGroup>
+
+        <BundleCustomDataRef Id="WixStdbaInformation">
+            <BundleElement>
+                <BundleAttribute Id="LicenseUrl" Value="!(wix.WixStdbaLicenseUrl)" />
+            </BundleElement>
+        </BundleCustomDataRef>
+    </Fragment>
+
+    <!-- BootstrapperApplicationData tables definition -->
+    <Fragment>
+        <BundleCustomData Id="WixStdbaInformation">
+            <BundleAttributeDefinition Id="LicenseFile" />
+            <BundleAttributeDefinition Id="LicenseUrl" />
+        </BundleCustomData>
+    </Fragment>
+</Wix>
diff --git a/src/ext/Bal/wixstdba/Resources/1028/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1028/mbapreq.wxl
new file mode 100644
index 00000000..abd35ac7
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1028/mbapreq.wxl
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="zh-tw" Language="1028" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] 安裝程式</String>
+  <String Id="Title">[WixBundleName] 安裝程式需要 Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">您確定要取消嗎?</String>
+  <String Id="HelpHeader">安裝程式說明</String>
+  <String Id="HelpText">/passive | /quiet -  顯示最基本的 UI 但不顯示提示，或者不顯示 UI 也
+   不顯示提示。預設會顯示 UI 和所有提示。
+
+/norestart   - 隱藏任何重新啟動嘗試。根據預設，UI 會在重新啟動之前提示。
+/log log.txt - 記錄至特定檔案。預設會在 %TEMP% 建立記錄檔。</String>
+  <String Id="HelpCloseButton">關閉(&amp;C)</String>
+  <String Id="InstallLicenseTerms">請按一下 「接受並安裝」5D; 按鈕，接受 Microsoft .NET Framework &lt;a href="#"&gt;授權合約&lt;/a&gt;。</String>
+  <String Id="InstallAcceptAndInstallButton">接受並安裝(&amp;A)</String>
+  <String Id="InstallDeclineButton">拒絕(&amp;D)</String>
+  <String Id="ProgressHeader">安裝進度</String>
+  <String Id="ProgressLabel">正在處理:</String>
+  <String Id="ProgressCancelButton">取消(&amp;)</String>
+  <String Id="FailureHeader">安裝失敗</String>
+  <String Id="FailureLogLinkText">一或多個問題導致安裝失敗。請修正這些問題，然後再重試安裝。如需詳細資訊，請查看&lt;a href="#"&gt;記錄檔&lt;/a&gt;。</String>
+  <String Id="FailureRestartText">必須重新啟動電腦，才能完成軟體的復原。</String>
+  <String Id="FailureRestartButton">重新啟動(&amp;R)</String>
+  <String Id="FailureCloseButton">關閉(&amp;C)</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1029/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1029/mbapreq.wxl
new file mode 100644
index 00000000..e28b4f74
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1029/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="cs-cz" Language="1029" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Instalace produktu [WixBundleName]</String>
+  <String Id="Title">Pro instalaci produktu [WixBundleName] je vyžadováno rozhraní Microsoft .NET Framework.</String>
+  <String Id="ConfirmCancelMessage">Opravdu chcete akci zrušit?</String>
+  <String Id="HelpHeader">Nápověda k instalaci</String>
+  <String Id="HelpText">/passive | /quiet -  Zobrazí minimální uživatelské rozhraní bez jakýchkoli
+   výzev, nebo nezobrazí žádné uživatelské rozhraní ani žádné výzvy. Ve výchozím
+   nastavení  se jak uživatelské rozhraní, tak i všechny výzvy zobrazují.
+
+/norestart   - Potlačí jakékoli pokusy o restartování. Ve výchozím nastavení
+   se v uživatelském rozhraní před restartováním zobrazí výzva.
+/log log.txt - Nastaví, že se má zapisovat do konkrétního souboru protokolu.
+   Ve výchozím nastavení je soubor protokolu vytvořen v umístění %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Zavřít</String>
+  <String Id="InstallLicenseTerms">Kliknutím na tlačítko Přijmout a nainstalovat přijmete &lt;a href="#"&gt;licenční podmínky&lt;/a&gt; rozhraní Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Přijmout a instalovat</String>
+  <String Id="InstallDeclineButton">&amp;Odmítnout</String>
+  <String Id="ProgressHeader">Průběh instalace</String>
+  <String Id="ProgressLabel">Probíhá zpracování:</String>
+  <String Id="ProgressCancelButton">&amp;Storno</String>
+  <String Id="FailureHeader">Instalace se nezdařila</String>
+  <String Id="FailureLogLinkText">Byly zjištěny problémy, kvůli kterým se instalaci nepodařilo dokončit. Odstraňte tyto problémy a potom instalaci opakujte. Další informace naleznete v &lt;a href="#"&gt;souboru protokolu&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Aby bylo možné zrušení instalace softwaru dokončit, je nutné počítač restartovat.</String>
+  <String Id="FailureRestartButton">&amp;Restartovat</String>
+  <String Id="FailureCloseButton">&amp;Zavřít</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1030/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1030/mbapreq.wxl
new file mode 100644
index 00000000..a531467a
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1030/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="da-dk" Language="1030" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Installation af [WixBundleName]</String>
+  <String Id="Title">Microsoft .NET Framework skal være installeret i forbindelse med Installationen af [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Er du sikker på, at du vil annullere?</String>
+  <String Id="HelpHeader">Hjælp til installation</String>
+  <String Id="HelpText">/passive | /quiet -  viser en minimal brugergrænseflade uden prompter eller
+   viser ingen brugergrænseflade og ingen prompter.
+   Brugergrænsefladen og alle prompter vises som standard.
+
+/norestart   - skjuler forsøg på genstart. Der vises som standard en
+   forespørgsel i brugergrænsefladen, før der genstartes.
+/log log.txt - logfører til en bestemt fil. Der oprettes som standard en
+  logfil  i %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Luk</String>
+  <String Id="InstallLicenseTerms">Klik på knappen "Acceptér og installér" for at acceptere &lt;a href="#"&gt;licensvilkårene&lt;/a&gt; for Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Acceptér og installér</String>
+  <String Id="InstallDeclineButton">&amp;Afvis</String>
+  <String Id="ProgressHeader">Status for installation</String>
+  <String Id="ProgressLabel">Behandler:</String>
+  <String Id="ProgressCancelButton">&amp;Annuller</String>
+  <String Id="FailureHeader">Installationen blev ikke gennemført</String>
+  <String Id="FailureLogLinkText">Installationen blev ikke gennemført på grund af et eller flere problemer. Løs problemerne, og prøv derefter at installere igen. Se &lt;a href="#"&gt;logfilen&lt;/a&gt; for at få flere oplysninger.</String>
+  <String Id="FailureRestartText">Du skal genstarte computeren for at fuldføre annulleringen af opdateringen af softwaren.</String>
+  <String Id="FailureRestartButton">&amp;Genstart</String>
+  <String Id="FailureCloseButton">&amp;Luk</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1031/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1031/mbapreq.wxl
new file mode 100644
index 00000000..ff8111f9
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1031/mbapreq.wxl
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="de-de" Language="1031" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <UI Control="InstallButton" Width="180" />
+  
+  <String Id="Caption">[WixBundleName]-Setup</String>
+  <String Id="Title">Für das [WixBundleName]-Setup ist Microsoft .NET Framework erforderlich.</String>
+  <String Id="ConfirmCancelMessage">Sind Sie sicher, dass Sie den Vorgang abbrechen möchten?</String>
+  <String Id="HelpHeader">Setup-Hilfe</String>
+  <String Id="HelpText">/passive | /quiet - zeigt eine minimale Benutzeroberfläche ohne
+   Eingabeaufforderungen oder keine Benutzeroberfläche und keine
+   Eingabeaufforderungen an. Standardmäßig werden die Benutzeroberfläche und
+   alle Eingabeaufforderungen angezeigt.
+
+/norestart   - unterdrückt alle Neustartversuche. Standardmäßig fordert die
+   Benutzeroberfläche zum Bestätigen eines Neustarts auf.
+/log log.txt - erstellt das Protokoll in einer bestimmten Datei.
+   Standardmäßig wird die  Protokolldatei in "%TEMP%" erstellt.</String>
+  <String Id="HelpCloseButton">&amp;Schließen</String>
+  <String Id="InstallLicenseTerms">Klicken Sie auf die Schaltfläche "Akzeptieren und installieren", um den Microsoft .NET Framework &lt;a href="#"&gt;-Lizenzbedingungen&lt;/a&gt; zuzustimmen.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Akzeptieren und installieren</String>
+  <String Id="InstallDeclineButton">&amp;Ablehnen</String>
+  <String Id="ProgressHeader">Setup-Status</String>
+  <String Id="ProgressLabel">Verarbeitung:</String>
+  <String Id="ProgressCancelButton">&amp;Abbrechen</String>
+  <String Id="FailureHeader">Setup-Fehler</String>
+  <String Id="FailureLogLinkText">Beim Setup ist aufgrund mindestens eines Problems ein Fehler aufgetreten. Beheben Sie die Probleme, und wiederholen Sie das Setup. Weitere Informationen finden Sie in der &lt;a href="#"&gt;Protokolldatei&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Sie müssen den Computer neu starten, um das Zurücksetzen der Software abzuschließen.</String>
+  <String Id="FailureRestartButton">&amp;Neu starten</String>
+  <String Id="FailureCloseButton">&amp;Schließen</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1032/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1032/mbapreq.wxl
new file mode 100644
index 00000000..bc3703a3
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1032/mbapreq.wxl
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="el-gr" Language="1032" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Εγκατάσταση του [WixBundleName]</String>
+  <String Id="Title">Για την εγκατάσταση του [WixBundleName] απαιτείται το Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">Είστε βέβαιοι ότι θέλετε να γίνει ακύρωση;</String>
+  <String Id="HelpHeader">Βοήθεια για την εγκατάσταση</String>
+  <String Id="HelpText">/passive | /quiet -  εμφανίζει ελάχιστο περιεχόμενο του περιβάλλοντος εργασίας
+   χρήστη χωρίς μηνύματα ή δεν εμφανίζει περιβάλλον εργασίας χρήστη και
+   μηνύματα. Από προεπιλογή, εμφανίζονται όλα τα μηνύματα και το περιβάλλον
+   εργασίας χρήστη.
+
+/norestart   - αποκρύπτει οποιεσδήποτε προσπάθειες για επανεκκίνηση. Από
+   προεπιλογή, το περιβάλλον εργασίας χρήστη θα εμφανίσει μήνυμα πριν από την
+   επανεκκίνηση.
+/log log.txt - πραγματοποιεί καταγραφή σε ένα συγκεκριμένο αρχείο. Από
+   προεπιλογή, δημιουργείται ένα αρχείο καταγραφής στο %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Κλείσιμο</String>
+  <String Id="InstallLicenseTerms">Κάντε κλικ στο κουμπί "Αποδοχή και εγκατάσταση" για να αποδεχτείτε τους &lt;a href="#"&gt;όρους της άδειας χρήσης&lt;/a&gt; του Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Αποδοχή και εγκατάσταση</String>
+  <String Id="InstallDeclineButton">&amp;Απόρριψη</String>
+  <String Id="ProgressHeader">Πρόοδος εγκατάστασης</String>
+  <String Id="ProgressLabel">Επεξεργασία:</String>
+  <String Id="ProgressCancelButton">&amp;Άκυρο</String>
+  <String Id="FailureHeader">Αποτυχία εγκατάστασης</String>
+  <String Id="FailureLogLinkText">Ένα ή περισσότερα προβλήματα προκάλεσαν την αποτυχία της εγκατάστασης. Διορθώστε τα προβλήματα και μετά επαναλάβετε την εγκατάσταση. Για περισσότερες πληροφορίες, ανατρέξτε στο &lt;a href="#"&gt;αρχείο καταγραφής&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Για να ολοκληρωθεί η επαναφορά του λογισμικού, πρέπει να κάνετε επανεκκίνηση του υπολογιστή.</String>
+  <String Id="FailureRestartButton">&amp;Επανεκκίνηση</String>
+  <String Id="FailureCloseButton">&amp;Κλείσιμο</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1035/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1035/mbapreq.wxl
new file mode 100644
index 00000000..859e5b23
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1035/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="fi-fi" Language="1035" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] -asennus</String>
+  <String Id="Title">Microsoft .NET Framework tarvitaan [WixBundleName] -asennusta varten</String>
+  <String Id="ConfirmCancelMessage">Haluatko varmasti peruuttaa?</String>
+  <String Id="HelpHeader">Asennusohjelman ohje</String>
+  <String Id="HelpText">/passive | /quiet -  näyttää mahdollisimman vähän käyttöliittymästä; ei
+   kehotteita tai ei käyttöliittymää ja kehotteita. Oletusarvoisesti
+   käyttöliittymä ja kaikki kehotteet näytetään.
+
+/norestart   - estää uudelleenkäynnistysyritykset. Oletusarvoisesti
+   käyttöliittymä kysyy ennen uudelleenkäynnistystä.
+/log loki.txt - kirjaa lokitiedot erityiseen tiedostoon. Oletusarvoisesti
+   lokitiedosto luodaan %TEMP%-kansioon.</String>
+  <String Id="HelpCloseButton">&amp;Sulje</String>
+  <String Id="InstallLicenseTerms">Hyväksy Microsoft .NET Framework -ohjelman &lt;a href="#"&gt;käyttöoikeusehdot&lt;/a&gt; valitsemalla Hyväksy ja asenna.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Hyväksy ja asenna</String>
+  <String Id="InstallDeclineButton">&amp;Hylkää</String>
+  <String Id="ProgressHeader">Asennuksen edistyminen</String>
+  <String Id="ProgressLabel">Käsitellään:</String>
+  <String Id="ProgressCancelButton">&amp;Peruuta</String>
+  <String Id="FailureHeader">Asennus epäonnistui</String>
+  <String Id="FailureLogLinkText">Asennus epäonnistui yhdestä tai useammasta syystä. Korjaa ongelmat ja yritä suorittaa asennus sitten uudelleen. Lisätietoja on &lt;a href="#"&gt;lokitiedostossa&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Tietokone täytyy käynnistää uudelleen ohjelmiston palautuksen viimeistelemiseksi.</String>
+  <String Id="FailureRestartButton">&amp;Käynnistä uudelleen</String>
+  <String Id="FailureCloseButton">&amp;Sulje</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1036/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1036/mbapreq.wxl
new file mode 100644
index 00000000..f67dfa8e
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1036/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="fr-fr" Language="1036" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Installation de [WixBundleName]</String>
+  <String Id="Title">Microsoft .NET Framework requis pour l'installation de [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Êtes-vous sûr de vouloir annuler ?</String>
+  <String Id="HelpHeader">Aide de l'installation</String>
+  <String Id="HelpText">/passive | /quiet -  affiche une interface minimale sans invites ou n'affiche
+   aucune interface ni aucune invite. Par défaut, l'interface et toutes les
+   invites sont affichées.
+
+/norestart   - annule toute tentative de redémarrage. Par défaut, l'interface
+   affiche une invite avant de redémarrer.
+/log journal.txt - consigne les entrées de journal dans un fichier spécifique.
+   Par défaut, un fichier journal est créé dans %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Fermer</String>
+  <String Id="InstallLicenseTerms">Cliquez sur le bouton « Accepter et installer » pour accepter les &lt;a href="#"&gt;termes du contrat de licence&lt;/a&gt; Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Accepter et installer</String>
+  <String Id="InstallDeclineButton">&amp;Refuser</String>
+  <String Id="ProgressHeader">Progression de l'installation</String>
+  <String Id="ProgressLabel">Traitement en cours :</String>
+  <String Id="ProgressCancelButton">&amp;Annuler</String>
+  <String Id="FailureHeader">L'installation a échoué</String>
+  <String Id="FailureLogLinkText">L'installation a échoué pour une ou plusieurs raisons. Corrigez les problèmes et recommencez l'installation. Pour plus d'informations, consultez le &lt;a href="#"&gt;fichier journal&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Vous devez redémarrer votre ordinateur pour effectuer la restauration du logiciel.</String>
+  <String Id="FailureRestartButton">&amp;Redémarrer</String>
+  <String Id="FailureCloseButton">&amp;Fermer</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1038/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1038/mbapreq.wxl
new file mode 100644
index 00000000..6a4b109d
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1038/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="hu-hu" Language="1038" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] telepítő</String>
+  <String Id="Title">A(z) [WixBundleName] telepítéséhez Microsoft .NET-keretrendszer szükséges</String>
+  <String Id="ConfirmCancelMessage">Biztosan megszakítja?</String>
+  <String Id="HelpHeader">A telepítő súgója</String>
+  <String Id="HelpText">/passive | /quiet -  Minimális felhasználói felület megjelenítése kérdések
+   nélkül, illetve felhasználói felület és kérdések megjelenítése nélküli
+   telepítés. Alapesetben a felhasználói felület és minden kérdés megjelenik.
+
+/norestart     - Az újraindítási kérések elrejtése. Alapesetben a felhasználói
+   felületen megjelennek az újraindítási kérések.
+/log naplo.txt - Naplózás a megadott fájlba. Alapesetben a naplófájl a %TEMP%
+   könyvtárban jön létre.</String>
+  <String Id="HelpCloseButton">&amp;Bezárás</String>
+  <String Id="InstallLicenseTerms">A Microsoft .NET-keretrendszer &lt;a href="#"&gt;licencszerződésének&lt;/a&gt; elfogadásához kattintson az „Elfogadás és telepítés” gombra.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Elfogadás és telepítés</String>
+  <String Id="InstallDeclineButton">&amp;Elutasítás</String>
+  <String Id="ProgressHeader">Telepítési folyamat</String>
+  <String Id="ProgressLabel">Feldolgozás:</String>
+  <String Id="ProgressCancelButton">&amp;Mégse</String>
+  <String Id="FailureHeader">A telepítés nem sikerült</String>
+  <String Id="FailureLogLinkText">Legalább egy olyan hiba lépett fel, amely a telepítés meghiúsulását okozta. Hárítsa el a hibákat, majd futtassa újra a telepítőt. További információt a &lt;a href="#"&gt;naplófájlban &lt;/a&gt; talál.</String>
+  <String Id="FailureRestartText">A szoftver visszaállításának befejezéséhez újra kell indítania a számítógépet.</String>
+  <String Id="FailureRestartButton">&amp;Újraindítás</String>
+  <String Id="FailureCloseButton">&amp;Bezárás</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1040/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1040/mbapreq.wxl
new file mode 100644
index 00000000..f57d58e5
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1040/mbapreq.wxl
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="it-it" Language="1040" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Installazione di [WixBundleName]</String>
+  <String Id="Title">Microsoft .NET Framework necessario per l'installazione di [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Annullare?</String>
+  <String Id="HelpHeader">Guida dell'installazione</String>
+  <String Id="HelpText">/passive | /quiet - visualizza l'interfaccia utente minima senza istruzioni
+   oppure non visualizza né l'interfaccia utente né le istruzioni. Per
+   impostazione predefinita vengono visualizzate interfaccia utente e
+   istruzioni.
+
+/norestart   - elimina eventuali tentativi di riavvio. Per impostazione
+   predefinita l'interfaccia utente chiede istruzioni prima del riavvio.
+/log log.txt - registra in un file specifico. Per impostazione predefinita un
+   file di log viene creato in %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Chiudi</String>
+  <String Id="InstallLicenseTerms">Fare clic sul pulsante "Accetta e installa" per accettare le &lt;a href="#"&gt;condizioni di licenza&lt;/a&gt; di Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Accetta e installa</String>
+  <String Id="InstallDeclineButton">&amp;Rifiuta</String>
+  <String Id="ProgressHeader">Stato installazione</String>
+  <String Id="ProgressLabel">Elaborazione in corso:</String>
+  <String Id="ProgressCancelButton">&amp;Annulla</String>
+  <String Id="FailureHeader">Installazione non riuscita</String>
+  <String Id="FailureLogLinkText">L'installazione non è riuscita a causa di uno o più problemi. Risolvere i problemi e provare di nuovo l'installazione. Per ulteriori informazioni vedere il &lt;a href="#"&gt;file di log&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">È necessario riavviare il computer per completare il rollback del software.</String>
+  <String Id="FailureRestartButton">&amp;Riavvia</String>
+  <String Id="FailureCloseButton">&amp;Chiudi</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1041/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1041/mbapreq.wxl
new file mode 100644
index 00000000..3fe7b9b3
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1041/mbapreq.wxl
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="ja-jp" Language="1041" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] セットアップ</String>
+  <String Id="Title">[WixBundleName] セットアップには Microsoft .NET Framework が必要です</String>
+  <String Id="ConfirmCancelMessage">取り消しますか?</String>
+  <String Id="HelpHeader">セットアップのヘルプ</String>
+  <String Id="HelpText">/passive | /quiet -  最小の UI だけを表示してプロンプトは表示しないか、UI
+   もプロンプトも表示しません。 既定では、UI とすべてのプロンプトが表示されます。
+
+/norestart   - 再起動の試みをすべて抑制します。既定では、再起動の前に UI によりプロンプトが表示されます。
+/log log.txt - 特定のファイルにログを記録します。既定では、%TEMP% にログ ファイルが作成されます。</String>
+  <String Id="HelpCloseButton">閉じる(&amp;C)</String>
+  <String Id="InstallLicenseTerms">Microsoft .NET Framework の&lt;a href="#"&gt;ライセンス条項&lt;/a&gt;に同意する場合は、［同意してインストール］5D; ボタンをクリックします。</String>
+  <String Id="InstallAcceptAndInstallButton">同意してインストール(&amp;A)</String>
+  <String Id="InstallDeclineButton">同意しない(&amp;)</String>
+  <String Id="ProgressHeader">セットアップの進行状況</String>
+  <String Id="ProgressLabel">処理中:</String>
+  <String Id="ProgressCancelButton">キャンセル(&amp;C)</String>
+  <String Id="FailureHeader">セットアップに失敗しました</String>
+  <String Id="FailureLogLinkText">1 つ以上の問題が原因でセットアップに失敗しました。問題を解決してからセットアップをやり直してください。詳細については、&lt;a href="#"&gt;ログ ファイル&lt;/a&gt;を参照してください。</String>
+  <String Id="FailureRestartText">ソフトウェアのロールバックを完了するには、コンピューターを再起動する必要があります。</String>
+  <String Id="FailureRestartButton">再起動(&amp;R)</String>
+  <String Id="FailureCloseButton">閉じる(&amp;C)</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1042/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1042/mbapreq.wxl
new file mode 100644
index 00000000..0f53dcc3
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1042/mbapreq.wxl
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="ko-kr" Language="1042" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] 설치</String>
+  <String Id="Title">[WixBundleName] 설치에 필요한 Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">취소하시겠습니까?</String>
+  <String Id="HelpHeader">설치 도움말</String>
+  <String Id="HelpText">/passive | /quiet -  메시지 없이 최소 UI를 표시하거나 UI와 메시지를 전혀
+   표시하지 않습니다. 기본적으로 UI 및 모든 메시지는 표시됩니다.
+
+/norestart   - 다시 시작하려는 시도를 무시합니다. 기본적으로 UI는 다시 시작하기 전에 메시지를 표시합니다.
+/log log.txt - 특정 파일에 기록합니다. 기본적으로 로그 파일이 %TEMP%에 생성됩니다.</String>
+  <String Id="HelpCloseButton">닫기(&amp;C)</String>
+  <String Id="InstallLicenseTerms">Microsoft .NET Framework &lt;a href="#"&gt;사용 조건&lt;/a&gt;에 동의하려면 "동의 및 설치"를 클릭하십시오.</String>
+  <String Id="InstallAcceptAndInstallButton">동의 및 설치(&amp;A)</String>
+  <String Id="InstallDeclineButton">동의 안 함(&amp;D)</String>
+  <String Id="ProgressHeader">설치 진행률</String>
+  <String Id="ProgressLabel">처리 중:</String>
+  <String Id="ProgressCancelButton">취소(&amp;C)</String>
+  <String Id="FailureHeader">설치 실패</String>
+  <String Id="FailureLogLinkText">하나 이상의 문제로 인해 설치에 실패했습니다. 문제를 수정하고 설치를 다시 시도하십시오. 자세한 내용은 &lt;a href="#"&gt;로그 파일&lt;/a&gt;을 참조하십시오.</String>
+  <String Id="FailureRestartText">소프트웨어의 롤백을 완료하려면 컴퓨터를 다시 시작해야 합니다.</String>
+  <String Id="FailureRestartButton">다시 시작(&amp;R)</String>
+  <String Id="FailureCloseButton">닫기(&amp;C)</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1043/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1043/mbapreq.wxl
new file mode 100644
index 00000000..f4a2c78c
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1043/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="nl-nl" Language="1043" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] Installatie</String>
+  <String Id="Title">Microsoft .NET Framework is vereist voor installatie [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Weet u zeker dat u de installatie wilt annuleren?</String>
+  <String Id="HelpHeader">Help bij Setup</String>
+  <String Id="HelpText">/passive | /quiet - geeft een minimale gebruikersinterface weer zonder prompts
+   of geeft geen gebruikersinterface en geen prompts weer. Gebruikersinterface
+   en alle prompts worden standaard weergegeven.
+
+/norestart   - pogingen tot opnieuw opstarten onderdrukken.
+   Gebruikersinterface vraagt standaard alvorens opnieuw op te starten.
+/log log.txt - registreert gegevens in een specifiek bestand. Een logbestand
+   wordt standaard in %TEMP% gemaakt.</String>
+  <String Id="HelpCloseButton">&amp;Sluiten</String>
+  <String Id="InstallLicenseTerms">Klik op de knop 'Accepteren en installeren' om de &lt;a href="#"&gt;licentievoorwaarden&lt;/a&gt; van het Microsoft .NET Framework te accepteren.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Accepteren en installeren</String>
+  <String Id="InstallDeclineButton">&amp;Weigeren</String>
+  <String Id="ProgressHeader">Voortgang van de installatie</String>
+  <String Id="ProgressLabel">Verwerken:</String>
+  <String Id="ProgressCancelButton">&amp;Annuleren</String>
+  <String Id="FailureHeader">Installatie mislukt</String>
+  <String Id="FailureLogLinkText">Er zijn een of meer fouten opgetreden waardoor de installatie is mislukt. Corrigeer de problemen en voer Setup opnieuw uit. Raadpleeg het &lt;a href="#"&gt;log boekbestand&lt;/a&gt; voor meer informatie.</String>
+  <String Id="FailureRestartText">U moet uw computer opnieuw opstarten om het terugdraaien van de software te voltooien.</String>
+  <String Id="FailureRestartButton">&amp;Opnieuw opstarten</String>
+  <String Id="FailureCloseButton">&amp;Sluiten</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1044/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1044/mbapreq.wxl
new file mode 100644
index 00000000..da5c8283
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1044/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="nb-no" Language="1044" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] Installasjonsprogram</String>
+  <String Id="Title">Microsoft .NET Framework kreves for [WixBundleName]-installasjon</String>
+  <String Id="ConfirmCancelMessage">Er du sikker på at du vil avbryte?</String>
+  <String Id="HelpHeader">Installasjonshjelp</String>
+  <String Id="HelpText">/passive | /quiet -  viser minimalt brukergrensesnitt uten ledetekster, eller
+   ikke noe brukergrensesnitt og ingen ledetekster. Som standard vises
+   brukergrensesnitt og alle ledetekster.
+
+/norestart   - undertrykker alle forsøk på omstart. Som standard spør
+   brukergrensesnittet før omstart.
+/log log.txt - skriver logg til en bestemt fil. Som standard opprettes en
+   loggfil i %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Lukk</String>
+  <String Id="InstallLicenseTerms">Klikk Godta og installer for å godta&lt;a href="#"&gt;lisensvilkårene&lt;/a&gt; for Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Godta og installer</String>
+  <String Id="InstallDeclineButton">&amp;Avslå</String>
+  <String Id="ProgressHeader">Fremdrift for installasjon</String>
+  <String Id="ProgressLabel">Behandler:</String>
+  <String Id="ProgressCancelButton">&amp;Avbryt</String>
+  <String Id="FailureHeader">Installasjon mislyktes</String>
+  <String Id="FailureLogLinkText">Ett eller flere problemer var årsak til at installasjonen mislyktes. Løs problemene, og installer på nytt. Du finner flere opplysninger i &lt;a href="#"&gt;loggfilen&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Du må starte datamaskinen på nytt for å fullføre tilbakerullingen av programvaren.</String>
+  <String Id="FailureRestartButton">&amp;Start på nytt</String>
+  <String Id="FailureCloseButton">&amp;Lukk</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1045/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1045/mbapreq.wxl
new file mode 100644
index 00000000..7aca87c2
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1045/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="pl-pl" Language="1045" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Instalator programu [WixBundleName]</String>
+  <String Id="Title">Do zainstalowania programu [WixBundleName] jest wymagany program Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">Czy na pewno chcesz anulować?</String>
+  <String Id="HelpHeader">Pomoc instalatora</String>
+  <String Id="HelpText">/passive | /quiet -  wyświetla minimalny interfejs użytkownika bez monitów
+   lub nie wyświetla interfejsu użytkownika ani monitów. Domyślnie jest
+   wyświetlany interfejs  użytkownika i wszystkie monity.
+
+/norestart   - pomija wszelkie próby ponownego uruchomienia. Domyślnie
+   interfejs użytkownika będzie wyświetlał monit przed ponownym uruchomieniem.
+/log log.txt - zapisuje wpisy dziennika do określonego pliku.
+   Domyślnie plik dziennika jest tworzony w folderze %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Zamknij</String>
+  <String Id="InstallLicenseTerms">Kliknij przycisk Zaakceptuj i zainstaluj, aby zaakceptować &lt;a href="#"&gt;warunki licencji&lt;/a&gt; programu Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Zaakceptuj i zainstaluj</String>
+  <String Id="InstallDeclineButton">&amp;Odrzuć</String>
+  <String Id="ProgressHeader">Postęp instalacji</String>
+  <String Id="ProgressLabel">Trwa przetwarzanie:</String>
+  <String Id="ProgressCancelButton">&amp;Anuluj</String>
+  <String Id="FailureHeader">Instalacja nie powiodła się</String>
+  <String Id="FailureLogLinkText">Co najmniej jeden problem spowodował niepowodzenie instalacji. Usuń problemy, a następnie ponów próbę instalacji. Aby uzyskać więcej informacji można znaleźć w &lt;a href="#"&gt;pliku dziennika&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Aby zakończyć wycofywanie oprogramowania, musisz ponownie uruchomić komputer.</String>
+  <String Id="FailureRestartButton">&amp;Uruchom ponownie</String>
+  <String Id="FailureCloseButton">&amp;Zamknij</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1046/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1046/mbapreq.wxl
new file mode 100644
index 00000000..be185502
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1046/mbapreq.wxl
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="pt-br" Language="1046" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] Instalação</String>
+  <String Id="Title">Microsoft .NET Framework é necessário para instalação do [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Tem certeza de que deseja cancelar?</String>
+  <String Id="HelpHeader">Ajuda da Instalação</String>
+  <String Id="HelpText">/passive | /quiet -  exibe UI mínima sem avisos ou exibe sem UI e
+   sem avisos. Por padrão a UI e todos avisos são exibidos.
+
+/norestart   - suprime qualquer tentativa de reinicialização. Por padrão a UI
+   irá solicitar antes de reiniciar.
+/log log.txt - logs para um arquivo específico. Por padrão um arquivo de log é
+   criado em %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Fechar</String>
+  <String Id="InstallLicenseTerms">Clique o botão "Aceitar e Instalar" para aceitar os termos de licença do Microsoft .NET Framework &lt;a href="#"&gt;&lt;/a&gt;.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Aceitar e Instalar</String>
+  <String Id="InstallDeclineButton">&amp;Recusar</String>
+  <String Id="ProgressHeader">Progresso da Instalação</String>
+  <String Id="ProgressLabel">Processando:</String>
+  <String Id="ProgressCancelButton">&amp;Cancelar</String>
+  <String Id="FailureHeader">Falha na Instalação</String>
+  <String Id="FailureLogLinkText">Um ou mais problemas causaram falha na instalação. Corrija os problemas e tente a instalação novamente. Para mais informações consulte o &lt;a href="#"&gt;arquivo de log&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Você deve reiniciar o computador para completar a reversão do software. </String>
+  <String Id="FailureRestartButton">&amp;Reiniciar</String>
+  <String Id="FailureCloseButton">&amp;Fechar</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1049/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1049/mbapreq.wxl
new file mode 100644
index 00000000..a1aec7ed
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1049/mbapreq.wxl
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="ru-ru" Language="1049" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Установка [WixBundleName]</String>
+  <String Id="Title">Для установки [WixBundleName] требуется Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">Вы действительно хотите отменить операцию?</String>
+  <String Id="HelpHeader">Справка по установке</String>
+  <String Id="HelpText">/passive | /quiet - отображение минимального ИП без запросов или работа без ИП 
+   и беззапросов. По умолчанию отображаются ИП и все запросы.
+
+/norestart   - отключение всех попыток перезагрузки. По умолчанию в ИП перед
+   перезагрузкой отображается запрос.
+/log log.txt - запись журнала в указанный файл. По умолчанию файл журнала
+   создается в папке %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Закрыть</String>
+  <String Id="InstallLicenseTerms">Нажмите кнопку "Принять и установить", чтобы принять &lt;a href="#"&gt;условия лицензии&lt;/a&gt; Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Принять и установить</String>
+  <String Id="InstallDeclineButton">&amp;Отклонить</String>
+  <String Id="ProgressHeader">Выполнение установки</String>
+  <String Id="ProgressLabel">Обработка:</String>
+  <String Id="ProgressCancelButton">&amp;Отмена</String>
+  <String Id="FailureHeader">Сбой установки</String>
+  <String Id="FailureLogLinkText">Не удалось выполнить установку из-за одной или нескольких проблем. Устраните эти проблемы, а затем снова запустите программу установки. Дополнительные сведения см. в &lt;a href="#"&gt;файле журнала&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Необходимо перезагрузить компьютер, чтобы завершить откат программного обеспечения.</String>
+  <String Id="FailureRestartButton">&amp;Перезагрузить</String>
+  <String Id="FailureCloseButton">&amp;Закрыть</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1051/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1051/mbapreq.wxl
new file mode 100644
index 00000000..9f0b4711
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1051/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="sk-sk" Language="1051" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] – inštalácia</String>
+  <String Id="Title">Na inštaláciu aplikácie [WixBundleName] sa vyžaduje súčasť Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">Naozaj chcete zrušiť operáciu?</String>
+  <String Id="HelpHeader">Pomocník pre inštaláciu</String>
+  <String Id="HelpText">/passive | /quiet – zobrazí minimálne používateľské rozhranie bez výziev alebo
+   nezobrazí žiadne používateľské rozhranie ani výzvy. Predvolene sa
+   zobrazuje používateľské rozhranie aj všetky výzvy.
+
+/norestart   – zruší všetky pokusy o reštart. Používateľské rozhranie
+   predvolene zobrazí pred reštartom výzvu.
+/log log.txt – urobí záznam do určeného súboru. Súbor denníka sa predvolene
+   vytvorí v priečinku %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Zavrieť</String>
+  <String Id="InstallLicenseTerms">Kliknutím na tlačidlo Súhlasiť a inštalovať vyjadrite svoj súhlas s &lt;a href="#"&gt;licenčnými podmienkami&lt;/a&gt; súčasti Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Súhlasiť a inštalovať</String>
+  <String Id="InstallDeclineButton">&amp;Odmietnuť</String>
+  <String Id="ProgressHeader">Priebeh inštalácie</String>
+  <String Id="ProgressLabel">Spracúva sa:</String>
+  <String Id="ProgressCancelButton">&amp;Zrušiť</String>
+  <String Id="FailureHeader">Inštalácia zlyhala</String>
+  <String Id="FailureLogLinkText">Inštalácia zlyhala pre jednu alebo viac príčin. Odstráňte problémy a skúste znova spustiť inštaláciu. Ďalšie informácie nájdete v &lt;a href="#"&gt;súbore denníka&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Dokončenie všetkých zmien softvéru vyžaduje reštart počítača.</String>
+  <String Id="FailureRestartButton">&amp;Reštartovať</String>
+  <String Id="FailureCloseButton">&amp;Zavrieť</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1053/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1053/mbapreq.wxl
new file mode 100644
index 00000000..72961409
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1053/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="sv-se" Language="1053" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName]-installation</String>
+  <String Id="Title">Microsoft .NET Framework krävs för installation av [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Vill du avbryta?</String>
+  <String Id="HelpHeader">Installationshjälp</String>
+  <String Id="HelpText">/passive | /quiet -  visar ett minimalt användargränssnitt utan prompter,
+   alternativt inget användargränssnitt och inga prompter. Som standard visas
+   användargränssnitt och samtliga prompter.
+
+/norestart   - hejdar omstart. Som standard visar användargränssnittet en
+   prompt före omstart.
+/log log.txt - skapar logg till en specifik fil. Som standard skapas loggfilen
+   i %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Stäng</String>
+  <String Id="InstallLicenseTerms">Klicka på knappen "Godkänn och installera" för att godkänna &lt;a href="#"&gt;licensvillkoren&lt;/a&gt; för Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Godkänn och installera</String>
+  <String Id="InstallDeclineButton">&amp;Avbryt</String>
+  <String Id="ProgressHeader">Installationsförlopp</String>
+  <String Id="ProgressLabel">Bearbetar:</String>
+  <String Id="ProgressCancelButton">&amp;Avbryt</String>
+  <String Id="FailureHeader">Installationen misslyckades</String>
+  <String Id="FailureLogLinkText">Installationen misslyckades på grund av ett eller flera problem. Åtgärda problemen och försök igen. Se &lt;a href="#"&gt;loggfilen&lt;/a&gt; för mer information.</String>
+  <String Id="FailureRestartText">Starta om datorn för att återställa programmet.</String>
+  <String Id="FailureRestartButton">&amp;Starta om</String>
+  <String Id="FailureCloseButton">&amp;Stäng</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1055/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1055/mbapreq.wxl
new file mode 100644
index 00000000..ee52da98
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1055/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="tr-tr" Language="1055" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] Kurulumu</String>
+  <String Id="Title">[WixBundleName] kurulumu için Microsoft .NET Framework gerekir</String>
+  <String Id="ConfirmCancelMessage">İptal etmek istediğinizden emin misiniz?</String>
+  <String Id="HelpHeader">Kurulum Yardımı</String>
+  <String Id="HelpText">/passive | /quiet -  komut istemi olmayan olabildiğince küçük bir UI
+   görüntüler veya komut istemi ve UI görüntülemez. Varsayılan olarak UI
+   ve tüm komut istemleri görüntülenir.
+
+/norestart   - yeniden başlatma denemelerini engeller. Varsayılan
+   olarak UI yeniden başlatmadan önce komut isteyecektir.
+/log log.txt - belirli bir dosyayı günlük dosyası olarak kullanır.
+   Varsayılan olarak %TEMP% konumunda bir günlük dosyası oluşturulur.</String>
+  <String Id="HelpCloseButton">&amp;Kapat</String>
+  <String Id="InstallLicenseTerms">Microsoft .NET Framework &lt;a href="#"&gt;lisans şartlarını&lt;/a&gt; kabul etmek için "Kabul Et ve Yükle" düğmesini tıklatın.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Kabul Et ve Yükle</String>
+  <String Id="InstallDeclineButton">&amp;Reddet</String>
+  <String Id="ProgressHeader">Kurulum İlerleme Durumu</String>
+  <String Id="ProgressLabel">İşleniyor:</String>
+  <String Id="ProgressCancelButton">&amp;İptal</String>
+  <String Id="FailureHeader">Kurulum Başarısız</String>
+  <String Id="FailureLogLinkText">Bir veya daha fazla sorun kurulumun başarısız olmasına neden oldu. Lütfen sorunları çözün ve kurulumu yeniden deneyin. Daha fazla bilgi için &lt;a href="#"&gt;günlük dosyasına&lt;/a&gt; bakın.</String>
+  <String Id="FailureRestartText">Yazılım geri alma işlemini tamamlamak için bilgisayarınızı yeniden başlatmanız gerekir.</String>
+  <String Id="FailureRestartButton">&amp;Yeniden Başlat</String>
+  <String Id="FailureCloseButton">&amp;Kapat</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/1060/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/1060/mbapreq.wxl
new file mode 100644
index 00000000..f3b4bfe5
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/1060/mbapreq.wxl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="sl-si" Language="1060" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] Namestitev</String>
+  <String Id="Title">Microsoft .NET Framework, potreben za namestitev paketa [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Ali ste prepričani, da želite preklicati?</String>
+  <String Id="HelpHeader">Pomoč za namestitev</String>
+  <String Id="HelpText">/passive | /quiet - prikaže minimalni uporabniški vmesnik brez pozivov ali ne prikaže
+   uporabniškega vmesnika in pozivov. Privzeto so prikazani uporabniški vmesnik in
+   vsi pozivi.
+
+/norestart - skrije vse možnosti za vnovicni zagon. Privzeto uporabniški vmesnik
+   prikaže poziv pred ponovnim zagonom.
+/log log.txt - beleži vnose v dnevnik v doloceno datoteko. Privzeto je datoteko
+   ustvarjena v mapi %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Zapri</String>
+  <String Id="InstallLicenseTerms">Kliknite »Sprejmi in namesti« in sprejmite &lt;a href="#"&gt;licenčne pogoje&lt;/a&gt; za Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Sprejmi in namesti</String>
+  <String Id="InstallDeclineButton">&amp;Zavrni</String>
+  <String Id="ProgressHeader">Potek namestitve</String>
+  <String Id="ProgressLabel">Obdelovanje:</String>
+  <String Id="ProgressCancelButton">&amp;Prekliči</String>
+  <String Id="FailureHeader">Namestitev ni uspela</String>
+  <String Id="FailureLogLinkText">Namestitev ni uspela zaradi ene ali več težav. Odpravite težave in ponovno zaženite namestitev. Za več informacij glejte &lt;a href="#"&gt;dnevniško datoteko&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Za povrnitev prejšnjega stanja programske opreme morate ponovno zagnati računalnik.</String>
+  <String Id="FailureRestartButton">&amp;Ponovni zagon</String>
+  <String Id="FailureCloseButton">&amp;Zapri</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/2052/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/2052/mbapreq.wxl
new file mode 100644
index 00000000..63cdb418
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/2052/mbapreq.wxl
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="zh-ch" Language="2052" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">[WixBundleName] 安装</String>
+  <String Id="Title">[WixBundleName] 安装需要 Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">是否确实要取消?</String>
+  <String Id="HelpHeader">安装程序帮助</String>
+  <String Id="HelpText">/passive | /quiet -  显示最小的 UI 且无提示，或者不显示 UI 且
+   无提示。默认情况下显示 UI 和所有提示。
+
+/norestart   - 隐藏任何重启提示。默认情况下 UI 会在重启前提示。
+/log log.txt - 记录到特定文件。默认情况下在 %TEMP% 中创建日志文件。</String>
+  <String Id="HelpCloseButton">关闭(&amp;C)</String>
+  <String Id="InstallLicenseTerms">单击“接受并安装”按钮以接受 Microsoft .NET Framework &lt;a href="#"&gt;许可证条款&lt;/a&gt;。</String>
+  <String Id="InstallAcceptAndInstallButton">接受并安装(&amp;A)</String>
+  <String Id="InstallDeclineButton">拒绝(&amp;D)</String>
+  <String Id="ProgressHeader">安装进度</String>
+  <String Id="ProgressLabel">正在处理:</String>
+  <String Id="ProgressCancelButton">取消(&amp;C)</String>
+  <String Id="FailureHeader">安装失败</String>
+  <String Id="FailureLogLinkText">一个或多个问题导致安装失败。请解决问题，然后重新尝试安装。有关详情，请查看&lt;a href="#"&gt;日志文件&lt;/a&gt;。</String>
+  <String Id="FailureRestartText">必须重启计算机才能完成软件的回滚。</String>
+  <String Id="FailureRestartButton">重启(&amp;R)</String>
+  <String Id="FailureCloseButton">关闭(&amp;C)</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/2070/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/2070/mbapreq.wxl
new file mode 100644
index 00000000..6a49ca31
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/2070/mbapreq.wxl
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="pt-pt" Language="2070" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Configuração do [WixBundleName]</String>
+  <String Id="Title">O Microsoft .NET Framework é necessário para a configuração do [WixBundleName]</String>
+  <String Id="ConfirmCancelMessage">Tem a certeza de que pretende cancelar?</String>
+  <String Id="HelpHeader">Ajuda da Configuração</String>
+  <String Id="HelpText">/passive | /quiet -  apresenta IU mínima sem mensagens ou não apresenta IU nem
+   mensagens. Por predefinição, são apresentadas a IU e todas as mensagens.
+
+/norestart   - suprimir qualquer tentativa de reinício. Por predefinição, a IU
+   avisará antes de reiniciar.
+/log log.txt - regista num ficheiro específico. Por predefinição, é criado um
+   ficheiro de registo em %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Fechar</String>
+  <String Id="InstallLicenseTerms">Clique no botão "Aceitar e Instalar" para aceitar os &lt;a href="#"&gt;termos de licenciamento&lt;/a&gt; do Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Aceitar e Instalar</String>
+  <String Id="InstallDeclineButton">&amp;Recusar</String>
+  <String Id="ProgressHeader">Progresso da Configuração</String>
+  <String Id="ProgressLabel">A processar:</String>
+  <String Id="ProgressCancelButton">&amp;Cancelar</String>
+  <String Id="FailureHeader">Falha da Configuração</String>
+  <String Id="FailureLogLinkText">Um ou mais problemas provocaram a falha da configuração. Corrija os problemas e repita a configuração. Para mais informações, consulte o &lt;a href="#"&gt;ficheiro de registo&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Tem de reiniciar o computador para concluir a reversão do software.</String>
+  <String Id="FailureRestartButton">&amp;Reiniciar</String>
+  <String Id="FailureCloseButton">&amp;Fechar</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/3082/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/3082/mbapreq.wxl
new file mode 100644
index 00000000..0290624c
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/3082/mbapreq.wxl
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="es-es" Language="3082" xmlns="http://schemas.microsoft.com/wix/2006/localization">
+  <String Id="Caption">Instalación de [WixBundleName]</String>
+  <String Id="Title">La instalación de [WixBundleName] requiere Microsoft .NET Framework</String>
+  <String Id="ConfirmCancelMessage">¿Está seguro de que desea cancelar?</String>
+  <String Id="HelpHeader">Ayuda del programa de instalación</String>
+  <String Id="HelpText">/passive | /quiet -  muestra una interfaz de usuario mínima y no realiza
+   preguntas, o bien no muestra interfaz de usuario y no realiza preguntas.
+   De manera  predeterminada se muestra la interfaz de usuario completa y se
+   realizan todas las  preguntas necesarias.
+
+/norestart   - suprime cualquier intento de reinicio. De manera predeterminada,
+   la interfaz de usuario preguntará si se desea reiniciar.
+/log log.txt - registra los datos de instalación en un archivo específico.
+   De manera predeterminada se crea un archivo de registro en %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Cerrar</String>
+  <String Id="InstallLicenseTerms">Haga clic en el botón "Aceptar e instalar" para aceptar los &lt;a href="#"&gt;términos de licencia&lt;/a&gt; de Microsoft .NET Framework.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Aceptar e instalar</String>
+  <String Id="InstallDeclineButton">&amp;Rechazar</String>
+  <String Id="ProgressHeader">Progreso de la instalación</String>
+  <String Id="ProgressLabel">Procesando:</String>
+  <String Id="ProgressCancelButton">&amp;Cancelar</String>
+  <String Id="FailureHeader">Error de la instalación</String>
+  <String Id="FailureLogLinkText">No se pudo completar la instalación a causa de uno o varios problemas. Corrija los problemas y vuelva a intentar la instalación. Para más información, vea el &lt;a href="#"&gt;archivo de registro&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">Debe reiniciar el equipo para completar la reversión del software.</String>
+  <String Id="FailureRestartButton">&amp;Reiniciar</String>
+  <String Id="FailureCloseButton">&amp;Cerrar</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/HyperlinkLargeTheme.xml b/src/ext/Bal/wixstdba/Resources/HyperlinkLargeTheme.xml
new file mode 100644
index 00000000..39a38ee0
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/HyperlinkLargeTheme.xml
@@ -0,0 +1,109 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="500" Height="390" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="64" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="112" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.InstallHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="-129" FontId="3" DisablePrefix="yes">#(loc.InstallMessage)</Label>
+            <Hypertext Name="EulaHyperlink" X="11" Y="-107" Width="-11" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallLicenseLinkText)</Hypertext>
+            <Label Name="InstallVersion" X="11" Y="-73" Width="246" Height="17" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBAShowVersion">#(loc.InstallVersion)</Label>
+            <Checkbox Name="EulaAcceptCheckbox" X="-11" Y="-41" Width="260" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallAcceptCheckbox)</Checkbox>
+            <Button Name="OptionsButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" VisibleCondition="NOT WixStdBASuppressOptionsUI">
+                <Text>#(loc.InstallOptionsButton)</Text>
+                <ChangePageAction Page="Options" />
+            </Button>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.InstallInstallButton)</Button>
+            <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Options">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.OptionsHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OptionsLocationLabel)</Label>
+            <Editbox Name="InstallFolder" X="11" Y="143" Width="-91" Height="21" TabStop="yes" FontId="3" FileSystemAutoComplete="yes" />
+            <Button Name="BrowseButton" X="-11" Y="142" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsBrowseButton)</Text>
+                <BrowseDirectoryAction VariableName="InstallFolder" />
+            </Button>
+            <Button Name="OptionsOkButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsOkButton)</Text>
+                <ChangePageAction Page="Install" />
+            </Button>
+            <Button Name="OptionsCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsCancelButton)</Text>
+                <ChangePageAction Page="Install" Cancel="yes" />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="121" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OverallProgressPackageText)</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="143" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Modify">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ModifyHeader)</Label>
+            <Button Name="RepairButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.ModifyRepairButton)</Button>
+            <Button Name="UninstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ModifyUninstallButton)</Button>
+            <Button Name="ModifyCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.ModifyCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Success">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.SuccessHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.SuccessLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.SuccessInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.SuccessRepairHeader)</Text>
+            </Label>
+            <Button Name="LaunchButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessLaunchButton)</Button>
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">
+                <Text>#(loc.SuccessRestartText)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallRestartText)</Text>
+            </Label>
+            <Button Name="SuccessRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessRestartButton)</Button>
+            <Button Name="SuccessCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.SuccessCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.FailureHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.FailureLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.FailureUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.FailureInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.FailureRepairHeader)</Text>
+            </Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="121" Width="-11" Height="42" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureHyperlinkLogText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="163" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes" />
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/HyperlinkSidebarTheme.xml b/src/ext/Bal/wixstdba/Resources/HyperlinkSidebarTheme.xml
new file mode 100644
index 00000000..1dff9d7e
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/HyperlinkSidebarTheme.xml
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="600" Height="450" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <Page Name="Help">
+            <Label X="80" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png"/>
+            <Label X="11" Y="80" Width="-11" Height="32" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Label X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="165" Height="400" ImageFile="logoside.png"/>
+            <Label X="185" Y="50" Width="-11" Height="32" FontId="2" DisablePrefix="yes">#(loc.InstallHeader)</Label>
+            <Label X="185" Y="91" Width="-11" Height="64" FontId="3" DisablePrefix="yes">#(loc.InstallMessage)</Label>
+            <Hypertext Name="EulaHyperlink" X="185" Y="-111" Width="-11" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallLicenseLinkText)</Hypertext>
+            <Label Name="InstallVersion" X="185" Y="-81" Width="-11" Height="17" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBAShowVersion">#(loc.InstallVersion)</Label>
+            <Checkbox Name="EulaAcceptCheckbox" X="185" Y="-51" Width="-11" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallAcceptCheckbox)</Checkbox>
+            <Button Name="OptionsButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" VisibleCondition="NOT WixStdBASuppressOptionsUI">
+                <Text>#(loc.InstallOptionsButton)</Text>
+                <ChangePageAction Page="Options" />
+            </Button>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.InstallInstallButton)</Button>
+            <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Options">
+            <Label X="80" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png"/>
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.OptionsHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="17" FontId="3">#(loc.OptionsLocationLabel)</Label>
+            <Editbox Name="InstallFolder" X="11" Y="143" Width="-91" Height="21" TabStop="yes" FontId="3" FileSystemAutoComplete="yes" />
+            <Button Name="BrowseButton" X="-11" Y="142" Width="75" Height="23" TabStop="yes" FontId="3">
+                <Text>#(loc.OptionsBrowseButton)</Text>
+                <BrowseDirectoryAction VariableName="InstallFolder" />
+            </Button>
+            <Button Name="OptionsOkButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsOkButton)</Text>
+                <ChangePageAction Page="Install" />
+            </Button>
+            <Button Name="OptionsCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsCancelButton)</Text>
+                <ChangePageAction Page="Install" Cancel="yes" />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="80" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png"/>
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="141" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="141" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OverallProgressPackageText)</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="163" Width="-11" Height="20" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Modify">
+            <Label X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="165" Height="400" ImageFile="logoside.png"/>
+            <Label X="185" Y="50" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ModifyHeader)</Label>
+            <Button Name="RepairButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.ModifyRepairButton)</Button>
+            <Button Name="UninstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ModifyUninstallButton)</Button>
+            <Button Name="ModifyCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.ModifyCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Success">
+            <Label X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="165" Height="400" ImageFile="logoside.png"/>
+            <Label X="185" Y="50" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.SuccessHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.SuccessLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.SuccessInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.SuccessRepairHeader)</Text>
+            </Label>
+            <Button Name="LaunchButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessLaunchButton)</Button>
+            <Label X="185" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">
+                <Text>#(loc.SuccessRestartText)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallRestartText)</Text>
+            </Label>
+            <Button Name="SuccessRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessRestartButton)</Button>
+            <Button Name="SuccessCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.SuccessCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="185" Y="11" Width="-11" Height="32" FontId="1" DisablePrefix="yes">#(loc.Title)</Label>
+            <ImageControl X="11" Y="11" Width="165" Height="400" ImageFile="logoside.png"/>
+            <Label X="185" Y="50" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.FailureHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.FailureLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.FailureUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.FailureInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.FailureRepairHeader)</Text>
+            </Label>
+            <Hypertext Name="FailureLogFileLink" X="185" Y="121" Width="-11" Height="68" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureHyperlinkLogText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="185" Y="-115" Width="-11" Height="80" FontId="3" TabStop="yes" HideWhenDisabled="yes" />
+            <Label X="185" Y="-57" Width="-11" Height="80" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.wxl b/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.wxl
new file mode 100644
index 00000000..e6e3f8ab
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.wxl
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="en-us" Language="1033" xmlns="http://wixtoolset.org/schemas/v4/wxl">
+  <String Id="Caption">[WixBundleName] Setup</String>
+  <String Id="Title">[WixBundleName]</String>
+  <String Id="InstallHeader">Welcome</String>
+  <String Id="InstallMessage">Setup will install [WixBundleName] on your computer. Click install to continue, options to set the install directory or Close to exit.</String>
+  <String Id="InstallVersion">Version [WixBundleVersion]</String>
+  <String Id="ConfirmCancelMessage">Are you sure you want to cancel?</String>
+  <String Id="ExecuteUpgradeRelatedBundleMessage">Previous version</String>
+  <String Id="HelpHeader">Setup Help</String>
+  <String Id="HelpText">/install | /repair | /uninstall | /layout [directory] - installs, repairs, uninstalls or
+   creates a complete local copy of the bundle in directory. Install is the default.
+
+/passive | /quiet -  displays minimal UI with no prompts or displays no UI and
+   no prompts. By default UI and all prompts are displayed.
+
+/norestart   - suppress any attempts to restart. By default UI will prompt before restart.
+/log log.txt - logs to a specific file. By default a log file is created in %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Close</String>
+  <String Id="InstallLicenseLinkText">[WixBundleName] &lt;a href="#"&gt;license terms&lt;/a&gt;.</String>
+  <String Id="InstallAcceptCheckbox">I &amp;agree to the license terms and conditions</String>
+  <String Id="InstallOptionsButton">&amp;Options</String>
+  <String Id="InstallInstallButton">&amp;Install</String>
+  <String Id="InstallCancelButton">&amp;Cancel</String>
+  <String Id="OptionsHeader">Setup Options</String>
+  <String Id="OptionsLocationLabel">Install location:</String>
+  <String Id="OptionsBrowseButton">&amp;Browse</String>
+  <String Id="OptionsOkButton">&amp;OK</String>
+  <String Id="OptionsCancelButton">&amp;Cancel</String>
+  <String Id="ProgressHeader">Setup Progress</String>
+  <String Id="ProgressLabel">Processing:</String>
+  <String Id="OverallProgressPackageText">Initializing...</String>
+  <String Id="ProgressCancelButton">&amp;Cancel</String>
+  <String Id="ModifyHeader">Modify Setup</String>
+  <String Id="ModifyRepairButton">&amp;Repair</String>
+  <String Id="ModifyUninstallButton">&amp;Uninstall</String>
+  <String Id="ModifyCancelButton">&amp;Cancel</String>
+  <String Id="SuccessHeader">Setup Successful</String>
+  <String Id="SuccessInstallHeader">Installation Successfully Completed</String>
+  <String Id="SuccessLayoutHeader">Layout Successfully Completed</String>
+  <String Id="SuccessRepairHeader">Repair Successfully Completed</String>
+  <String Id="SuccessUninstallHeader">Uninstall Successfully Completed</String>
+  <String Id="SuccessLaunchButton">&amp;Launch</String>
+  <String Id="SuccessRestartText">You must restart your computer before you can use the software.</String>
+  <String Id="SuccessUninstallRestartText">You must restart your computer to complete the removal of the software.</String>
+  <String Id="SuccessRestartButton">&amp;Restart</String>
+  <String Id="SuccessCloseButton">&amp;Close</String>
+  <String Id="FailureHeader">Setup Failed</String>
+  <String Id="FailureInstallHeader">Setup Failed</String>
+  <String Id="FailureLayoutHeader">Layout Failed</String>
+  <String Id="FailureRepairHeader">Repair Failed</String>
+  <String Id="FailureUninstallHeader">Uninstall Failed</String>
+  <String Id="FailureHyperlinkLogText">One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the &lt;a href="#"&gt;log file&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">You must restart your computer to complete the rollback of the software.</String>
+  <String Id="FailureRestartButton">&amp;Restart</String>
+  <String Id="FailureCloseButton">&amp;Close</String>
+  <String Id="ErrorFailNoActionReboot">No action was taken as a system reboot is required.</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.xml b/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.xml
new file mode 100644
index 00000000..657db34b
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/HyperlinkTheme.xml
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="485" Height="300" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="64" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="112" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Hypertext Name="EulaHyperlink" X="11" Y="121" Width="-11" Height="51" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallLicenseLinkText)</Hypertext>
+            <Checkbox Name="EulaAcceptCheckbox" X="-11" Y="-41" Width="260" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallAcceptCheckbox)</Checkbox>
+            <Button Name="OptionsButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" VisibleCondition="NOT WixStdBASuppressOptionsUI">
+                <Text>#(loc.InstallOptionsButton)</Text>
+                <ChangePageAction Page="Options" />
+            </Button>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.InstallInstallButton)</Button>
+            <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Options">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.OptionsHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OptionsLocationLabel)</Label>
+            <Editbox Name="InstallFolder" X="11" Y="143" Width="-91" Height="21" TabStop="yes" FontId="3" FileSystemAutoComplete="yes" />
+            <Button Name="BrowseButton" X="-11" Y="142" Width="75" Height="23" TabStop="yes" FontId="3">
+                <Text>#(loc.OptionsBrowseButton)</Text>
+                <BrowseDirectoryAction VariableName="InstallFolder" />
+            </Button>
+            <Button Name="OptionsOkButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsOkButton)</Text>
+                <ChangePageAction Page="Install" />
+            </Button>
+            <Button Name="OptionsCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsCancelButton)</Text>
+                <ChangePageAction Page="Install" Cancel="yes" />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="121" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OverallProgressPackageText)</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="143" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Modify">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ModifyHeader)</Label>
+            <Button Name="RepairButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.ModifyRepairButton)</Button>
+            <Button Name="UninstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ModifyUninstallButton)</Button>
+            <Button Name="ModifyCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.ModifyCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Success">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.SuccessHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.SuccessLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.SuccessInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.SuccessRepairHeader)</Text>
+            </Label>
+            <Button Name="LaunchButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessLaunchButton)</Button>
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">
+                <Text>#(loc.SuccessRestartText)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallRestartText)</Text>
+            </Label>
+            <Button Name="SuccessRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessRestartButton)</Button>
+            <Button Name="SuccessCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.SuccessCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.FailureHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.FailureLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.FailureUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.FailureInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.FailureRepairHeader)</Text>
+            </Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="121" Width="-11" Height="42" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureHyperlinkLogText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="163" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes" />
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/LoremIpsumLicense.rtf b/src/ext/Bal/wixstdba/Resources/LoremIpsumLicense.rtf
new file mode 100644
index 00000000..1a183236
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/LoremIpsumLicense.rtf
diff --git a/src/ext/Bal/wixstdba/Resources/RtfLargeTheme.xml b/src/ext/Bal/wixstdba/Resources/RtfLargeTheme.xml
new file mode 100644
index 00000000..3571e13a
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/RtfLargeTheme.xml
@@ -0,0 +1,108 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="500" Height="390" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="64" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="112" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Label X="11" Y="80" Width="-11" Height="-70" TabStop="no" FontId="2" HexStyle="800000" DisablePrefix="yes" />
+            <Richedit Name="EulaRichedit" X="12" Y="81" Width="-12" Height="-71" TabStop="yes" FontId="0" />
+            <Label Name="InstallVersion" X="11" Y="-41" Width="210" Height="17" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBAShowVersion">#(loc.InstallVersion)</Label>
+            <Checkbox Name="EulaAcceptCheckbox" X="-11" Y="-41" Width="260" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallAcceptCheckbox)</Checkbox>
+            <Button Name="OptionsButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" VisibleCondition="NOT WixStdBASuppressOptionsUI">
+                <Text>#(loc.InstallOptionsButton)</Text>
+                <ChangePageAction Page="Options" />
+            </Button>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.InstallInstallButton)</Button>
+            <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Options">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.OptionsHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OptionsLocationLabel)</Label>
+            <Editbox Name="InstallFolder" X="11" Y="143" Width="-91" Height="21" TabStop="yes" FontId="3" FileSystemAutoComplete="yes" />
+            <Button Name="BrowseButton" X="-11" Y="142" Width="75" Height="23" TabStop="yes" FontId="3">
+                <Text>#(loc.OptionsBrowseButton)</Text>
+                <BrowseDirectoryAction VariableName="InstallFolder" />
+            </Button>
+            <Button Name="OptionsOkButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsOkButton)</Text>
+                <ChangePageAction Page="Install" />
+            </Button>
+            <Button Name="OptionsCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsCancelButton)</Text>
+                <ChangePageAction Page="Install" Cancel="yes" />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="121" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OverallProgressPackageText)</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="143" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Modify">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ModifyHeader)</Label>
+            <Button Name="RepairButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.ModifyRepairButton)</Button>
+            <Button Name="UninstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ModifyUninstallButton)</Button>
+            <Button Name="ModifyCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.ModifyCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Success">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.SuccessHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.SuccessLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.SuccessInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.SuccessRepairHeader)</Text>
+            </Label>
+            <Button Name="LaunchButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessLaunchButton)</Button>
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">
+                <Text>#(loc.SuccessRestartText)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallRestartText)</Text>
+            </Label>
+            <Button Name="SuccessRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessRestartButton)</Button>
+            <Button Name="SuccessCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.SuccessCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.FailureHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.FailureLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.FailureUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.FailureInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.FailureRepairHeader)</Text>
+            </Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="121" Width="-11" Height="42" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureHyperlinkLogText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="163" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes" />
+            <Label Name="FailureRestartText" X="-11" Y="-51" Width="400" Height="34" FontId="3" HideWhenDisabled="yes" DisablePrefix="yes">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>        
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/RtfTheme.wxl b/src/ext/Bal/wixstdba/Resources/RtfTheme.wxl
new file mode 100644
index 00000000..f73fb994
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/RtfTheme.wxl
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="en-us" Language="1033" xmlns="http://wixtoolset.org/schemas/v4/wxl">
+  <String Id="Caption">[WixBundleName] Setup</String>
+  <String Id="Title">[WixBundleName]</String>
+  <String Id="InstallVersion">Version [WixBundleVersion]</String>
+  <String Id="ConfirmCancelMessage">Are you sure you want to cancel?</String>
+  <String Id="ExecuteUpgradeRelatedBundleMessage">Previous version</String>
+  <String Id="HelpHeader">Setup Help</String>
+  <String Id="HelpText">/install | /repair | /uninstall | /layout [directory] - installs, repairs, uninstalls or
+   creates a complete local copy of the bundle in directory. Install is the default.
+
+/passive | /quiet -  displays minimal UI with no prompts or displays no UI and
+   no prompts. By default UI and all prompts are displayed.
+
+/norestart   - suppress any attempts to restart. By default UI will prompt before restart.
+/log log.txt - logs to a specific file. By default a log file is created in %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Close</String>
+  <String Id="InstallAcceptCheckbox">I &amp;agree to the license terms and conditions</String>
+  <String Id="InstallOptionsButton">&amp;Options</String>
+  <String Id="InstallInstallButton">&amp;Install</String>
+  <String Id="InstallCancelButton">&amp;Cancel</String>
+  <String Id="OptionsHeader">Setup Options</String>
+  <String Id="OptionsLocationLabel">Install location:</String>
+  <String Id="OptionsBrowseButton">&amp;Browse</String>
+  <String Id="OptionsOkButton">&amp;OK</String>
+  <String Id="OptionsCancelButton">&amp;Cancel</String>
+  <String Id="ProgressHeader">Setup Progress</String>
+  <String Id="ProgressLabel">Processing:</String>
+  <String Id="OverallProgressPackageText">Initializing...</String>
+  <String Id="ProgressCancelButton">&amp;Cancel</String>
+  <String Id="ModifyHeader">Modify Setup</String>
+  <String Id="ModifyRepairButton">&amp;Repair</String>
+  <String Id="ModifyUninstallButton">&amp;Uninstall</String>
+  <String Id="ModifyCancelButton">&amp;Cancel</String>
+  <String Id="SuccessHeader">Setup Successful</String>
+  <String Id="SuccessInstallHeader">Installation Successfully Completed</String>
+  <String Id="SuccessLayoutHeader">Layout Successfully Completed</String>
+  <String Id="SuccessRepairHeader">Repair Successfully Completed</String>
+  <String Id="SuccessUninstallHeader">Uninstall Successfully Completed</String>
+  <String Id="SuccessLaunchButton">&amp;Launch</String>
+  <String Id="SuccessRestartText">You must restart your computer before you can use the software.</String>
+  <String Id="SuccessUninstallRestartText">You must restart your computer to complete the removal of the software.</String>
+  <String Id="SuccessRestartButton">&amp;Restart</String>
+  <String Id="SuccessCloseButton">&amp;Close</String>
+  <String Id="FailureHeader">Setup Failed</String>
+  <String Id="FailureInstallHeader">Setup Failed</String>
+  <String Id="FailureLayoutHeader">Layout Failed</String>
+  <String Id="FailureRepairHeader">Repair Failed</String>
+  <String Id="FailureUninstallHeader">Uninstall Failed</String>
+  <String Id="FailureHyperlinkLogText">One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the &lt;a href="#"&gt;log file&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">You must restart your computer to complete the rollback of the software.</String>
+  <String Id="FailureRestartButton">&amp;Restart</String>
+  <String Id="FailureCloseButton">&amp;Close</String>
+  <String Id="ErrorFailNoActionReboot">No action was taken as a system reboot is required.</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/RtfTheme.xml b/src/ext/Bal/wixstdba/Resources/RtfTheme.xml
new file mode 100644
index 00000000..d6535bac
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/RtfTheme.xml
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="485" Height="300" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="logo.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="64" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="112" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Richedit Name="EulaRichedit" X="11" Y="80" Width="-11" Height="-70" TabStop="yes" FontId="0" HexStyle="800000" />
+            <Checkbox Name="EulaAcceptCheckbox" X="-11" Y="-41" Width="260" Height="17" TabStop="yes" FontId="3" HideWhenDisabled="yes">#(loc.InstallAcceptCheckbox)</Checkbox>
+            <Button Name="OptionsButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" VisibleCondition="NOT WixStdBASuppressOptionsUI">
+                <Text>#(loc.InstallOptionsButton)</Text>
+                <ChangePageAction Page="Options" />
+            </Button>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.InstallInstallButton)</Button>
+            <Button Name="InstallCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Options">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.OptionsHeader)</Label>
+            <Label X="11" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OptionsLocationLabel)</Label>
+            <Editbox Name="InstallFolder" X="11" Y="143" Width="-91" Height="21" TabStop="yes" FontId="3" FileSystemAutoComplete="yes" />
+            <Button Name="BrowseButton" X="-11" Y="142" Width="75" Height="23" TabStop="yes" FontId="3">
+                <Text>#(loc.OptionsBrowseButton)</Text>
+                <BrowseDirectoryAction VariableName="InstallFolder" />
+            </Button>
+            <Button Name="OptionsOkButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsOkButton)</Text>
+                <ChangePageAction Page="Install" />
+            </Button>
+            <Button Name="OptionsCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.OptionsCancelButton)</Text>
+                <ChangePageAction Page="Install" Cancel="yes" />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="121" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="121" Width="-11" Height="17" FontId="3" DisablePrefix="yes">#(loc.OverallProgressPackageText)</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="143" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Modify">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ModifyHeader)</Label>
+            <Button Name="RepairButton" X="-171" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.ModifyRepairButton)</Button>
+            <Button Name="UninstallButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ModifyUninstallButton)</Button>
+            <Button Name="ModifyCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.ModifyCancelButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Success">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.SuccessHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.SuccessLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.SuccessInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.SuccessRepairHeader)</Text>
+            </Label>
+            <Button Name="LaunchButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessLaunchButton)</Button>
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">
+                <Text>#(loc.SuccessRestartText)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.SuccessUninstallRestartText)</Text>
+            </Label>
+            <Button Name="SuccessRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.SuccessRestartButton)</Button>
+            <Button Name="SuccessCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.SuccessCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="80" Width="-11" Height="30" FontId="2" DisablePrefix="yes">
+                <Text>#(loc.FailureHeader)</Text>
+                <Text Condition="WixBundleAction = 2">#(loc.FailureLayoutHeader)</Text>
+                <Text Condition="WixBundleAction = 3">#(loc.FailureUninstallHeader)</Text>
+                <Text Condition="WixBundleAction = 5">#(loc.FailureInstallHeader)</Text>
+                <Text Condition="WixBundleAction = 7">#(loc.FailureRepairHeader)</Text>
+            </Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="121" Width="-11" Height="42" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureHyperlinkLogText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="163" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes" />
+            <Label X="-11" Y="-51" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>        
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/dncpreq.thm b/src/ext/Bal/wixstdba/Resources/dncpreq.thm
new file mode 100644
index 00000000..4ae61819
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/dncpreq.thm
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="485" Height="300" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="mbapreq.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="96" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="153" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Hypertext Name="EulaHyperlink" X="11" Y="121" Width="-11" Height="34" TabStop="yes" FontId="3">#(loc.InstallLicenseTerms)</Hypertext>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="130" Height="23" TabStop="yes" FontId="0">#(loc.InstallAcceptAndInstallButton)</Button>
+            <Button Name="InstallDeclineButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallDeclineButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="153" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="153" Width="-11" Height="17" FontId="3" DisablePrefix="yes">[ProgressPackageName]</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="175" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.FailureHeader)</Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="153" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureLogLinkText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="190" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes"/>
+            <Label X="-11" Y="-20" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/dncpreq.wxl b/src/ext/Bal/wixstdba/Resources/dncpreq.wxl
new file mode 100644
index 00000000..d6b73b5f
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/dncpreq.wxl
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="en-us" Language="1033" xmlns="http://wixtoolset.org/schemas/v4/wxl">
+  <String Id="Caption">[WixBundleName] Setup</String>
+  <String Id="Title">Microsoft .NET Core required for [WixBundleName] setup</String>
+  <String Id="ConfirmCancelMessage">Are you sure you want to cancel?</String>
+  <String Id="HelpHeader">Setup Help</String>
+  <String Id="HelpText">/passive | /quiet -  displays minimal UI with no prompts or displays no UI and
+   no prompts. By default UI and all prompts are displayed.
+
+/norestart   - suppress any attempts to restart. By default UI will prompt before restart.
+/log log.txt - logs to a specific file. By default a log file is created in %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Close</String>
+  <String Id="InstallLicenseTerms">Click the "Accept and Install" button to accept the Microsoft .NET Core &lt;a href="#"&gt;license terms&lt;/a&gt;.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Accept and Install</String>
+  <String Id="InstallDeclineButton">&amp;Decline</String>
+  <String Id="ProgressHeader">Setup Progress</String>
+  <String Id="ProgressLabel">Processing:</String>
+  <String Id="ProgressCancelButton">&amp;Cancel</String>
+  <String Id="FailureHeader">Setup Failed</String>
+  <String Id="FailureLogLinkText">One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the &lt;a href="#"&gt;log file&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">You must restart your computer to complete the rollback of the software.</String>
+  <String Id="FailureRestartButton">&amp;Restart</String>
+  <String Id="FailureCloseButton">&amp;Close</String>
+  <String Id="SCDRUNTIMEFAILUREErrorMessage">[WixBundleName] cannot run on this machine. Install the latest updates and/or the latest OS to run in a supported environment.</String>
+  <String Id="ErrorFailNoActionReboot">No action was taken as a system reboot is required.</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/Resources/logo.png b/src/ext/Bal/wixstdba/Resources/logo.png
new file mode 100644
index 00000000..7adc6e11
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/logo.png
diff --git a/src/ext/Bal/wixstdba/Resources/logoSide.png b/src/ext/Bal/wixstdba/Resources/logoSide.png
new file mode 100644
index 00000000..308841c5
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/logoSide.png
diff --git a/src/ext/Bal/wixstdba/Resources/mbapreq.png b/src/ext/Bal/wixstdba/Resources/mbapreq.png
new file mode 100644
index 00000000..c6e9527b
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/mbapreq.png
diff --git a/src/ext/Bal/wixstdba/Resources/mbapreq.thm b/src/ext/Bal/wixstdba/Resources/mbapreq.thm
new file mode 100644
index 00000000..4ae61819
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/mbapreq.thm
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Theme xmlns="http://wixtoolset.org/schemas/v4/thmutil">
+    <Font Id="0" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+    <Font Id="1" Height="-24" Weight="500" Foreground="windowtext">Segoe UI</Font>
+    <Font Id="2" Height="-22" Weight="500" Foreground="graytext">Segoe UI</Font>
+    <Font Id="3" Height="-12" Weight="500" Foreground="windowtext" Background="window">Segoe UI</Font>
+
+    <Window Width="485" Height="300" HexStyle="100a0000" FontId="0" Caption="#(loc.Caption)">
+        <ImageControl X="11" Y="11" Width="64" Height="64" ImageFile="mbapreq.png" Visible="yes"/>
+        <Label X="80" Y="11" Width="-11" Height="96" FontId="1" Visible="yes" DisablePrefix="yes">#(loc.Title)</Label>
+
+        <Page Name="Help">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.HelpHeader)</Label>
+            <Label X="11" Y="153" Width="-11" Height="-35" FontId="3" DisablePrefix="yes">#(loc.HelpText)</Label>
+            <Button Name="HelpCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.HelpCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Install">
+            <Hypertext Name="EulaHyperlink" X="11" Y="121" Width="-11" Height="34" TabStop="yes" FontId="3">#(loc.InstallLicenseTerms)</Hypertext>
+            <Button Name="InstallButton" X="-91" Y="-11" Width="130" Height="23" TabStop="yes" FontId="0">#(loc.InstallAcceptAndInstallButton)</Button>
+            <Button Name="InstallDeclineButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.InstallDeclineButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+        <Page Name="Progress">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.ProgressHeader)</Label>
+            <Label X="11" Y="153" Width="70" Height="17" FontId="3" DisablePrefix="yes">#(loc.ProgressLabel)</Label>
+            <Label Name="OverallProgressPackageText" X="85" Y="153" Width="-11" Height="17" FontId="3" DisablePrefix="yes">[ProgressPackageName]</Label>
+            <Progressbar Name="OverallCalculatedProgressbar" X="11" Y="175" Width="-11" Height="15" />
+            <Button Name="ProgressCancelButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">#(loc.ProgressCancelButton)</Button>
+        </Page>
+        <Page Name="Failure">
+            <Label X="11" Y="112" Width="-11" Height="30" FontId="2" DisablePrefix="yes">#(loc.FailureHeader)</Label>
+            <Hypertext Name="FailureLogFileLink" X="11" Y="153" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes">#(loc.FailureLogLinkText)</Hypertext>
+            <Hypertext Name="FailureMessageText" X="22" Y="190" Width="-11" Height="51" FontId="3" TabStop="yes" HideWhenDisabled="yes"/>
+            <Label X="-11" Y="-20" Width="400" Height="34" FontId="3" DisablePrefix="yes" VisibleCondition="WixStdBARestartRequired">#(loc.FailureRestartText)</Label>
+            <Button Name="FailureRestartButton" X="-91" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0" HideWhenDisabled="yes">#(loc.FailureRestartButton)</Button>
+            <Button Name="FailureCloseButton" X="-11" Y="-11" Width="75" Height="23" TabStop="yes" FontId="0">
+                <Text>#(loc.FailureCloseButton)</Text>
+                <CloseWindowAction />
+            </Button>
+        </Page>
+    </Window>
+</Theme>
diff --git a/src/ext/Bal/wixstdba/Resources/mbapreq.wxl b/src/ext/Bal/wixstdba/Resources/mbapreq.wxl
new file mode 100644
index 00000000..95e3a6ae
--- /dev/null
+++ b/src/ext/Bal/wixstdba/Resources/mbapreq.wxl
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+
+<WixLocalization Culture="en-us" Language="1033" xmlns="http://wixtoolset.org/schemas/v4/wxl">
+  <String Id="Caption">[WixBundleName] Setup</String>
+  <String Id="Title">Microsoft .NET Framework required for [WixBundleName] setup</String>
+  <String Id="ConfirmCancelMessage">Are you sure you want to cancel?</String>
+  <String Id="HelpHeader">Setup Help</String>
+  <String Id="HelpText">/passive | /quiet -  displays minimal UI with no prompts or displays no UI and
+   no prompts. By default UI and all prompts are displayed.
+
+/norestart   - suppress any attempts to restart. By default UI will prompt before restart.
+/log log.txt - logs to a specific file. By default a log file is created in %TEMP%.</String>
+  <String Id="HelpCloseButton">&amp;Close</String>
+  <String Id="InstallLicenseTerms">Click the "Accept and Install" button to accept the Microsoft .NET Framework &lt;a href="#"&gt;license terms&lt;/a&gt;.</String>
+  <String Id="InstallAcceptAndInstallButton">&amp;Accept and Install</String>
+  <String Id="InstallDeclineButton">&amp;Decline</String>
+  <String Id="ProgressHeader">Setup Progress</String>
+  <String Id="ProgressLabel">Processing:</String>
+  <String Id="ProgressCancelButton">&amp;Cancel</String>
+  <String Id="FailureHeader">Setup Failed</String>
+  <String Id="FailureLogLinkText">One or more issues caused the setup to fail. Please fix the issues and then retry setup. For more information see the &lt;a href="#"&gt;log file&lt;/a&gt;.</String>
+  <String Id="FailureRestartText">You must restart your computer to complete the rollback of the software.</String>
+  <String Id="FailureRestartButton">&amp;Restart</String>
+  <String Id="FailureCloseButton">&amp;Close</String>
+  <String Id="NET452WIN7RTMErrorMessage">[WixBundleName] cannot run on Windows 7 RTM with .NET 4.5.2 installed. Install Windows 7 SP1 to run in a supported environment.</String>
+  <String Id="ErrorFailNoActionReboot">No action was taken as a system reboot is required.</String>
+</WixLocalization>
diff --git a/src/ext/Bal/wixstdba/WixStandardBootstrapperApplication.cpp b/src/ext/Bal/wixstdba/WixStandardBootstrapperApplication.cpp
new file mode 100644
index 00000000..d4bf7b43
--- /dev/null
+++ b/src/ext/Bal/wixstdba/WixStandardBootstrapperApplication.cpp
@@ -0,0 +1,4264 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+#include "BalBaseBootstrapperApplicationProc.h"
+#include "BalBaseBootstrapperApplication.h"
+
+static const LPCWSTR WIXBUNDLE_VARIABLE_ELEVATED = L"WixBundleElevated";
+
+static const LPCWSTR WIXSTDBA_WINDOW_CLASS = L"WixStdBA";
+
+static const LPCWSTR WIXSTDBA_VARIABLE_INSTALL_FOLDER = L"InstallFolder";
+static const LPCWSTR WIXSTDBA_VARIABLE_LAUNCH_TARGET_PATH = L"LaunchTarget";
+static const LPCWSTR WIXSTDBA_VARIABLE_LAUNCH_TARGET_ELEVATED_ID = L"LaunchTargetElevatedId";
+static const LPCWSTR WIXSTDBA_VARIABLE_LAUNCH_ARGUMENTS = L"LaunchArguments";
+static const LPCWSTR WIXSTDBA_VARIABLE_LAUNCH_HIDDEN = L"LaunchHidden";
+static const LPCWSTR WIXSTDBA_VARIABLE_LAUNCH_WORK_FOLDER = L"LaunchWorkingFolder";
+
+static const DWORD WIXSTDBA_ACQUIRE_PERCENTAGE = 30;
+
+static const LPCWSTR WIXSTDBA_VARIABLE_BUNDLE_FILE_VERSION = L"WixBundleFileVersion";
+static const LPCWSTR WIXSTDBA_VARIABLE_LANGUAGE_ID = L"WixStdBALanguageId";
+static const LPCWSTR WIXSTDBA_VARIABLE_RESTART_REQUIRED = L"WixStdBARestartRequired";
+static const LPCWSTR WIXSTDBA_VARIABLE_SHOW_VERSION = L"WixStdBAShowVersion";
+static const LPCWSTR WIXSTDBA_VARIABLE_SUPPRESS_OPTIONS_UI = L"WixStdBASuppressOptionsUI";
+
+enum WIXSTDBA_STATE
+{
+    WIXSTDBA_STATE_INITIALIZING,
+    WIXSTDBA_STATE_INITIALIZED,
+    WIXSTDBA_STATE_HELP,
+    WIXSTDBA_STATE_DETECTING,
+    WIXSTDBA_STATE_DETECTED,
+    WIXSTDBA_STATE_PLANNING,
+    WIXSTDBA_STATE_PLANNED,
+    WIXSTDBA_STATE_APPLYING,
+    WIXSTDBA_STATE_CACHING,
+    WIXSTDBA_STATE_CACHED,
+    WIXSTDBA_STATE_EXECUTING,
+    WIXSTDBA_STATE_EXECUTED,
+    WIXSTDBA_STATE_APPLIED,
+    WIXSTDBA_STATE_FAILED,
+};
+
+enum WM_WIXSTDBA
+{
+    WM_WIXSTDBA_SHOW_HELP = WM_APP + 100,
+    WM_WIXSTDBA_DETECT_PACKAGES,
+    WM_WIXSTDBA_PLAN_PACKAGES,
+    WM_WIXSTDBA_APPLY_PACKAGES,
+    WM_WIXSTDBA_CHANGE_STATE,
+    WM_WIXSTDBA_SHOW_FAILURE,
+};
+
+// This enum must be kept in the same order as the vrgwzPageNames array.
+enum WIXSTDBA_PAGE
+{
+    WIXSTDBA_PAGE_LOADING,
+    WIXSTDBA_PAGE_HELP,
+    WIXSTDBA_PAGE_INSTALL,
+    WIXSTDBA_PAGE_MODIFY,
+    WIXSTDBA_PAGE_PROGRESS,
+    WIXSTDBA_PAGE_PROGRESS_PASSIVE,
+    WIXSTDBA_PAGE_SUCCESS,
+    WIXSTDBA_PAGE_FAILURE,
+    COUNT_WIXSTDBA_PAGE,
+};
+
+// This array must be kept in the same order as the WIXSTDBA_PAGE enum.
+static LPCWSTR vrgwzPageNames[] = {
+    L"Loading",
+    L"Help",
+    L"Install",
+    L"Modify",
+    L"Progress",
+    L"ProgressPassive",
+    L"Success",
+    L"Failure",
+};
+
+enum WIXSTDBA_CONTROL
+{
+    // Welcome page
+    WIXSTDBA_CONTROL_INSTALL_BUTTON = THEME_FIRST_ASSIGN_CONTROL_ID,
+    WIXSTDBA_CONTROL_EULA_RICHEDIT,
+    WIXSTDBA_CONTROL_EULA_LINK,
+    WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX,
+
+    // Modify page
+    WIXSTDBA_CONTROL_REPAIR_BUTTON,
+    WIXSTDBA_CONTROL_UNINSTALL_BUTTON,
+
+    // Progress page
+    WIXSTDBA_CONTROL_CACHE_PROGRESS_PACKAGE_TEXT,
+    WIXSTDBA_CONTROL_CACHE_PROGRESS_BAR,
+    WIXSTDBA_CONTROL_CACHE_PROGRESS_TEXT,
+
+    WIXSTDBA_CONTROL_EXECUTE_PROGRESS_PACKAGE_TEXT,
+    WIXSTDBA_CONTROL_EXECUTE_PROGRESS_BAR,
+    WIXSTDBA_CONTROL_EXECUTE_PROGRESS_TEXT,
+    WIXSTDBA_CONTROL_EXECUTE_PROGRESS_ACTIONDATA_TEXT,
+
+    WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT,
+    WIXSTDBA_CONTROL_OVERALL_PROGRESS_BAR,
+    WIXSTDBA_CONTROL_OVERALL_CALCULATED_PROGRESS_BAR,
+    WIXSTDBA_CONTROL_OVERALL_PROGRESS_TEXT,
+
+    WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON,
+
+    // Success page
+    WIXSTDBA_CONTROL_LAUNCH_BUTTON,
+    WIXSTDBA_CONTROL_SUCCESS_RESTART_BUTTON,
+
+    // Failure page
+    WIXSTDBA_CONTROL_FAILURE_LOGFILE_LINK,
+    WIXSTDBA_CONTROL_FAILURE_MESSAGE_TEXT,
+    WIXSTDBA_CONTROL_FAILURE_RESTART_BUTTON,
+};
+
+static THEME_ASSIGN_CONTROL_ID vrgInitControls[] = {
+    { WIXSTDBA_CONTROL_INSTALL_BUTTON, L"InstallButton" },
+    { WIXSTDBA_CONTROL_EULA_RICHEDIT, L"EulaRichedit" },
+    { WIXSTDBA_CONTROL_EULA_LINK, L"EulaHyperlink" },
+    { WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX, L"EulaAcceptCheckbox" },
+
+    { WIXSTDBA_CONTROL_REPAIR_BUTTON, L"RepairButton" },
+    { WIXSTDBA_CONTROL_UNINSTALL_BUTTON, L"UninstallButton" },
+
+    { WIXSTDBA_CONTROL_CACHE_PROGRESS_PACKAGE_TEXT, L"CacheProgressPackageText" },
+    { WIXSTDBA_CONTROL_CACHE_PROGRESS_BAR, L"CacheProgressbar" },
+    { WIXSTDBA_CONTROL_CACHE_PROGRESS_TEXT, L"CacheProgressText" },
+    { WIXSTDBA_CONTROL_EXECUTE_PROGRESS_PACKAGE_TEXT, L"ExecuteProgressPackageText" },
+    { WIXSTDBA_CONTROL_EXECUTE_PROGRESS_BAR, L"ExecuteProgressbar" },
+    { WIXSTDBA_CONTROL_EXECUTE_PROGRESS_TEXT, L"ExecuteProgressText" },
+    { WIXSTDBA_CONTROL_EXECUTE_PROGRESS_ACTIONDATA_TEXT, L"ExecuteProgressActionDataText"},
+    { WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, L"OverallProgressPackageText" },
+    { WIXSTDBA_CONTROL_OVERALL_PROGRESS_BAR, L"OverallProgressbar" },
+    { WIXSTDBA_CONTROL_OVERALL_CALCULATED_PROGRESS_BAR, L"OverallCalculatedProgressbar" },
+    { WIXSTDBA_CONTROL_OVERALL_PROGRESS_TEXT, L"OverallProgressText" },
+    { WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON, L"ProgressCancelButton" },
+
+    { WIXSTDBA_CONTROL_LAUNCH_BUTTON, L"LaunchButton" },
+    { WIXSTDBA_CONTROL_SUCCESS_RESTART_BUTTON, L"SuccessRestartButton" },
+
+    { WIXSTDBA_CONTROL_FAILURE_LOGFILE_LINK, L"FailureLogFileLink" },
+    { WIXSTDBA_CONTROL_FAILURE_MESSAGE_TEXT, L"FailureMessageText" },
+    { WIXSTDBA_CONTROL_FAILURE_RESTART_BUTTON, L"FailureRestartButton" },
+};
+
+typedef struct _WIXSTDBA_PACKAGE_INFO
+{
+    LPWSTR sczPackageId;
+    BOOL fWasAlreadyInstalled;
+    BOOL fPlannedToBeInstalled;
+    BOOL fSuccessfullyInstalled;
+} WIXSTDBA_PACKAGE_INFO;
+
+
+static HRESULT DAPI EvaluateVariableConditionCallback(
+    __in_z LPCWSTR wzCondition,
+    __out BOOL* pf,
+    __in_opt LPVOID pvContext
+    );
+static HRESULT DAPI FormatVariableStringCallback(
+    __in_z LPCWSTR wzFormat,
+    __inout LPWSTR* psczOut,
+    __in_opt LPVOID pvContext
+    );
+static HRESULT DAPI GetVariableNumericCallback(
+    __in_z LPCWSTR wzVariable,
+    __out LONGLONG* pllValue,
+    __in_opt LPVOID pvContext
+    );
+static HRESULT DAPI SetVariableNumericCallback(
+    __in_z LPCWSTR wzVariable,
+    __in LONGLONG llValue,
+    __in_opt LPVOID pvContext
+    );
+static HRESULT DAPI GetVariableStringCallback(
+    __in_z LPCWSTR wzVariable,
+    __inout LPWSTR* psczValue,
+    __in_opt LPVOID pvContext
+    );
+static HRESULT DAPI SetVariableStringCallback(
+    __in_z LPCWSTR wzVariable,
+    __in_z_opt LPCWSTR wzValue,
+    __in BOOL fFormatted,
+    __in_opt LPVOID pvContext
+    );
+static LPCSTR LoggingRequestStateToString(
+    __in BOOTSTRAPPER_REQUEST_STATE requestState
+    );
+static LPCSTR LoggingMsiFeatureStateToString(
+    __in BOOTSTRAPPER_FEATURE_STATE featureState
+    );
+
+
+class CWixStandardBootstrapperApplication : public CBalBaseBootstrapperApplication
+{
+public: // IBootstrapperApplication
+    virtual STDMETHODIMP OnStartup()
+    {
+        HRESULT hr = S_OK;
+        DWORD dwUIThreadId = 0;
+
+        // create UI thread
+        m_hUiThread = ::CreateThread(NULL, 0, UiThreadProc, this, 0, &dwUIThreadId);
+        if (!m_hUiThread)
+        {
+            ExitWithLastError(hr, "Failed to create UI thread.");
+        }
+
+    LExit:
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnShutdown(
+        __inout BOOTSTRAPPER_SHUTDOWN_ACTION* pAction
+        )
+    {
+        HRESULT hr = S_OK;
+
+        // wait for UI thread to terminate
+        if (m_hUiThread)
+        {
+            ::WaitForSingleObject(m_hUiThread, INFINITE);
+            ReleaseHandle(m_hUiThread);
+        }
+
+        // If a restart was required.
+        if (m_fRestartRequired)
+        {
+            if (m_fAllowRestart)
+            {
+                *pAction = BOOTSTRAPPER_SHUTDOWN_ACTION_RESTART;
+            }
+
+            if (m_fPrereq)
+            {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, m_fAllowRestart ? "The prerequisites scheduled a restart. The bootstrapper application will be reloaded after the computer is restarted."
+                                                                        : "A restart is required by the prerequisites but the user delayed it. The bootstrapper application will be reloaded after the computer is restarted.");
+            }
+        }
+        else if (m_fPrereqInstalled)
+        {
+            BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "The prerequisites were successfully installed. The bootstrapper application will be reloaded.");
+            *pAction = BOOTSTRAPPER_SHUTDOWN_ACTION_RELOAD_BOOTSTRAPPER;
+        }
+        else if (m_fPrereqAlreadyInstalled)
+        {
+            BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "The prerequisites were already installed. The bootstrapper application will not be reloaded to prevent an infinite loop.");
+        }
+        else if (m_fPrereq)
+        {
+            BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "The prerequisites were not successfully installed, error: 0x%x. The bootstrapper application will be not reloaded.", m_hrFinal);
+        }
+
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnDetectRelatedBundle(
+        __in LPCWSTR wzBundleId,
+        __in BOOTSTRAPPER_RELATION_TYPE relationType,
+        __in LPCWSTR wzBundleTag,
+        __in BOOL fPerMachine,
+        __in LPCWSTR wzVersion,
+        __in BOOTSTRAPPER_RELATED_OPERATION operation,
+        __in BOOL fMissingFromCache,
+        __inout BOOL* pfCancel
+        )
+    {
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        if (!fMissingFromCache)
+        {
+            if (SUCCEEDED(BalInfoAddRelatedBundleAsPackage(&m_Bundle.packages, wzBundleId, relationType, fPerMachine, &pPackage)))
+            {
+                InitializePackageInfoForPackage(pPackage);
+            }
+
+            // If we're not doing a prerequisite install, remember when our bundle would cause a downgrade.
+            if (!m_fPrereq && BOOTSTRAPPER_RELATED_OPERATION_DOWNGRADE == operation)
+            {
+                m_fDowngrading = TRUE;
+            }
+        }
+
+        return CBalBaseBootstrapperApplication::OnDetectRelatedBundle(wzBundleId, relationType, wzBundleTag, fPerMachine, wzVersion, operation, fMissingFromCache, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnDetectPackageComplete(
+        __in LPCWSTR wzPackageId,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE state
+        )
+    {
+        WIXSTDBA_PACKAGE_INFO* pPackageInfo = NULL;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        if (BOOTSTRAPPER_PACKAGE_STATE_PRESENT == state &&
+            SUCCEEDED(GetPackageInfo(wzPackageId, &pPackageInfo, &pPackage)) &&
+            pPackageInfo)
+        {
+            // If the package is already installed, remember that.
+            pPackageInfo->fWasAlreadyInstalled = TRUE;
+        }
+
+        return S_OK;
+    }
+
+
+    virtual STDMETHODIMP OnDetectComplete(
+        __in HRESULT hrStatus,
+        __in BOOL /*fEligibleForCleanup*/
+        )
+    {
+        HRESULT hr = S_OK;
+        // If we're not interacting with the user or we're doing a layout or we're resuming just after a force restart
+        // then automatically start planning.
+        BOOL fSkipToPlan = SUCCEEDED(hrStatus) &&
+                           (BOOTSTRAPPER_DISPLAY_FULL > m_command.display ||
+                            BOOTSTRAPPER_ACTION_LAYOUT == m_command.action ||
+                            BOOTSTRAPPER_RESUME_TYPE_REBOOT == m_command.resumeType);
+        // If we're requiring user input (which currently means Install, Repair, or Uninstall)
+        // or if we're skipping to an action that modifies machine state
+        // then evaluate conditions.
+        BOOL fEvaluateConditions = SUCCEEDED(hrStatus) &&
+            (!fSkipToPlan || BOOTSTRAPPER_ACTION_LAYOUT < m_command.action && BOOTSTRAPPER_ACTION_UPDATE_REPLACE > m_command.action);
+
+        if (fEvaluateConditions)
+        {
+            hrStatus = EvaluateConditions();
+        }
+
+        if (FAILED(hrStatus))
+        {
+            fSkipToPlan = FALSE;
+        }
+        else
+        {
+            if (m_fPrereq)
+            {
+                m_fPrereqAlreadyInstalled = TRUE;
+
+                // At this point we have to assume that all prerequisite packages need to be installed, so set to false if any of them aren't installed.
+                for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+                {
+                    BAL_INFO_PACKAGE* pPackage = &m_Bundle.packages.rgPackages[i];
+                    WIXSTDBA_PACKAGE_INFO* pPackageInfo = reinterpret_cast<WIXSTDBA_PACKAGE_INFO*>(pPackage->pvCustomData);
+                    if (pPackage->fPrereqPackage && pPackageInfo && !pPackageInfo->fWasAlreadyInstalled)
+                    {
+                        m_fPrereqAlreadyInstalled = FALSE;
+                        break;
+                    }
+                }
+            }
+        }
+
+        SetState(WIXSTDBA_STATE_DETECTED, hrStatus);
+
+        if (fSkipToPlan)
+        {
+            ::PostMessageW(m_hWnd, WM_WIXSTDBA_PLAN_PACKAGES, 0, m_command.action);
+        }
+
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnPlanRelatedBundle(
+        __in_z LPCWSTR wzBundleId,
+        __in BOOTSTRAPPER_REQUEST_STATE recommendedState,
+        __inout_z BOOTSTRAPPER_REQUEST_STATE* pRequestedState,
+        __inout BOOL* pfCancel
+        )
+    {
+        // If we're only installing prerequisites, do not touch related bundles.
+        if (m_fPrereq)
+        {
+            *pRequestedState = BOOTSTRAPPER_REQUEST_STATE_NONE;
+        }
+
+        return CBalBaseBootstrapperApplication::OnPlanRelatedBundle(wzBundleId, recommendedState, pRequestedState, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnPlanPackageBegin(
+        __in_z LPCWSTR wzPackageId,
+        __in BOOTSTRAPPER_PACKAGE_STATE state,
+        __in BOOL fCached,
+        __in BOOTSTRAPPER_PACKAGE_CONDITION_RESULT installCondition,
+        __in BOOTSTRAPPER_REQUEST_STATE recommendedState,
+        __in BOOTSTRAPPER_CACHE_TYPE recommendedCacheType,
+        __inout BOOTSTRAPPER_REQUEST_STATE* pRequestState,
+        __inout BOOTSTRAPPER_CACHE_TYPE* pRequestedCacheType,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+        WIXSTDBA_PACKAGE_INFO* pPackageInfo = NULL;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        // If we're planning to install prerequisites, install them. The prerequisites need to be installed
+        // in all cases (even uninstall!) so the BA can load next.
+        if (m_fPrereq)
+        {
+            // Only install prerequisite packages, and check the InstallCondition on them.
+            BOOL fInstall = FALSE;
+            hr = GetPackageInfo(wzPackageId, &pPackageInfo, &pPackage);
+            if (SUCCEEDED(hr) && pPackage->fPrereqPackage && pPackageInfo)
+            {
+                pPackageInfo->fPlannedToBeInstalled = fInstall = BOOTSTRAPPER_PACKAGE_CONDITION_FALSE != installCondition;
+            }
+
+            if (fInstall)
+            {
+                *pRequestState = BOOTSTRAPPER_REQUEST_STATE_PRESENT;
+            }
+            else
+            {
+                *pRequestState = BOOTSTRAPPER_REQUEST_STATE_NONE;
+            }
+
+            // Don't force cache packages while installing prerequisites.
+            if (BOOTSTRAPPER_CACHE_TYPE_FORCE == *pRequestedCacheType)
+            {
+                *pRequestedCacheType = BOOTSTRAPPER_CACHE_TYPE_KEEP;
+            }
+        }
+        else if (m_sczAfterForcedRestartPackage) // after force restart, skip packages until after the package that caused the restart.
+        {
+            // After restart we need to finish the dependency registration for our package so allow the package
+            // to go present.
+            if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, wzPackageId, -1, m_sczAfterForcedRestartPackage, -1))
+            {
+                // Do not allow a repair because that could put us in a perpetual restart loop.
+                if (BOOTSTRAPPER_REQUEST_STATE_REPAIR == *pRequestState)
+                {
+                    *pRequestState = BOOTSTRAPPER_REQUEST_STATE_PRESENT;
+                }
+
+                ReleaseNullStr(m_sczAfterForcedRestartPackage); // no more skipping now.
+            }
+            else // not the matching package, so skip it.
+            {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Skipping package: %ls, after restart because it was applied before the restart.", wzPackageId);
+
+                *pRequestState = BOOTSTRAPPER_REQUEST_STATE_NONE;
+            }
+        }
+
+        return CBalBaseBootstrapperApplication::OnPlanPackageBegin(wzPackageId, state, fCached, installCondition, recommendedState, recommendedCacheType, pRequestState, pRequestedCacheType, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnPlanMsiPackage(
+        __in_z LPCWSTR wzPackageId,
+        __in BOOL fExecute,
+        __in BOOTSTRAPPER_ACTION_STATE action,
+        __inout BOOL* pfCancel,
+        __inout BURN_MSI_PROPERTY* pActionMsiProperty,
+        __inout INSTALLUILEVEL* pUiLevel,
+        __inout BOOL* pfDisableExternalUiHandler
+        )
+    {
+        HRESULT hr = S_OK;
+        WIXSTDBA_PACKAGE_INFO* pPackageInfo = NULL;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+        BOOL fShowInternalUI = FALSE;
+        INSTALLUILEVEL uiLevel = INSTALLUILEVEL_NOCHANGE;
+
+        switch (m_command.display)
+        {
+        case BOOTSTRAPPER_DISPLAY_FULL:
+            uiLevel = INSTALLUILEVEL_FULL;
+            break;
+
+        case BOOTSTRAPPER_DISPLAY_PASSIVE:
+            uiLevel = INSTALLUILEVEL_REDUCED;
+            break;
+        }
+
+        if (INSTALLUILEVEL_NOCHANGE != uiLevel)
+        {
+            hr = GetPackageInfo(wzPackageId, &pPackageInfo, &pPackage);
+            if (SUCCEEDED(hr) && pPackage->sczDisplayInternalUICondition)
+            {
+                hr = BalEvaluateCondition(pPackage->sczDisplayInternalUICondition, &fShowInternalUI);
+                BalExitOnFailure(hr, "Failed to evaluate condition for package '%ls': %ls", wzPackageId, pPackage->sczDisplayInternalUICondition);
+
+                if (fShowInternalUI)
+                {
+                    *pUiLevel = uiLevel;
+                }
+            }
+        }
+
+    LExit:
+        return __super::OnPlanMsiPackage(wzPackageId, fExecute, action, pfCancel, pActionMsiProperty, pUiLevel, pfDisableExternalUiHandler);
+    }
+
+
+    virtual STDMETHODIMP OnPlanComplete(
+        __in HRESULT hrStatus
+        )
+    {
+        HRESULT hr = S_OK;
+
+        if (m_fPrereq)
+        {
+            m_fPrereqAlreadyInstalled = TRUE;
+
+            // Now that we've planned the packages, we can focus on the prerequisite packages that are supposed to be installed.
+            for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+            {
+                BAL_INFO_PACKAGE* pPackage = &m_Bundle.packages.rgPackages[i];
+                WIXSTDBA_PACKAGE_INFO* pPackageInfo = reinterpret_cast<WIXSTDBA_PACKAGE_INFO*>(pPackage->pvCustomData);
+                if (pPackage->fPrereqPackage && pPackageInfo && !pPackageInfo->fWasAlreadyInstalled && pPackageInfo->fPlannedToBeInstalled)
+                {
+                    m_fPrereqAlreadyInstalled = FALSE;
+                    break;
+                }
+            }
+        }
+
+        SetState(WIXSTDBA_STATE_PLANNED, hrStatus);
+
+        if (SUCCEEDED(hrStatus))
+        {
+            ::PostMessageW(m_hWnd, WM_WIXSTDBA_APPLY_PACKAGES, 0, 0);
+        }
+
+        m_fStartedExecution = FALSE;
+        m_dwCalculatedCacheProgress = 0;
+        m_dwCalculatedExecuteProgress = 0;
+
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnPauseAutomaticUpdatesBegin(
+        )
+    {
+        HRESULT hr = S_OK;
+        LOC_STRING* pLocString = NULL;
+        LPWSTR sczFormattedString = NULL;
+        LPCWSTR wz = NULL;
+
+        hr = __super::OnPauseAutomaticUpdatesBegin();
+
+        LocGetString(m_pWixLoc, L"#(loc.PauseAutomaticUpdatesMessage)", &pLocString);
+
+        if (pLocString)
+        {
+            BalFormatString(pLocString->wzText, &sczFormattedString);
+        }
+
+        wz = sczFormattedString ? sczFormattedString : L"Pausing Windows automatic updates";
+
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, wz);
+
+        ReleaseStr(sczFormattedString);
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnSystemRestorePointBegin(
+        )
+    {
+        HRESULT hr = S_OK;
+        LOC_STRING* pLocString = NULL;
+        LPWSTR sczFormattedString = NULL;
+        LPCWSTR wz = NULL;
+
+        hr = __super::OnSystemRestorePointBegin();
+
+        LocGetString(m_pWixLoc, L"#(loc.SystemRestorePointMessage)", &pLocString);
+
+        if (pLocString)
+        {
+            BalFormatString(pLocString->wzText, &sczFormattedString);
+        }
+
+        wz = sczFormattedString ? sczFormattedString : L"Creating system restore point";
+
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, wz);
+
+        ReleaseStr(sczFormattedString);
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnCachePackageBegin(
+        __in_z LPCWSTR wzPackageId,
+        __in DWORD cCachePayloads,
+        __in DWORD64 dw64PackageCacheSize,
+        __inout BOOL* pfCancel
+        )
+    {
+        if (wzPackageId && *wzPackageId)
+        {
+            BAL_INFO_PACKAGE* pPackage = NULL;
+            HRESULT hr = BalInfoFindPackageById(&m_Bundle.packages, wzPackageId, &pPackage);
+            LPCWSTR wz = (SUCCEEDED(hr) && pPackage->sczDisplayName) ? pPackage->sczDisplayName : wzPackageId;
+
+            ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_CACHE_PROGRESS_PACKAGE_TEXT, wz);
+
+            // If something started executing, leave it in the overall progress text.
+            if (!m_fStartedExecution)
+            {
+                ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, wz);
+            }
+        }
+
+        return __super::OnCachePackageBegin(wzPackageId, cCachePayloads, dw64PackageCacheSize, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnCacheAcquireProgress(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in DWORD64 dw64Progress,
+        __in DWORD64 dw64Total,
+        __in DWORD dwOverallPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnCacheAcquireProgress() - container/package: %ls, payload: %ls, progress: %I64u, total: %I64u, overall progress: %u%%", wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage);
+#endif
+
+        UpdateCacheProgress(dwOverallPercentage);
+
+        return __super::OnCacheAcquireProgress(wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnCacheContainerOrPayloadVerifyProgress(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in DWORD64 dw64Progress,
+        __in DWORD64 dw64Total,
+        __in DWORD dwOverallPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnCacheContainerOrPayloadVerifyProgress() - container/package: %ls, payload: %ls, progress: %I64u, total: %I64u, overall progress: %u%%", wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage);
+#endif
+
+        UpdateCacheProgress(dwOverallPercentage);
+
+        return __super::OnCacheContainerOrPayloadVerifyProgress(wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnCachePayloadExtractProgress(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in DWORD64 dw64Progress,
+        __in DWORD64 dw64Total,
+        __in DWORD dwOverallPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnCachePayloadExtractProgress() - container/package: %ls, payload: %ls, progress: %I64u, total: %I64u, overall progress: %u%%", wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage);
+#endif
+
+        UpdateCacheProgress(dwOverallPercentage);
+
+        return __super::OnCachePayloadExtractProgress(wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnCacheVerifyProgress(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in DWORD64 dw64Progress,
+        __in DWORD64 dw64Total,
+        __in DWORD dwOverallPercentage,
+        __in BOOTSTRAPPER_CACHE_VERIFY_STEP verifyStep,
+        __inout BOOL* pfCancel
+        )
+    {
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnCacheVerifyProgress() - container/package: %ls, payload: %ls, progress: %I64u, total: %I64u, overall progress: %u%%, step: %u", wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage, verifyStep);
+#endif
+
+        UpdateCacheProgress(dwOverallPercentage);
+
+        return __super::OnCacheVerifyProgress(wzPackageOrContainerId, wzPayloadId, dw64Progress, dw64Total, dwOverallPercentage, verifyStep, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnCacheAcquireComplete(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in HRESULT hrStatus,
+        __in BOOTSTRAPPER_CACHEACQUIRECOMPLETE_ACTION recommendation,
+        __inout BOOTSTRAPPER_CACHEACQUIRECOMPLETE_ACTION* pAction
+        )
+    {
+        SetProgressState(hrStatus);
+        return __super::OnCacheAcquireComplete(wzPackageOrContainerId, wzPayloadId, hrStatus, recommendation, pAction);
+    }
+
+
+    virtual STDMETHODIMP OnCacheContainerOrPayloadVerifyComplete(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in HRESULT hrStatus
+        )
+    {
+        SetProgressState(hrStatus);
+        return __super::OnCacheContainerOrPayloadVerifyComplete(wzPackageOrContainerId, wzPayloadId, hrStatus);
+    }
+
+
+    virtual STDMETHODIMP OnCachePayloadExtractComplete(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in HRESULT hrStatus
+        )
+    {
+        SetProgressState(hrStatus);
+        return __super::OnCachePayloadExtractComplete(wzPackageOrContainerId, wzPayloadId, hrStatus);
+    }
+
+
+    virtual STDMETHODIMP OnCacheVerifyComplete(
+        __in_z LPCWSTR wzPackageId,
+        __in_z LPCWSTR wzPayloadId,
+        __in HRESULT hrStatus,
+        __in BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION recommendation,
+        __inout BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION* pAction
+        )
+    {
+        SetProgressState(hrStatus);
+        return __super::OnCacheVerifyComplete(wzPackageId, wzPayloadId, hrStatus, recommendation, pAction);
+    }
+
+
+    virtual STDMETHODIMP OnCacheComplete(
+        __in HRESULT hrStatus
+        )
+    {
+        UpdateCacheProgress(SUCCEEDED(hrStatus) ? 100 : 0);
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_CACHE_PROGRESS_PACKAGE_TEXT, L"");
+        SetState(WIXSTDBA_STATE_CACHED, S_OK); // we always return success here and let OnApplyComplete() deal with the error.
+        return __super::OnCacheComplete(hrStatus);
+    }
+
+
+    virtual STDMETHODIMP OnError(
+        __in BOOTSTRAPPER_ERROR_TYPE errorType,
+        __in LPCWSTR wzPackageId,
+        __in DWORD dwCode,
+        __in_z LPCWSTR wzError,
+        __in DWORD dwUIHint,
+        __in DWORD /*cData*/,
+        __in_ecount_z_opt(cData) LPCWSTR* /*rgwzData*/,
+        __in int /*nRecommendation*/,
+        __inout int* pResult
+        )
+    {
+        HRESULT hr = S_OK;
+        int nResult = *pResult;
+        LPWSTR sczError = NULL;
+
+        if (BOOTSTRAPPER_DISPLAY_EMBEDDED == m_command.display)
+        {
+            hr = m_pEngine->SendEmbeddedError(dwCode, wzError, dwUIHint, &nResult);
+            if (FAILED(hr))
+            {
+                nResult = IDERROR;
+            }
+        }
+        else if (BOOTSTRAPPER_DISPLAY_FULL == m_command.display)
+        {
+            // If this is an authentication failure, let the engine try to handle it for us.
+            if (BOOTSTRAPPER_ERROR_TYPE_HTTP_AUTH_SERVER == errorType || BOOTSTRAPPER_ERROR_TYPE_HTTP_AUTH_PROXY == errorType)
+            {
+                nResult = IDTRYAGAIN;
+            }
+            else // show a generic error message box.
+            {
+                BalRetryErrorOccurred(wzPackageId, dwCode);
+
+                if (!m_fShowingInternalUiThisPackage)
+                {
+                    // If no error message was provided, use the error code to try and get an error message.
+                    if (!wzError || !*wzError || BOOTSTRAPPER_ERROR_TYPE_WINDOWS_INSTALLER != errorType)
+                    {
+                        hr = StrAllocFromError(&sczError, dwCode, NULL);
+                        if (FAILED(hr) || !sczError || !*sczError)
+                        {
+                            // special case for ERROR_FAIL_NOACTION_REBOOT: use loc string for Windows XP
+                            if (ERROR_FAIL_NOACTION_REBOOT == dwCode)
+                            {
+                                LOC_STRING* pLocString = NULL;
+                                hr = LocGetString(m_pWixLoc, L"#(loc.ErrorFailNoActionReboot)", &pLocString);
+                                if (SUCCEEDED(hr))
+                                {
+                                    StrAllocString(&sczError, pLocString->wzText, 0);
+                                }
+                                else
+                                {
+                                    StrAllocFormatted(&sczError, L"0x%x", dwCode);
+                                }
+                            }
+                            else
+                            {
+                                StrAllocFormatted(&sczError, L"0x%x", dwCode);
+                            }
+                        }
+                        hr = S_OK;
+                    }
+
+                    nResult = ::MessageBoxW(m_hWnd, sczError ? sczError : wzError, m_pTheme->sczCaption, dwUIHint);
+                }
+            }
+
+            SetProgressState(HRESULT_FROM_WIN32(dwCode));
+        }
+        else // just take note of the error code and let things continue.
+        {
+            BalRetryErrorOccurred(wzPackageId, dwCode);
+        }
+
+        ReleaseStr(sczError);
+        *pResult = nResult;
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnExecuteMsiMessage(
+        __in_z LPCWSTR wzPackageId,
+        __in INSTALLMESSAGE messageType,
+        __in DWORD dwUIHint,
+        __in_z LPCWSTR wzMessage,
+        __in DWORD cData,
+        __in_ecount_z_opt(cData) LPCWSTR* rgwzData,
+        __in int nRecommendation,
+        __inout int* pResult
+        )
+    {
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnExecuteMsiMessage() - package: %ls, message: %ls", wzPackageId, wzMessage);
+#endif
+        if (BOOTSTRAPPER_DISPLAY_FULL == m_command.display && (INSTALLMESSAGE_WARNING == messageType || INSTALLMESSAGE_USER == messageType))
+        {
+            if (!m_fShowingInternalUiThisPackage)
+            {
+                int nResult = ::MessageBoxW(m_hWnd, wzMessage, m_pTheme->sczCaption, dwUIHint);
+                return nResult;
+            }
+        }
+
+        if (INSTALLMESSAGE_ACTIONSTART == messageType)
+        {
+            ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_ACTIONDATA_TEXT, wzMessage);
+        }
+
+        return __super::OnExecuteMsiMessage(wzPackageId, messageType, dwUIHint, wzMessage, cData, rgwzData, nRecommendation, pResult);
+    }
+
+
+    virtual STDMETHODIMP OnProgress(
+        __in DWORD dwProgressPercentage,
+        __in DWORD dwOverallProgressPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+        WCHAR wzProgress[5] = { };
+
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnProgress() - progress: %u%%, overall progress: %u%%", dwProgressPercentage, dwOverallProgressPercentage);
+#endif
+
+        ::StringCchPrintfW(wzProgress, countof(wzProgress), L"%u%%", dwOverallProgressPercentage);
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_TEXT, wzProgress);
+
+        ThemeSetProgressControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_BAR, dwOverallProgressPercentage);
+        SetTaskbarButtonProgress(dwOverallProgressPercentage);
+
+        return __super::OnProgress(dwProgressPercentage, dwOverallProgressPercentage, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnExecutePackageBegin(
+        __in_z LPCWSTR wzPackageId,
+        __in BOOL fExecute,
+        __in BOOTSTRAPPER_ACTION_STATE action,
+        __in INSTALLUILEVEL uiLevel,
+        __in BOOL fDisableExternalUiHandler,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczFormattedString = NULL;
+        BOOL fShowingInternalUiThisPackage = FALSE;
+
+        m_fStartedExecution = TRUE;
+
+        if (wzPackageId && *wzPackageId)
+        {
+            BAL_INFO_PACKAGE* pPackage = NULL;
+            BalInfoFindPackageById(&m_Bundle.packages, wzPackageId, &pPackage);
+
+            LPCWSTR wz = wzPackageId;
+            if (pPackage)
+            {
+                LOC_STRING* pLocString = NULL;
+
+                switch (pPackage->type)
+                {
+                case BAL_INFO_PACKAGE_TYPE_BUNDLE_ADDON:
+                    LocGetString(m_pWixLoc, L"#(loc.ExecuteAddonRelatedBundleMessage)", &pLocString);
+                    break;
+
+                case BAL_INFO_PACKAGE_TYPE_BUNDLE_PATCH:
+                    LocGetString(m_pWixLoc, L"#(loc.ExecutePatchRelatedBundleMessage)", &pLocString);
+                    break;
+
+                case BAL_INFO_PACKAGE_TYPE_BUNDLE_UPGRADE:
+                    LocGetString(m_pWixLoc, L"#(loc.ExecuteUpgradeRelatedBundleMessage)", &pLocString);
+                    break;
+                }
+
+                if (pLocString)
+                {
+                    // If the wix developer is showing a hidden variable in the UI, then obviously they don't care about keeping it safe
+                    // so don't go down the rabbit hole of making sure that this is securely freed.
+                    BalFormatString(pLocString->wzText, &sczFormattedString);
+                }
+
+                wz = sczFormattedString ? sczFormattedString : pPackage->sczDisplayName ? pPackage->sczDisplayName : wzPackageId;
+            }
+
+            fShowingInternalUiThisPackage = INSTALLUILEVEL_NONE != (INSTALLUILEVEL_NONE & uiLevel);
+
+            ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_PACKAGE_TEXT, wz);
+            ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, wz);
+        }
+
+        ::EnterCriticalSection(&m_csShowingInternalUiThisPackage);
+        m_fShowingInternalUiThisPackage = fShowingInternalUiThisPackage;
+        hr = __super::OnExecutePackageBegin(wzPackageId, fExecute, action, uiLevel, fDisableExternalUiHandler, pfCancel);
+        ::LeaveCriticalSection(&m_csShowingInternalUiThisPackage);
+
+        ReleaseStr(sczFormattedString);
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnExecuteProgress(
+        __in_z LPCWSTR wzPackageId,
+        __in DWORD dwProgressPercentage,
+        __in DWORD dwOverallProgressPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+        WCHAR wzProgress[5] = { };
+
+#ifdef DEBUG
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: OnExecuteProgress() - package: %ls, progress: %u%%, overall progress: %u%%", wzPackageId, dwProgressPercentage, dwOverallProgressPercentage);
+#endif
+
+        ::StringCchPrintfW(wzProgress, countof(wzProgress), L"%u%%", dwOverallProgressPercentage);
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_TEXT, wzProgress);
+
+        ThemeSetProgressControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_BAR, dwOverallProgressPercentage);
+
+        m_dwCalculatedExecuteProgress = dwOverallProgressPercentage * (100 - WIXSTDBA_ACQUIRE_PERCENTAGE) / 100;
+        ThemeSetProgressControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_CALCULATED_PROGRESS_BAR, m_dwCalculatedCacheProgress + m_dwCalculatedExecuteProgress);
+
+        SetTaskbarButtonProgress(m_dwCalculatedCacheProgress + m_dwCalculatedExecuteProgress);
+
+        return __super::OnExecuteProgress(wzPackageId, dwProgressPercentage, dwOverallProgressPercentage, pfCancel);
+    }
+
+
+    virtual STDMETHODIMP OnExecutePackageComplete(
+        __in_z LPCWSTR wzPackageId,
+        __in HRESULT hrStatus,
+        __in BOOTSTRAPPER_APPLY_RESTART restart,
+        __in BOOTSTRAPPER_EXECUTEPACKAGECOMPLETE_ACTION recommendation,
+        __inout BOOTSTRAPPER_EXECUTEPACKAGECOMPLETE_ACTION* pAction
+        )
+    {
+        HRESULT hr = S_OK;
+        SetProgressState(hrStatus);
+
+        hr = __super::OnExecutePackageComplete(wzPackageId, hrStatus, restart, recommendation, pAction);
+
+        WIXSTDBA_PACKAGE_INFO* pPackageInfo = NULL;
+        BAL_INFO_PACKAGE* pPackage;
+        HRESULT hrPrereq = GetPackageInfo(wzPackageId, &pPackageInfo, &pPackage);
+        if (SUCCEEDED(hrPrereq) && pPackageInfo)
+        {
+            pPackageInfo->fSuccessfullyInstalled = SUCCEEDED(hrStatus);
+
+            // If the prerequisite required a restart (any restart) then do an immediate
+            // restart to ensure that the bundle will get launched again post reboot.
+            if (m_fPrereq && pPackage->fPrereqPackage && BOOTSTRAPPER_APPLY_RESTART_NONE != restart)
+            {
+                *pAction = BOOTSTRAPPER_EXECUTEPACKAGECOMPLETE_ACTION_RESTART;
+            }
+        }
+
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnExecuteComplete(
+        __in HRESULT hrStatus
+        )
+    {
+        HRESULT hr = S_OK;
+
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_PACKAGE_TEXT, L"");
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_EXECUTE_PROGRESS_ACTIONDATA_TEXT, L"");
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_PROGRESS_PACKAGE_TEXT, L"");
+        ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON, FALSE); // no more cancel.
+        m_fShowingInternalUiThisPackage = FALSE;
+
+        SetState(WIXSTDBA_STATE_EXECUTED, S_OK); // we always return success here and let OnApplyComplete() deal with the error.
+        SetProgressState(hrStatus);
+
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnCacheAcquireResolving(
+        __in_z_opt LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in_z LPCWSTR* rgSearchPaths,
+        __in DWORD /*cSearchPaths*/,
+        __in BOOL /*fFoundLocal*/,
+        __in DWORD dwRecommendedSearchPath,
+        __in_z_opt LPCWSTR /*wzDownloadUrl*/,
+        __in_z_opt LPCWSTR /*wzPayloadContainerId*/,
+        __in BOOTSTRAPPER_CACHE_RESOLVE_OPERATION /*recommendation*/,
+        __inout DWORD* /*pdwChosenSearchPath*/,
+        __inout BOOTSTRAPPER_CACHE_RESOLVE_OPERATION* pAction,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+
+        if (BOOTSTRAPPER_CACHE_RESOLVE_NONE == *pAction && BOOTSTRAPPER_DISPLAY_FULL == m_command.display) // prompt to change the source location.
+        {
+            OPENFILENAMEW ofn = { };
+            WCHAR wzFile[MAX_PATH] = { };
+
+            ::StringCchCopyW(wzFile, countof(wzFile), rgSearchPaths[dwRecommendedSearchPath]);
+
+            ofn.lStructSize = sizeof(ofn);
+            ofn.hwndOwner = m_hWnd;
+            ofn.lpstrFile = wzFile;
+            ofn.nMaxFile = countof(wzFile);
+            ofn.lpstrFilter = L"All Files\0*.*\0";
+            ofn.nFilterIndex = 1;
+            ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
+            ofn.lpstrTitle = m_pTheme->sczCaption;
+
+            if (::GetOpenFileNameW(&ofn))
+            {
+                hr = m_pEngine->SetLocalSource(wzPackageOrContainerId, wzPayloadId, ofn.lpstrFile);
+                *pAction = BOOTSTRAPPER_CACHE_RESOLVE_RETRY;
+            }
+            else
+            {
+                *pfCancel = TRUE;
+            }
+        }
+        // else there's nothing more we can do in non-interactive mode
+
+        *pfCancel |= CheckCanceled();
+        return hr;
+    }
+
+
+    virtual STDMETHODIMP OnApplyComplete(
+        __in HRESULT hrStatus,
+        __in BOOTSTRAPPER_APPLY_RESTART restart,
+        __in BOOTSTRAPPER_APPLYCOMPLETE_ACTION recommendation,
+        __inout BOOTSTRAPPER_APPLYCOMPLETE_ACTION* pAction
+        )
+    {
+        HRESULT hr = S_OK;
+
+        __super::OnApplyComplete(hrStatus, restart, recommendation, pAction);
+
+        m_restartResult = restart; // remember the restart result so we return the correct error code no matter what the user chooses to do in the UI.
+
+        // If a restart was encountered and we are not suppressing restarts, then restart is required.
+        m_fRestartRequired = (BOOTSTRAPPER_APPLY_RESTART_NONE != restart && BOOTSTRAPPER_RESTART_NEVER < m_command.restart);
+        BalSetStringVariable(WIXSTDBA_VARIABLE_RESTART_REQUIRED, m_fRestartRequired ? L"1" : NULL, FALSE);
+
+        // If a restart is required and we're not displaying a UI or we are not supposed to prompt for restart then allow the restart.
+        m_fAllowRestart = m_fRestartRequired && (BOOTSTRAPPER_DISPLAY_FULL > m_command.display || BOOTSTRAPPER_RESTART_PROMPT < m_command.restart);
+
+        if (m_fPrereq)
+        {
+            m_fPrereqInstalled = TRUE;
+            BOOL fInstalledAPackage = FALSE;
+
+            for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+            {
+                BAL_INFO_PACKAGE* pPackage = &m_Bundle.packages.rgPackages[i];
+                WIXSTDBA_PACKAGE_INFO* pPackageInfo = reinterpret_cast<WIXSTDBA_PACKAGE_INFO*>(pPackage->pvCustomData);
+                if (pPackage->fPrereqPackage && pPackageInfo && pPackageInfo->fPlannedToBeInstalled && !pPackageInfo->fWasAlreadyInstalled)
+                {
+                    if (pPackageInfo->fSuccessfullyInstalled)
+                    {
+                        fInstalledAPackage = TRUE;
+                    }
+                    else
+                    {
+                        m_fPrereqInstalled = FALSE;
+                        break;
+                    }
+                }
+            }
+
+            m_fPrereqInstalled = m_fPrereqInstalled && fInstalledAPackage;
+        }
+
+        // If we are showing UI, wait a beat before moving to the final screen.
+        if (BOOTSTRAPPER_DISPLAY_NONE < m_command.display)
+        {
+            ::Sleep(250);
+        }
+
+        SetState(WIXSTDBA_STATE_APPLIED, hrStatus);
+        SetTaskbarButtonProgress(100); // show full progress bar, green, yellow, or red
+
+        *pAction = BOOTSTRAPPER_APPLYCOMPLETE_ACTION_NONE;
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnLaunchApprovedExeComplete(
+        __in HRESULT hrStatus,
+        __in DWORD /*processId*/
+        )
+    {
+        HRESULT hr = S_OK;
+
+        if (HRESULT_FROM_WIN32(ERROR_ACCESS_DENIED) == hrStatus)
+        {
+            //try with ShelExec next time
+            OnClickLaunchButton();
+        }
+        else
+        {
+            ::PostMessageW(m_hWnd, WM_CLOSE, 0, 0);
+        }
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP_(void) BAProcFallback(
+        __in BOOTSTRAPPER_APPLICATION_MESSAGE message,
+        __in const LPVOID pvArgs,
+        __inout LPVOID pvResults,
+        __inout HRESULT* phr,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+        if (!m_pfnBAFunctionsProc || FAILED(*phr))
+        {
+            return;
+        }
+
+        // Always log before and after so we don't get blamed when BAFunctions changes something.
+        switch (message)
+        {
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTBEGIN:
+            OnDetectBeginFallback(reinterpret_cast<BA_ONDETECTBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTCOMPLETE:
+            OnDetectCompleteFallback(reinterpret_cast<BA_ONDETECTCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANBEGIN:
+            OnPlanBeginFallback(reinterpret_cast<BA_ONPLANBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPLETE:
+            OnPlanCompleteFallback(reinterpret_cast<BA_ONPLANCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSTARTUP: // BAFunctions is loaded during this event on a separate thread so it's not possible to forward it.
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSHUTDOWN:
+            OnShutdownFallback(reinterpret_cast<BA_ONSHUTDOWN_ARGS*>(pvArgs), reinterpret_cast<BA_ONSHUTDOWN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSYSTEMSHUTDOWN:
+            OnSystemShutdownFallback(reinterpret_cast<BA_ONSYSTEMSHUTDOWN_ARGS*>(pvArgs), reinterpret_cast<BA_ONSYSTEMSHUTDOWN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE:
+            OnDetectForwardCompatibleBundleFallback(reinterpret_cast<BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATEBEGIN:
+            OnDetectUpdateBeginFallback(reinterpret_cast<BA_ONDETECTUPDATEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATE:
+            OnDetectUpdateFallback(reinterpret_cast<BA_ONDETECTUPDATE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATECOMPLETE:
+            OnDetectUpdateCompleteFallback(reinterpret_cast<BA_ONDETECTUPDATECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDBUNDLE:
+            OnDetectRelatedBundleFallback(reinterpret_cast<BA_ONDETECTRELATEDBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTRELATEDBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGEBEGIN:
+            OnDetectPackageBeginFallback(reinterpret_cast<BA_ONDETECTPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDMSIPACKAGE:
+            OnDetectRelatedMsiPackageFallback(reinterpret_cast<BA_ONDETECTRELATEDMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTRELATEDMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPATCHTARGET:
+            OnDetectPatchTargetFallback(reinterpret_cast<BA_ONDETECTPATCHTARGET_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTPATCHTARGET_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTMSIFEATURE:
+            OnDetectMsiFeatureFallback(reinterpret_cast<BA_ONDETECTMSIFEATURE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTMSIFEATURE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGECOMPLETE:
+            OnDetectPackageCompleteFallback(reinterpret_cast<BA_ONDETECTPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANRELATEDBUNDLE:
+            OnPlanRelatedBundleFallback(reinterpret_cast<BA_ONPLANRELATEDBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANRELATEDBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGEBEGIN:
+            OnPlanPackageBeginFallback(reinterpret_cast<BA_ONPLANPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPATCHTARGET:
+            OnPlanPatchTargetFallback(reinterpret_cast<BA_ONPLANPATCHTARGET_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANPATCHTARGET_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANMSIFEATURE:
+            OnPlanMsiFeatureFallback(reinterpret_cast<BA_ONPLANMSIFEATURE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANMSIFEATURE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGECOMPLETE:
+            OnPlanPackageCompleteFallback(reinterpret_cast<BA_ONPLANPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYBEGIN:
+            OnApplyBeginFallback(reinterpret_cast<BA_ONAPPLYBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONAPPLYBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATEBEGIN:
+            OnElevateBeginFallback(reinterpret_cast<BA_ONELEVATEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONELEVATEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATECOMPLETE:
+            OnElevateCompleteFallback(reinterpret_cast<BA_ONELEVATECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONELEVATECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPROGRESS:
+            OnProgressFallback(reinterpret_cast<BA_ONPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONERROR:
+            OnErrorFallback(reinterpret_cast<BA_ONERROR_ARGS*>(pvArgs), reinterpret_cast<BA_ONERROR_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERBEGIN:
+            OnRegisterBeginFallback(reinterpret_cast<BA_ONREGISTERBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONREGISTERBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERCOMPLETE:
+            OnRegisterCompleteFallback(reinterpret_cast<BA_ONREGISTERCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONREGISTERCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEBEGIN:
+            OnCacheBeginFallback(reinterpret_cast<BA_ONCACHEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGEBEGIN:
+            OnCachePackageBeginFallback(reinterpret_cast<BA_ONCACHEPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREBEGIN:
+            OnCacheAcquireBeginFallback(reinterpret_cast<BA_ONCACHEACQUIREBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIREBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREPROGRESS:
+            OnCacheAcquireProgressFallback(reinterpret_cast<BA_ONCACHEACQUIREPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIREPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIRERESOLVING:
+            OnCacheAcquireResolvingFallback(reinterpret_cast<BA_ONCACHEACQUIRERESOLVING_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIRERESOLVING_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIRECOMPLETE:
+            OnCacheAcquireCompleteFallback(reinterpret_cast<BA_ONCACHEACQUIRECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIRECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYBEGIN:
+            OnCacheVerifyBeginFallback(reinterpret_cast<BA_ONCACHEVERIFYBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEVERIFYBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYCOMPLETE:
+            OnCacheVerifyCompleteFallback(reinterpret_cast<BA_ONCACHEVERIFYCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEVERIFYCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGECOMPLETE:
+            OnCachePackageCompleteFallback(reinterpret_cast<BA_ONCACHEPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECOMPLETE:
+            OnCacheCompleteFallback(reinterpret_cast<BA_ONCACHECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEBEGIN:
+            OnExecuteBeginFallback(reinterpret_cast<BA_ONEXECUTEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGEBEGIN:
+            OnExecutePackageBeginFallback(reinterpret_cast<BA_ONEXECUTEPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPATCHTARGET:
+            OnExecutePatchTargetFallback(reinterpret_cast<BA_ONEXECUTEPATCHTARGET_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPATCHTARGET_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPROGRESS:
+            OnExecuteProgressFallback(reinterpret_cast<BA_ONEXECUTEPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEMSIMESSAGE:
+            OnExecuteMsiMessageFallback(reinterpret_cast<BA_ONEXECUTEMSIMESSAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEMSIMESSAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEFILESINUSE:
+            OnExecuteFilesInUseFallback(reinterpret_cast<BA_ONEXECUTEFILESINUSE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEFILESINUSE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGECOMPLETE:
+            OnExecutePackageCompleteFallback(reinterpret_cast<BA_ONEXECUTEPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTECOMPLETE:
+            OnExecuteCompleteFallback(reinterpret_cast<BA_ONEXECUTECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERBEGIN:
+            OnUnregisterBeginFallback(reinterpret_cast<BA_ONUNREGISTERBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONUNREGISTERBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERCOMPLETE:
+            OnUnregisterCompleteFallback(reinterpret_cast<BA_ONUNREGISTERCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONUNREGISTERCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYCOMPLETE:
+            OnApplyCompleteFallback(reinterpret_cast<BA_ONAPPLYCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONAPPLYCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN:
+            OnLaunchApprovedExeBeginFallback(reinterpret_cast<BA_ONLAUNCHAPPROVEDEXEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONLAUNCHAPPROVEDEXEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE:
+            OnLaunchApprovedExeCompleteFallback(reinterpret_cast<BA_ONLAUNCHAPPROVEDEXECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONLAUNCHAPPROVEDEXECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANMSIPACKAGE:
+            OnPlanMsiPackageFallback(reinterpret_cast<BA_ONPLANMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONBEGINMSITRANSACTIONBEGIN:
+            OnBeginMsiTransactionBeginFallback(reinterpret_cast<BA_ONBEGINMSITRANSACTIONBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONBEGINMSITRANSACTIONBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONBEGINMSITRANSACTIONCOMPLETE:
+            OnBeginMsiTransactionCompleteFallback(reinterpret_cast<BA_ONBEGINMSITRANSACTIONCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONBEGINMSITRANSACTIONCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCOMMITMSITRANSACTIONBEGIN:
+            OnCommitMsiTransactionBeginFallback(reinterpret_cast<BA_ONCOMMITMSITRANSACTIONBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCOMMITMSITRANSACTIONBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCOMMITMSITRANSACTIONCOMPLETE:
+            OnCommitMsiTransactionCompleteFallback(reinterpret_cast<BA_ONCOMMITMSITRANSACTIONCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCOMMITMSITRANSACTIONCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONROLLBACKMSITRANSACTIONBEGIN:
+            OnRollbackMsiTransactionBeginFallback(reinterpret_cast<BA_ONROLLBACKMSITRANSACTIONBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONROLLBACKMSITRANSACTIONBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONROLLBACKMSITRANSACTIONCOMPLETE:
+            OnRollbackMsiTransactionCompleteFallback(reinterpret_cast<BA_ONROLLBACKMSITRANSACTIONCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONROLLBACKMSITRANSACTIONCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPAUSEAUTOMATICUPDATESBEGIN:
+            OnPauseAutomaticUpdatesBeginFallback(reinterpret_cast<BA_ONPAUSEAUTOMATICUPDATESBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPAUSEAUTOMATICUPDATESBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPAUSEAUTOMATICUPDATESCOMPLETE:
+            OnPauseAutomaticUpdatesCompleteFallback(reinterpret_cast<BA_ONPAUSEAUTOMATICUPDATESCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPAUSEAUTOMATICUPDATESCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSYSTEMRESTOREPOINTBEGIN:
+            OnSystemRestorePointBeginFallback(reinterpret_cast<BA_ONSYSTEMRESTOREPOINTBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONSYSTEMRESTOREPOINTBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSYSTEMRESTOREPOINTCOMPLETE:
+            OnSystemRestorePointCompleteFallback(reinterpret_cast<BA_ONSYSTEMRESTOREPOINTCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONSYSTEMRESTOREPOINTCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANNEDPACKAGE:
+            OnPlannedPackageFallback(reinterpret_cast<BA_ONPLANNEDPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANNEDPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYPROGRESS:
+            OnCacheVerifyProgressFallback(reinterpret_cast<BA_ONCACHEVERIFYPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEVERIFYPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYBEGIN:
+            OnCacheContainerOrPayloadVerifyBeginFallback(reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE:
+            OnCacheContainerOrPayloadVerifyCompleteFallback(reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS:
+            OnCacheContainerOrPayloadVerifyProgressFallback(reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPAYLOADEXTRACTBEGIN:
+            OnCachePayloadExtractBeginFallback(reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPAYLOADEXTRACTCOMPLETE:
+            OnCachePayloadExtractCompleteFallback(reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPAYLOADEXTRACTPROGRESS:
+            OnCachePayloadExtractProgressFallback(reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPAYLOADEXTRACTPROGRESS_RESULTS*>(pvResults));
+            break;
+        default:
+#ifdef DEBUG
+            BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: Forwarding unknown BA message: %d", message);
+#endif
+            m_pfnBAFunctionsProc((BA_FUNCTIONS_MESSAGE)message, pvArgs, pvResults, m_pvBAFunctionsProcContext);
+            break;
+        }
+    }
+
+
+private: // privates
+    void OnDetectBeginFallback(
+        __in BA_ONDETECTBEGIN_ARGS* pArgs,
+        __inout BA_ONDETECTBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectCompleteFallback(
+        __in BA_ONDETECTCOMPLETE_ARGS* pArgs,
+        __inout BA_ONDETECTCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlanBeginFallback(
+        __in BA_ONPLANBEGIN_ARGS* pArgs,
+        __inout BA_ONPLANBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlanCompleteFallback(
+        __in BA_ONPLANCOMPLETE_ARGS* pArgs,
+        __inout BA_ONPLANCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnShutdownFallback(
+        __in BA_ONSHUTDOWN_ARGS* pArgs,
+        __inout BA_ONSHUTDOWN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONSHUTDOWN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnSystemShutdownFallback(
+        __in BA_ONSYSTEMSHUTDOWN_ARGS* pArgs,
+        __inout BA_ONSYSTEMSHUTDOWN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONSYSTEMSHUTDOWN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectForwardCompatibleBundleFallback(
+        __in BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_ARGS* pArgs,
+        __inout BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectUpdateBeginFallback(
+        __in BA_ONDETECTUPDATEBEGIN_ARGS* pArgs,
+        __inout BA_ONDETECTUPDATEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTUPDATEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectUpdateFallback(
+        __in BA_ONDETECTUPDATE_ARGS* pArgs,
+        __inout BA_ONDETECTUPDATE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTUPDATE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectUpdateCompleteFallback(
+        __in BA_ONDETECTUPDATECOMPLETE_ARGS* pArgs,
+        __inout BA_ONDETECTUPDATECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTUPDATECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectRelatedBundleFallback(
+        __in BA_ONDETECTRELATEDBUNDLE_ARGS* pArgs,
+        __inout BA_ONDETECTRELATEDBUNDLE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDBUNDLE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectPackageBeginFallback(
+        __in BA_ONDETECTPACKAGEBEGIN_ARGS* pArgs,
+        __inout BA_ONDETECTPACKAGEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectRelatedMsiPackageFallback(
+        __in BA_ONDETECTRELATEDMSIPACKAGE_ARGS* pArgs,
+        __inout BA_ONDETECTRELATEDMSIPACKAGE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDMSIPACKAGE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectPatchTargetFallback(
+        __in BA_ONDETECTPATCHTARGET_ARGS* pArgs,
+        __inout BA_ONDETECTPATCHTARGET_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTPATCHTARGET, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectMsiFeatureFallback(
+        __in BA_ONDETECTMSIFEATURE_ARGS* pArgs,
+        __inout BA_ONDETECTMSIFEATURE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTMSIFEATURE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnDetectPackageCompleteFallback(
+        __in BA_ONDETECTPACKAGECOMPLETE_ARGS* pArgs,
+        __inout BA_ONDETECTPACKAGECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlanRelatedBundleFallback(
+        __in BA_ONPLANRELATEDBUNDLE_ARGS* pArgs,
+        __inout BA_ONPLANRELATEDBUNDLE_RESULTS* pResults
+        )
+    {
+        BOOTSTRAPPER_REQUEST_STATE requestedState = pResults->requestedState;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANRELATEDBUNDLE, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_RELATED_BUNDLE, m_hModule, pArgs->wzBundleId, LoggingRequestStateToString(requestedState), LoggingRequestStateToString(pResults->requestedState));
+    }
+
+    void OnPlanPackageBeginFallback(
+        __in BA_ONPLANPACKAGEBEGIN_ARGS* pArgs,
+        __inout BA_ONPLANPACKAGEBEGIN_RESULTS* pResults
+        )
+    {
+        BOOTSTRAPPER_REQUEST_STATE requestedState = pResults->requestedState;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANPACKAGEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_PACKAGE, m_hModule, pArgs->wzPackageId, LoggingRequestStateToString(requestedState), LoggingRequestStateToString(pResults->requestedState));
+    }
+
+    void OnPlanPatchTargetFallback(
+        __in BA_ONPLANPATCHTARGET_ARGS* pArgs,
+        __inout BA_ONPLANPATCHTARGET_RESULTS* pResults
+        )
+    {
+        BOOTSTRAPPER_REQUEST_STATE requestedState = pResults->requestedState;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANPATCHTARGET, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_TARGET_MSI_PACKAGE, m_hModule, pArgs->wzPackageId, pArgs->wzProductCode, LoggingRequestStateToString(requestedState), LoggingRequestStateToString(pResults->requestedState));
+    }
+
+    void OnPlanMsiFeatureFallback(
+        __in BA_ONPLANMSIFEATURE_ARGS* pArgs,
+        __inout BA_ONPLANMSIFEATURE_RESULTS* pResults
+        )
+    {
+        BOOTSTRAPPER_FEATURE_STATE requestedState = pResults->requestedState;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANMSIFEATURE, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_MSI_FEATURE, m_hModule, pArgs->wzPackageId, pArgs->wzFeatureId, LoggingMsiFeatureStateToString(requestedState), LoggingMsiFeatureStateToString(pResults->requestedState));
+    }
+
+    void OnPlanPackageCompleteFallback(
+        __in BA_ONPLANPACKAGECOMPLETE_ARGS* pArgs,
+        __inout BA_ONPLANPACKAGECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANPACKAGECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlannedPackageFallback(
+        __in BA_ONPLANNEDPACKAGE_ARGS* pArgs,
+        __inout BA_ONPLANNEDPACKAGE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANNEDPACKAGE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnApplyBeginFallback(
+        __in BA_ONAPPLYBEGIN_ARGS* pArgs,
+        __inout BA_ONAPPLYBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONAPPLYBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnElevateBeginFallback(
+        __in BA_ONELEVATEBEGIN_ARGS* pArgs,
+        __inout BA_ONELEVATEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONELEVATEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnElevateCompleteFallback(
+        __in BA_ONELEVATECOMPLETE_ARGS* pArgs,
+        __inout BA_ONELEVATECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONELEVATECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnProgressFallback(
+        __in BA_ONPROGRESS_ARGS* pArgs,
+        __inout BA_ONPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnErrorFallback(
+        __in BA_ONERROR_ARGS* pArgs,
+        __inout BA_ONERROR_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONERROR, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnRegisterBeginFallback(
+        __in BA_ONREGISTERBEGIN_ARGS* pArgs,
+        __inout BA_ONREGISTERBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONREGISTERBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnRegisterCompleteFallback(
+        __in BA_ONREGISTERCOMPLETE_ARGS* pArgs,
+        __inout BA_ONREGISTERCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONREGISTERCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheBeginFallback(
+        __in BA_ONCACHEBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCachePackageBeginFallback(
+        __in BA_ONCACHEPACKAGEBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHEPACKAGEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheAcquireBeginFallback(
+        __in BA_ONCACHEACQUIREBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHEACQUIREBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheAcquireProgressFallback(
+        __in BA_ONCACHEACQUIREPROGRESS_ARGS* pArgs,
+        __inout BA_ONCACHEACQUIREPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheAcquireResolvingFallback(
+        __in BA_ONCACHEACQUIRERESOLVING_ARGS* pArgs,
+        __inout BA_ONCACHEACQUIRERESOLVING_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEACQUIRERESOLVING, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheAcquireCompleteFallback(
+        __in BA_ONCACHEACQUIRECOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHEACQUIRECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEACQUIRECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheVerifyBeginFallback(
+        __in BA_ONCACHEVERIFYBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHEVERIFYBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheVerifyCompleteFallback(
+        __in BA_ONCACHEVERIFYCOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHEVERIFYCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCachePackageCompleteFallback(
+        __in BA_ONCACHEPACKAGECOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHEPACKAGECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheCompleteFallback(
+        __in BA_ONCACHECOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecuteBeginFallback(
+        __in BA_ONEXECUTEBEGIN_ARGS* pArgs,
+        __inout BA_ONEXECUTEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecutePackageBeginFallback(
+        __in BA_ONEXECUTEPACKAGEBEGIN_ARGS* pArgs,
+        __inout BA_ONEXECUTEPACKAGEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecutePatchTargetFallback(
+        __in BA_ONEXECUTEPATCHTARGET_ARGS* pArgs,
+        __inout BA_ONEXECUTEPATCHTARGET_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEPATCHTARGET, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecuteProgressFallback(
+        __in BA_ONEXECUTEPROGRESS_ARGS* pArgs,
+        __inout BA_ONEXECUTEPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecuteMsiMessageFallback(
+        __in BA_ONEXECUTEMSIMESSAGE_ARGS* pArgs,
+        __inout BA_ONEXECUTEMSIMESSAGE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEMSIMESSAGE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecuteFilesInUseFallback(
+        __in BA_ONEXECUTEFILESINUSE_ARGS* pArgs,
+        __inout BA_ONEXECUTEFILESINUSE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEFILESINUSE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecutePackageCompleteFallback(
+        __in BA_ONEXECUTEPACKAGECOMPLETE_ARGS* pArgs,
+        __inout BA_ONEXECUTEPACKAGECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnExecuteCompleteFallback(
+        __in BA_ONEXECUTECOMPLETE_ARGS* pArgs,
+        __inout BA_ONEXECUTECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONEXECUTECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnUnregisterBeginFallback(
+        __in BA_ONUNREGISTERBEGIN_ARGS* pArgs,
+        __inout BA_ONUNREGISTERBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONUNREGISTERBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnUnregisterCompleteFallback(
+        __in BA_ONUNREGISTERCOMPLETE_ARGS* pArgs,
+        __inout BA_ONUNREGISTERCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONUNREGISTERCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnApplyCompleteFallback(
+        __in BA_ONAPPLYCOMPLETE_ARGS* pArgs,
+        __inout BA_ONAPPLYCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONAPPLYCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnLaunchApprovedExeBeginFallback(
+        __in BA_ONLAUNCHAPPROVEDEXEBEGIN_ARGS* pArgs,
+        __inout BA_ONLAUNCHAPPROVEDEXEBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnLaunchApprovedExeCompleteFallback(
+        __in BA_ONLAUNCHAPPROVEDEXECOMPLETE_ARGS* pArgs,
+        __inout BA_ONLAUNCHAPPROVEDEXECOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlanMsiPackageFallback(
+        __in BA_ONPLANMSIPACKAGE_ARGS* pArgs,
+        __inout BA_ONPLANMSIPACKAGE_RESULTS* pResults
+        )
+    {
+        BURN_MSI_PROPERTY actionMsiProperty = pResults->actionMsiProperty;
+        INSTALLUILEVEL uiLevel = pResults->uiLevel;
+        BOOL fDisableExternalUiHandler = pResults->fDisableExternalUiHandler;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANMSIPACKAGE, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_MSI_PACKAGE, m_hModule, pArgs->wzPackageId, actionMsiProperty, uiLevel, fDisableExternalUiHandler ? "yes" : "no", pResults->actionMsiProperty, pResults->uiLevel, pResults->fDisableExternalUiHandler ? "yes" : "no");
+    }
+
+    void OnBeginMsiTransactionBeginFallback(
+        __in BA_ONBEGINMSITRANSACTIONBEGIN_ARGS* pArgs,
+        __inout BA_ONBEGINMSITRANSACTIONBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONBEGINMSITRANSACTIONBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnBeginMsiTransactionCompleteFallback(
+        __in BA_ONBEGINMSITRANSACTIONCOMPLETE_ARGS* pArgs,
+        __inout BA_ONBEGINMSITRANSACTIONCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONBEGINMSITRANSACTIONCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCommitMsiTransactionBeginFallback(
+        __in BA_ONCOMMITMSITRANSACTIONBEGIN_ARGS* pArgs,
+        __inout BA_ONCOMMITMSITRANSACTIONBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCOMMITMSITRANSACTIONBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCommitMsiTransactionCompleteFallback(
+        __in BA_ONCOMMITMSITRANSACTIONCOMPLETE_ARGS* pArgs,
+        __inout BA_ONCOMMITMSITRANSACTIONCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCOMMITMSITRANSACTIONCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnRollbackMsiTransactionBeginFallback(
+        __in BA_ONROLLBACKMSITRANSACTIONBEGIN_ARGS* pArgs,
+        __inout BA_ONROLLBACKMSITRANSACTIONBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONROLLBACKMSITRANSACTIONBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnRollbackMsiTransactionCompleteFallback(
+        __in BA_ONROLLBACKMSITRANSACTIONCOMPLETE_ARGS* pArgs,
+        __inout BA_ONROLLBACKMSITRANSACTIONCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONROLLBACKMSITRANSACTIONCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPauseAutomaticUpdatesBeginFallback(
+        __in BA_ONPAUSEAUTOMATICUPDATESBEGIN_ARGS* pArgs,
+        __inout BA_ONPAUSEAUTOMATICUPDATESBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPAUSEAUTOMATICUPDATESBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPauseAutomaticUpdatesCompleteFallback(
+        __in BA_ONPAUSEAUTOMATICUPDATESCOMPLETE_ARGS* pArgs,
+        __inout BA_ONPAUSEAUTOMATICUPDATESCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPAUSEAUTOMATICUPDATESCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnSystemRestorePointBeginFallback(
+        __in BA_ONSYSTEMRESTOREPOINTBEGIN_ARGS* pArgs,
+        __inout BA_ONSYSTEMRESTOREPOINTBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONSYSTEMRESTOREPOINTBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnSystemRestorePointCompleteFallback(
+        __in BA_ONSYSTEMRESTOREPOINTCOMPLETE_ARGS* pArgs,
+        __inout BA_ONSYSTEMRESTOREPOINTCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONSYSTEMRESTOREPOINTCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnPlanForwardCompatibleBundleFallback(
+        __in BA_ONPLANFORWARDCOMPATIBLEBUNDLE_ARGS* pArgs,
+        __inout BA_ONPLANFORWARDCOMPATIBLEBUNDLE_RESULTS* pResults
+        )
+    {
+        BOOL fIgnoreBundle = pResults->fIgnoreBundle;
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONPLANFORWARDCOMPATIBLEBUNDLE, pArgs, pResults, m_pvBAFunctionsProcContext);
+        BalLogId(BOOTSTRAPPER_LOG_LEVEL_STANDARD, MSG_WIXSTDBA_PLANNED_FORWARD_COMPATIBLE_BUNDLE, m_hModule, pArgs->wzBundleId, fIgnoreBundle ? "ignore" : "enable", pResults->fIgnoreBundle ? "ignore" : "enable");
+    }
+
+    void OnCacheVerifyProgressFallback(
+        __in BA_ONCACHEVERIFYPROGRESS_ARGS* pArgs,
+        __inout BA_ONCACHEVERIFYPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheContainerOrPayloadVerifyBeginFallback(
+        __in BA_ONCACHECONTAINERORPAYLOADVERIFYBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHECONTAINERORPAYLOADVERIFYBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheContainerOrPayloadVerifyCompleteFallback(
+        __in BA_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCacheContainerOrPayloadVerifyProgressFallback(
+        __in BA_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS_ARGS* pArgs,
+        __inout BA_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHECONTAINERORPAYLOADVERIFYPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCachePayloadExtractBeginFallback(
+        __in BA_ONCACHEPAYLOADEXTRACTBEGIN_ARGS* pArgs,
+        __inout BA_ONCACHEPAYLOADEXTRACTBEGIN_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEPAYLOADEXTRACTBEGIN, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCachePayloadExtractCompleteFallback(
+        __in BA_ONCACHEPAYLOADEXTRACTCOMPLETE_ARGS* pArgs,
+        __inout BA_ONCACHEPAYLOADEXTRACTCOMPLETE_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEPAYLOADEXTRACTCOMPLETE, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    void OnCachePayloadExtractProgressFallback(
+        __in BA_ONCACHEPAYLOADEXTRACTPROGRESS_ARGS* pArgs,
+        __inout BA_ONCACHEPAYLOADEXTRACTPROGRESS_RESULTS* pResults
+        )
+    {
+        m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONCACHEPAYLOADEXTRACTPROGRESS, pArgs, pResults, m_pvBAFunctionsProcContext);
+    }
+
+    //
+    // UiThreadProc - entrypoint for UI thread.
+    //
+    static DWORD WINAPI UiThreadProc(
+        __in LPVOID pvContext
+        )
+    {
+        HRESULT hr = S_OK;
+        CWixStandardBootstrapperApplication* pThis = (CWixStandardBootstrapperApplication*)pvContext;
+        BOOL fComInitialized = FALSE;
+        BOOL fRet = FALSE;
+        MSG msg = { };
+
+        // Initialize COM and theme.
+        hr = ::CoInitialize(NULL);
+        BalExitOnFailure(hr, "Failed to initialize COM.");
+        fComInitialized = TRUE;
+
+        hr = ThemeInitialize(pThis->m_hModule);
+        BalExitOnFailure(hr, "Failed to initialize theme manager.");
+
+        hr = pThis->InitializeData();
+        BalExitOnFailure(hr, "Failed to initialize data in bootstrapper application.");
+
+        // Create main window.
+        pThis->InitializeTaskbarButton();
+        hr = pThis->CreateMainWindow();
+        BalExitOnFailure(hr, "Failed to create main window.");
+
+        if (FAILED(pThis->m_hrFinal))
+        {
+            pThis->SetState(WIXSTDBA_STATE_FAILED, hr);
+            ::PostMessageW(pThis->m_hWnd, WM_WIXSTDBA_SHOW_FAILURE, 0, 0);
+        }
+        else
+        {
+            // Okay, we're ready for packages now.
+            pThis->SetState(WIXSTDBA_STATE_INITIALIZED, hr);
+            ::PostMessageW(pThis->m_hWnd, BOOTSTRAPPER_ACTION_HELP == pThis->m_command.action ? WM_WIXSTDBA_SHOW_HELP : WM_WIXSTDBA_DETECT_PACKAGES, 0, 0);
+        }
+
+        // message pump
+        while (0 != (fRet = ::GetMessageW(&msg, NULL, 0, 0)))
+        {
+            if (-1 == fRet)
+            {
+                hr = E_UNEXPECTED;
+                BalExitOnFailure(hr, "Unexpected return value from message pump.");
+            }
+            else if (!ThemeHandleKeyboardMessage(pThis->m_pTheme, msg.hwnd, &msg))
+            {
+                ::TranslateMessage(&msg);
+                ::DispatchMessageW(&msg);
+            }
+        }
+
+        // Succeeded thus far, check to see if anything went wrong while actually
+        // executing changes.
+        if (FAILED(pThis->m_hrFinal))
+        {
+            hr = pThis->m_hrFinal;
+        }
+        else if (pThis->CheckCanceled())
+        {
+            hr = HRESULT_FROM_WIN32(ERROR_INSTALL_USEREXIT);
+        }
+
+    LExit:
+        // destroy main window
+        pThis->DestroyMainWindow();
+        pThis->UninitializeTaskbarButton();
+
+        // initiate engine shutdown
+        DWORD dwQuit = HRESULT_CODE(hr);
+        if (BOOTSTRAPPER_APPLY_RESTART_INITIATED == pThis->m_restartResult)
+        {
+            dwQuit = ERROR_SUCCESS_REBOOT_INITIATED;
+        }
+        else if (BOOTSTRAPPER_APPLY_RESTART_REQUIRED == pThis->m_restartResult)
+        {
+            dwQuit = ERROR_SUCCESS_REBOOT_REQUIRED;
+        }
+        pThis->m_pEngine->Quit(dwQuit);
+
+        ReleaseTheme(pThis->m_pTheme);
+        ThemeUninitialize();
+
+        // uninitialize COM
+        if (fComInitialized)
+        {
+            ::CoUninitialize();
+        }
+
+        return hr;
+    }
+
+
+    //
+    // InitializeData - initializes all the package and prerequisite information.
+    //
+    HRESULT InitializeData()
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczModulePath = NULL;
+        IXMLDOMDocument *pixdManifest = NULL;
+
+        hr = BalManifestLoad(m_hModule, &pixdManifest);
+        BalExitOnFailure(hr, "Failed to load bootstrapper application manifest.");
+
+        hr = ParseOverridableVariablesFromXml(pixdManifest);
+        BalExitOnFailure(hr, "Failed to read overridable variables.");
+
+        hr = ProcessCommandLine(&m_sczLanguage);
+        ExitOnFailure(hr, "Unknown commandline parameters.");
+
+        hr = PathRelativeToModule(&sczModulePath, NULL, m_hModule);
+        BalExitOnFailure(hr, "Failed to get module path.");
+
+        hr = LoadLocalization(sczModulePath, m_sczLanguage);
+        ExitOnFailure(hr, "Failed to load localization.");
+
+        hr = LoadTheme(sczModulePath, m_sczLanguage);
+        ExitOnFailure(hr, "Failed to load theme.");
+
+        hr = BalInfoParseFromXml(&m_Bundle, pixdManifest);
+        BalExitOnFailure(hr, "Failed to load bundle information.");
+
+        hr = BalConditionsParseFromXml(&m_Conditions, pixdManifest, m_pWixLoc);
+        BalExitOnFailure(hr, "Failed to load conditions from XML.");
+
+        hr = LoadBAFunctions(pixdManifest);
+        BalExitOnFailure(hr, "Failed to load bootstrapper functions.");
+
+        GetBundleFileVersion();
+        // don't fail if we couldn't get the version info; best-effort only
+
+        hr = InitializePackageInfo();
+        BalExitOnFailure(hr, "Failed to initialize wixstdba package information.");
+
+        if (m_fPrereq)
+        {
+            hr = InitializePrerequisiteInformation();
+            BalExitOnFailure(hr, "Failed to initialize prerequisite information.");
+        }
+        else
+        {
+            hr = ParseBootstrapperApplicationDataFromXml(pixdManifest);
+            BalExitOnFailure(hr, "Failed to read bootstrapper application data.");
+        }
+
+        if (BOOTSTRAPPER_ACTION_CACHE == m_plannedAction)
+        {
+            if (m_fSupportCacheOnly)
+            {
+                // Doesn't make sense to prompt the user if cache only is requested.
+                if (BOOTSTRAPPER_DISPLAY_PASSIVE < m_command.display)
+                {
+                    m_command.display = BOOTSTRAPPER_DISPLAY_PASSIVE;
+                }
+
+                m_command.action = BOOTSTRAPPER_ACTION_CACHE;
+            }
+            else
+            {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Ignoring attempt to only cache a bundle that does not explicitly support it.");
+                m_plannedAction = BOOTSTRAPPER_ACTION_UNKNOWN;
+            }
+        }
+
+    LExit:
+        ReleaseObject(pixdManifest);
+        ReleaseStr(sczModulePath);
+
+        return hr;
+    }
+
+
+    //
+    // ProcessCommandLine - process the provided command line arguments.
+    //
+    HRESULT ProcessCommandLine(
+        __inout LPWSTR* psczLanguage
+        )
+    {
+        HRESULT hr = S_OK;
+        int argc = 0;
+        LPWSTR* argv = NULL;
+        LPWSTR sczVariableName = NULL;
+        LPWSTR sczVariableValue = NULL;
+
+        if (m_command.wzCommandLine && *m_command.wzCommandLine)
+        {
+            hr = AppParseCommandLine(m_command.wzCommandLine, &argc, &argv);
+            ExitOnFailure(hr, "Failed to parse command line.");
+
+            for (int i = 0; i < argc; ++i)
+            {
+                if (argv[i][0] == L'-' || argv[i][0] == L'/')
+                {
+                    if (CSTR_EQUAL == ::CompareStringW(LOCALE_INVARIANT, NORM_IGNORECASE, &argv[i][1], -1, L"lang", -1))
+                    {
+                        if (i + 1 >= argc)
+                        {
+                            hr = E_INVALIDARG;
+                            BalExitOnFailure(hr, "Must specify a language.");
+                        }
+
+                        ++i;
+
+                        hr = StrAllocString(psczLanguage, &argv[i][0], 0);
+                        BalExitOnFailure(hr, "Failed to copy language.");
+                    }
+                }
+                else if (CSTR_EQUAL == ::CompareStringW(LOCALE_INVARIANT, NORM_IGNORECASE, &argv[i][1], -1, L"cache", -1))
+                {
+                    m_plannedAction = BOOTSTRAPPER_ACTION_CACHE;
+                }
+                else if (m_sdOverridableVariables)
+                {
+                    const wchar_t* pwc = wcschr(argv[i], L'=');
+                    if (pwc)
+                    {
+                        hr = StrAllocString(&sczVariableName, argv[i], pwc - argv[i]);
+                        BalExitOnFailure(hr, "Failed to copy variable name.");
+
+                        hr = DictKeyExists(m_sdOverridableVariables, sczVariableName);
+                        if (E_NOTFOUND == hr)
+                        {
+                            BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Ignoring attempt to set non-overridable variable: '%ls'.", sczVariableName);
+                            hr = S_OK;
+                            continue;
+                        }
+                        ExitOnFailure(hr, "Failed to check the dictionary of overridable variables.");
+
+                        hr = StrAllocString(&sczVariableValue, ++pwc, 0);
+                        BalExitOnFailure(hr, "Failed to copy variable value.");
+
+                        hr = m_pEngine->SetVariableString(sczVariableName, sczVariableValue, FALSE);
+                        BalExitOnFailure(hr, "Failed to set variable.");
+                    }
+                    else
+                    {
+                        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Ignoring unknown argument: %ls", argv[i]);
+                    }
+                }
+            }
+        }
+
+    LExit:
+        if (argv)
+        {
+            AppFreeCommandLineArgs(argv);
+        }
+
+        ReleaseStr(sczVariableName);
+        ReleaseStr(sczVariableValue);
+
+        return hr;
+    }
+
+    HRESULT LoadLocalization(
+        __in_z LPCWSTR wzModulePath,
+        __in_z_opt LPCWSTR wzLanguage
+        )
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczLocPath = NULL;
+        LPWSTR sczFormatted = NULL;
+        LPCWSTR wzLocFileName = m_fPrereq ? L"mbapreq.wxl" : L"thm.wxl";
+
+        // Find and load .wxl file.
+        hr = LocProbeForFile(wzModulePath, wzLocFileName, wzLanguage, &sczLocPath);
+        BalExitOnFailure(hr, "Failed to probe for loc file: %ls in path: %ls", wzLocFileName, wzModulePath);
+
+        hr = LocLoadFromFile(sczLocPath, &m_pWixLoc);
+        BalExitOnFailure(hr, "Failed to load loc file from path: %ls", sczLocPath);
+
+        // Set WixStdBALanguageId to .wxl language id.
+        if (WIX_LOCALIZATION_LANGUAGE_NOT_SET != m_pWixLoc->dwLangId)
+        {
+            ::SetThreadLocale(m_pWixLoc->dwLangId);
+
+            hr = m_pEngine->SetVariableNumeric(WIXSTDBA_VARIABLE_LANGUAGE_ID, m_pWixLoc->dwLangId);
+            BalExitOnFailure(hr, "Failed to set WixStdBALanguageId variable.");
+        }
+
+        // Load ConfirmCancelMessage.
+        hr = StrAllocString(&m_sczConfirmCloseMessage, L"#(loc.ConfirmCancelMessage)", 0);
+        ExitOnFailure(hr, "Failed to initialize confirm message loc identifier.");
+
+        hr = LocLocalizeString(m_pWixLoc, &m_sczConfirmCloseMessage);
+        BalExitOnFailure(hr, "Failed to localize confirm close message: %ls", m_sczConfirmCloseMessage);
+
+        hr = BalFormatString(m_sczConfirmCloseMessage, &sczFormatted);
+        if (SUCCEEDED(hr))
+        {
+            ReleaseStr(m_sczConfirmCloseMessage);
+            m_sczConfirmCloseMessage = sczFormatted;
+            sczFormatted = NULL;
+        }
+
+    LExit:
+        ReleaseStr(sczFormatted);
+        ReleaseStr(sczLocPath);
+
+        return hr;
+    }
+
+
+    HRESULT LoadTheme(
+        __in_z LPCWSTR wzModulePath,
+        __in_z_opt LPCWSTR wzLanguage
+        )
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczThemePath = NULL;
+        LPCWSTR wzThemeFileName = m_fPrereq ? L"mbapreq.thm" : L"thm.xml";
+
+        hr = LocProbeForFile(wzModulePath, wzThemeFileName, wzLanguage, &sczThemePath);
+        BalExitOnFailure(hr, "Failed to probe for theme file: %ls in path: %ls", wzThemeFileName, wzModulePath);
+
+        hr = ThemeLoadFromFile(sczThemePath, &m_pTheme);
+        BalExitOnFailure(hr, "Failed to load theme from path: %ls", sczThemePath);
+
+        hr = ThemeRegisterVariableCallbacks(m_pTheme, EvaluateVariableConditionCallback, FormatVariableStringCallback, GetVariableNumericCallback, SetVariableNumericCallback, GetVariableStringCallback, SetVariableStringCallback, NULL);
+        BalExitOnFailure(hr, "Failed to register variable theme callbacks.");
+
+        hr = ThemeLocalize(m_pTheme, m_pWixLoc);
+        BalExitOnFailure(hr, "Failed to localize theme: %ls", sczThemePath);
+
+    LExit:
+        ReleaseStr(sczThemePath);
+
+        return hr;
+    }
+
+
+    HRESULT ParseOverridableVariablesFromXml(
+        __in IXMLDOMDocument* pixdManifest
+        )
+    {
+        HRESULT hr = S_OK;
+        IXMLDOMNode* pNode = NULL;
+        IXMLDOMNodeList* pNodes = NULL;
+        DWORD cNodes = 0;
+        LPWSTR scz = NULL;
+
+        // Get the list of variables users can override on the command line.
+        hr = XmlSelectNodes(pixdManifest, L"/BootstrapperApplicationData/WixStdbaOverridableVariable", &pNodes);
+        if (S_FALSE == hr)
+        {
+            ExitFunction1(hr = S_OK);
+        }
+        ExitOnFailure(hr, "Failed to select overridable variable nodes.");
+
+        hr = pNodes->get_length((long*)&cNodes);
+        ExitOnFailure(hr, "Failed to get overridable variable node count.");
+
+        if (cNodes)
+        {
+            hr = DictCreateStringList(&m_sdOverridableVariables, 32, DICT_FLAG_NONE);
+            ExitOnFailure(hr, "Failed to create the string dictionary.");
+
+            for (DWORD i = 0; i < cNodes; ++i)
+            {
+                hr = XmlNextElement(pNodes, &pNode, NULL);
+                ExitOnFailure(hr, "Failed to get next node.");
+
+                // @Name
+                hr = XmlGetAttributeEx(pNode, L"Name", &scz);
+                ExitOnFailure(hr, "Failed to get @Name.");
+
+                hr = DictAddKey(m_sdOverridableVariables, scz);
+                ExitOnFailure(hr, "Failed to add \"%ls\" to the string dictionary.", scz);
+
+                // prepare next iteration
+                ReleaseNullObject(pNode);
+            }
+        }
+
+    LExit:
+        ReleaseObject(pNode);
+        ReleaseObject(pNodes);
+        ReleaseStr(scz);
+        return hr;
+    }
+
+
+    HRESULT InitializePackageInfo()
+    {
+        HRESULT hr = S_OK;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+        {
+            pPackage = &m_Bundle.packages.rgPackages[i];
+
+            hr = InitializePackageInfoForPackage(pPackage);
+            BalExitOnFailure(hr, "Failed to initialize wixstdba package info for package: %ls.", pPackage->sczId);
+        }
+
+    LExit:
+        return hr;
+    }
+
+
+    HRESULT InitializePackageInfoForPackage(
+        __in BAL_INFO_PACKAGE* pPackage
+        )
+    {
+        HRESULT hr = S_OK;
+
+        pPackage->pvCustomData = MemAlloc(sizeof(WIXSTDBA_PACKAGE_INFO), TRUE);
+        BalExitOnNull(pPackage->pvCustomData, hr, E_OUTOFMEMORY, "Failed to allocate memory for wixstdba package info.");
+
+    LExit:
+        return hr;
+    }
+
+
+    HRESULT InitializePrerequisiteInformation()
+    {
+        HRESULT hr = S_OK;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+        {
+            pPackage = &m_Bundle.packages.rgPackages[i];
+            if (!pPackage->fPrereqPackage)
+            {
+                continue;
+            }
+
+            if (pPackage->sczPrereqLicenseFile)
+            {
+                if (m_sczLicenseFile)
+                {
+                    hr = HRESULT_FROM_WIN32(ERROR_INVALID_DATA);
+                    BalExitOnFailure(hr, "More than one license file specified in prerequisite info.");
+                }
+
+                hr = StrAllocString(&m_sczLicenseFile, pPackage->sczPrereqLicenseFile, 0);
+                BalExitOnFailure(hr, "Failed to copy license file location from prereq package.");
+            }
+
+            if (pPackage->sczPrereqLicenseUrl)
+            {
+                if (m_sczLicenseUrl)
+                {
+                    hr = HRESULT_FROM_WIN32(ERROR_INVALID_DATA);
+                    BalExitOnFailure(hr, "More than one license URL specified in prerequisite info.");
+                }
+
+                hr = StrAllocString(&m_sczLicenseUrl, pPackage->sczPrereqLicenseUrl, 0);
+                BalExitOnFailure(hr, "Failed to copy license URL from prereq package.");
+            }
+        }
+
+    LExit:
+        return hr;
+    }
+
+
+    HRESULT ParseBootstrapperApplicationDataFromXml(
+        __in IXMLDOMDocument* pixdManifest
+        )
+    {
+        HRESULT hr = S_OK;
+        IXMLDOMNode* pNode = NULL;
+        DWORD dwBool = 0;
+
+        hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixStdbaInformation", &pNode);
+        if (S_FALSE == hr)
+        {
+            hr = E_INVALIDARG;
+        }
+        BalExitOnFailure(hr, "BootstrapperApplication.xml manifest is missing wixstdba information.");
+
+        hr = XmlGetAttributeEx(pNode, L"LicenseFile", &m_sczLicenseFile);
+        if (E_NOTFOUND == hr)
+        {
+            hr = S_OK;
+        }
+        BalExitOnFailure(hr, "Failed to get license file.");
+
+        hr = XmlGetAttributeEx(pNode, L"LicenseUrl", &m_sczLicenseUrl);
+        if (E_NOTFOUND == hr)
+        {
+            hr = S_OK;
+        }
+        BalExitOnFailure(hr, "Failed to get license URL.");
+
+        ReleaseObject(pNode);
+
+        hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixStdbaOptions", &pNode);
+        if (S_FALSE == hr)
+        {
+            ExitFunction1(hr = S_OK);
+        }
+        BalExitOnFailure(hr, "Failed to read wixstdba options from BootstrapperApplication.xml manifest.");
+
+        hr = XmlGetAttributeNumber(pNode, L"SuppressOptionsUI", &dwBool);
+        if (S_FALSE == hr)
+        {
+            hr = S_OK;
+        }
+        else if (SUCCEEDED(hr) && dwBool)
+        {
+            hr = BalSetNumericVariable(WIXSTDBA_VARIABLE_SUPPRESS_OPTIONS_UI, 1);
+            BalExitOnFailure(hr, "Failed to set '%ls' variable.", WIXSTDBA_VARIABLE_SUPPRESS_OPTIONS_UI);
+        }
+        BalExitOnFailure(hr, "Failed to get SuppressOptionsUI value.");
+
+        dwBool = 0;
+        hr = XmlGetAttributeNumber(pNode, L"SuppressDowngradeFailure", &dwBool);
+        if (S_FALSE == hr)
+        {
+            hr = S_OK;
+        }
+        else if (SUCCEEDED(hr))
+        {
+            m_fSuppressDowngradeFailure = 0 < dwBool;
+        }
+        BalExitOnFailure(hr, "Failed to get SuppressDowngradeFailure value.");
+
+        dwBool = 0;
+        hr = XmlGetAttributeNumber(pNode, L"SuppressRepair", &dwBool);
+        if (S_FALSE == hr)
+        {
+            hr = S_OK;
+        }
+        else if (SUCCEEDED(hr))
+        {
+            m_fSuppressRepair = 0 < dwBool;
+        }
+        BalExitOnFailure(hr, "Failed to get SuppressRepair value.");
+
+        hr = XmlGetAttributeNumber(pNode, L"ShowVersion", &dwBool);
+        if (S_FALSE == hr)
+        {
+            hr = S_OK;
+        }
+        else if (SUCCEEDED(hr) && dwBool)
+        {
+            hr = BalSetNumericVariable(WIXSTDBA_VARIABLE_SHOW_VERSION, 1);
+            BalExitOnFailure(hr, "Failed to set '%ls' variable.", WIXSTDBA_VARIABLE_SHOW_VERSION);
+        }
+        BalExitOnFailure(hr, "Failed to get ShowVersion value.");
+
+        hr = XmlGetAttributeNumber(pNode, L"SupportCacheOnly", &dwBool);
+        if (S_FALSE == hr)
+        {
+            hr = S_OK;
+        }
+        else if (SUCCEEDED(hr))
+        {
+            m_fSupportCacheOnly = 0 < dwBool;
+        }
+        BalExitOnFailure(hr, "Failed to get SupportCacheOnly value.");
+
+    LExit:
+        ReleaseObject(pNode);
+        return hr;
+    }
+
+    HRESULT GetPackageInfo(
+        __in_z LPCWSTR wzPackageId,
+        __out WIXSTDBA_PACKAGE_INFO** ppPackageInfo,
+        __out BAL_INFO_PACKAGE** ppPackage
+        )
+    {
+        HRESULT hr = E_NOTFOUND;
+        WIXSTDBA_PACKAGE_INFO* pPackageInfo = NULL;
+        BAL_INFO_PACKAGE* pPackage = NULL;
+
+        Assert(wzPackageId && *wzPackageId);
+        Assert(ppPackage);
+        Assert(ppPackageInfo);
+
+        hr = BalInfoFindPackageById(&m_Bundle.packages, wzPackageId, &pPackage);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed trying to find the requested package.");
+
+            pPackageInfo = reinterpret_cast<WIXSTDBA_PACKAGE_INFO*>(pPackage->pvCustomData);
+        }
+
+        *ppPackageInfo = pPackageInfo;
+        *ppPackage = pPackage;
+
+    LExit:
+        return hr;
+    }
+
+
+    //
+    // Get the file version of the bootstrapper and record in bootstrapper log file
+    //
+    HRESULT GetBundleFileVersion()
+    {
+        HRESULT hr = S_OK;
+        ULARGE_INTEGER uliVersion = { };
+        LPWSTR sczCurrentPath = NULL;
+        VERUTIL_VERSION* pVersion = NULL;
+
+        hr = PathForCurrentProcess(&sczCurrentPath, NULL);
+        BalExitOnFailure(hr, "Failed to get bundle path.");
+
+        hr = FileVersion(sczCurrentPath, &uliVersion.HighPart, &uliVersion.LowPart);
+        BalExitOnFailure(hr, "Failed to get bundle file version.");
+
+        hr = VerVersionFromQword(uliVersion.QuadPart, &pVersion);
+        BalExitOnFailure(hr, "Failed to create bundle file version.");
+
+        hr = m_pEngine->SetVariableVersion(WIXSTDBA_VARIABLE_BUNDLE_FILE_VERSION, pVersion->sczVersion);
+        BalExitOnFailure(hr, "Failed to set WixBundleFileVersion variable.");
+
+    LExit:
+        ReleaseVerutilVersion(pVersion);
+        ReleaseStr(sczCurrentPath);
+
+        return hr;
+    }
+
+
+    //
+    // CreateMainWindow - creates the main install window.
+    //
+    HRESULT CreateMainWindow()
+    {
+        HRESULT hr = S_OK;
+        HICON hIcon = reinterpret_cast<HICON>(m_pTheme->hIcon);
+        WNDCLASSW wc = { };
+        DWORD dwWindowStyle = 0;
+        int x = CW_USEDEFAULT;
+        int y = CW_USEDEFAULT;
+        POINT ptCursor = { };
+
+        // If the theme did not provide an icon, try using the icon from the bundle engine.
+        if (!hIcon)
+        {
+            HMODULE hBootstrapperEngine = ::GetModuleHandleW(NULL);
+            if (hBootstrapperEngine)
+            {
+                hIcon = ::LoadIconW(hBootstrapperEngine, MAKEINTRESOURCEW(1));
+            }
+        }
+
+        // Register the window class and create the window.
+        wc.lpfnWndProc = CWixStandardBootstrapperApplication::WndProc;
+        wc.hInstance = m_hModule;
+        wc.hIcon = hIcon;
+        wc.hCursor = ::LoadCursorW(NULL, (LPCWSTR)IDC_ARROW);
+        wc.hbrBackground = m_pTheme->rgFonts[m_pTheme->dwFontId].hBackground;
+        wc.lpszMenuName = NULL;
+        wc.lpszClassName = WIXSTDBA_WINDOW_CLASS;
+        if (!::RegisterClassW(&wc))
+        {
+            ExitWithLastError(hr, "Failed to register window.");
+        }
+
+        m_fRegistered = TRUE;
+
+        // Calculate the window style based on the theme style and command display value.
+        dwWindowStyle = m_pTheme->dwStyle;
+        if (BOOTSTRAPPER_DISPLAY_NONE >= m_command.display)
+        {
+            dwWindowStyle &= ~WS_VISIBLE;
+        }
+
+        // Don't show the window if there is a splash screen (it will be made visible when the splash screen is hidden)
+        if (::IsWindow(m_command.hwndSplashScreen))
+        {
+            dwWindowStyle &= ~WS_VISIBLE;
+        }
+
+        // Center the window on the monitor with the mouse.
+        if (::GetCursorPos(&ptCursor))
+        {
+            x = ptCursor.x;
+            y = ptCursor.y;
+        }
+
+        hr = ThemeCreateParentWindow(m_pTheme, 0, wc.lpszClassName, m_pTheme->sczCaption, dwWindowStyle, x, y, HWND_DESKTOP, m_hModule, this, THEME_WINDOW_INITIAL_POSITION_CENTER_MONITOR_FROM_COORDINATES, &m_hWnd);
+        ExitOnFailure(hr, "Failed to create window.");
+
+        hr = S_OK;
+
+    LExit:
+        return hr;
+    }
+
+
+    //
+    // InitializeTaskbarButton - initializes taskbar button for progress.
+    //
+    void InitializeTaskbarButton()
+    {
+        HRESULT hr = S_OK;
+
+        hr = ::CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_ALL, __uuidof(ITaskbarList3), reinterpret_cast<LPVOID*>(&m_pTaskbarList));
+        if (REGDB_E_CLASSNOTREG == hr) // not supported before Windows 7
+        {
+            ExitFunction1(hr = S_OK);
+        }
+        BalExitOnFailure(hr, "Failed to create ITaskbarList3. Continuing.");
+
+        m_uTaskbarButtonCreatedMessage = ::RegisterWindowMessageW(L"TaskbarButtonCreated");
+        BalExitOnNullWithLastError(m_uTaskbarButtonCreatedMessage, hr, "Failed to get TaskbarButtonCreated message. Continuing.");
+
+    LExit:
+        return;
+    }
+
+    //
+    // DestroyMainWindow - clean up all the window registration.
+    //
+    void DestroyMainWindow()
+    {
+        if (::IsWindow(m_hWnd))
+        {
+            ::DestroyWindow(m_hWnd);
+            m_hWnd = NULL;
+            m_fTaskbarButtonOK = FALSE;
+        }
+
+        if (m_fRegistered)
+        {
+            ::UnregisterClassW(WIXSTDBA_WINDOW_CLASS, m_hModule);
+            m_fRegistered = FALSE;
+        }
+    }
+
+
+    //
+    // UninitializeTaskbarButton - clean up the taskbar registration.
+    //
+    void UninitializeTaskbarButton()
+    {
+        m_fTaskbarButtonOK = FALSE;
+        ReleaseNullObject(m_pTaskbarList);
+    }
+
+
+    static LRESULT CallDefaultWndProc(
+        __in CWixStandardBootstrapperApplication* pBA,
+        __in HWND hWnd,
+        __in UINT uMsg,
+        __in WPARAM wParam,
+        __in LPARAM lParam
+        )
+    {
+        LRESULT lres = NULL;
+        THEME* pTheme = NULL;
+        HRESULT hr = S_OK;
+        BA_FUNCTIONS_WNDPROC_ARGS wndProcArgs = { };
+        BA_FUNCTIONS_WNDPROC_RESULTS wndProcResults = { };
+
+        if (pBA)
+        {
+            pTheme = pBA->m_pTheme;
+
+            if (pBA->m_pfnBAFunctionsProc)
+            {
+                wndProcArgs.cbSize = sizeof(wndProcArgs);
+                wndProcArgs.pTheme = pTheme;
+                wndProcArgs.hWnd = hWnd;
+                wndProcArgs.uMsg = uMsg;
+                wndProcArgs.wParam = wParam;
+                wndProcArgs.lParam = lParam;
+                wndProcResults.cbSize = sizeof(wndProcResults);
+
+                hr = pBA->m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_WNDPROC, &wndProcArgs, &wndProcResults, pBA->m_pvBAFunctionsProcContext);
+                if (E_NOTIMPL != hr)
+                {
+                    lres = wndProcResults.lres;
+                    ExitFunction();
+                }
+            }
+        }
+
+        lres = ThemeDefWindowProc(pTheme, hWnd, uMsg, wParam, lParam);
+
+    LExit:
+        return lres;
+    }
+
+    //
+    // WndProc - standard windows message handler.
+    //
+    static LRESULT CALLBACK WndProc(
+        __in HWND hWnd,
+        __in UINT uMsg,
+        __in WPARAM wParam,
+        __in LPARAM lParam
+        )
+    {
+#pragma warning(suppress:4312)
+        CWixStandardBootstrapperApplication* pBA = reinterpret_cast<CWixStandardBootstrapperApplication*>(::GetWindowLongPtrW(hWnd, GWLP_USERDATA));
+        BOOL fCancel = FALSE;
+
+        switch (uMsg)
+        {
+        case WM_NCCREATE:
+            {
+            LPCREATESTRUCT lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
+            pBA = reinterpret_cast<CWixStandardBootstrapperApplication*>(lpcs->lpCreateParams);
+#pragma warning(suppress:4244)
+            ::SetWindowLongPtrW(hWnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(pBA));
+            }
+            break;
+
+        case WM_NCDESTROY:
+            {
+            LRESULT lres = CallDefaultWndProc(pBA, hWnd, uMsg, wParam, lParam);
+            ::SetWindowLongPtrW(hWnd, GWLP_USERDATA, 0);
+            ::PostQuitMessage(0);
+            return lres;
+            }
+
+        case WM_CREATE:
+            if (!pBA->OnCreate(hWnd))
+            {
+                return -1;
+            }
+            break;
+
+        case WM_QUERYENDSESSION:
+            fCancel = true;
+            pBA->OnSystemShutdown(static_cast<DWORD>(lParam), &fCancel);
+            return !fCancel;
+
+        case WM_CLOSE:
+            // If the user chose not to close, do *not* let the default window proc handle the message.
+            if (!pBA->OnClose())
+            {
+                return 0;
+            }
+            break;
+
+        case WM_WIXSTDBA_SHOW_HELP:
+            pBA->OnShowHelp();
+            return 0;
+
+        case WM_WIXSTDBA_DETECT_PACKAGES:
+            pBA->OnDetect();
+            return 0;
+
+        case WM_WIXSTDBA_PLAN_PACKAGES:
+            pBA->OnPlan(static_cast<BOOTSTRAPPER_ACTION>(lParam));
+            return 0;
+
+        case WM_WIXSTDBA_APPLY_PACKAGES:
+            pBA->OnApply();
+            return 0;
+
+        case WM_WIXSTDBA_CHANGE_STATE:
+            pBA->OnChangeState(static_cast<WIXSTDBA_STATE>(lParam));
+            return 0;
+
+        case WM_WIXSTDBA_SHOW_FAILURE:
+            pBA->OnShowFailure();
+            return 0;
+
+        case WM_COMMAND:
+            switch (HIWORD(wParam))
+            {
+            case BN_CLICKED:
+                switch (LOWORD(wParam))
+                {
+                case WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX:
+                    pBA->OnClickAcceptCheckbox();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_INSTALL_BUTTON:
+                    pBA->OnClickInstallButton();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_REPAIR_BUTTON:
+                    pBA->OnClickRepairButton();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_UNINSTALL_BUTTON:
+                    pBA->OnClickUninstallButton();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_LAUNCH_BUTTON:
+                    pBA->OnClickLaunchButton();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_SUCCESS_RESTART_BUTTON: __fallthrough;
+                case WIXSTDBA_CONTROL_FAILURE_RESTART_BUTTON:
+                    pBA->OnClickRestartButton();
+                    return 0;
+
+                case WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON:
+                    pBA->OnClickCloseButton();
+                    return 0;
+                }
+                break;
+            }
+            break;
+
+        case WM_NOTIFY:
+            if (lParam)
+            {
+                LPNMHDR pnmhdr = reinterpret_cast<LPNMHDR>(lParam);
+                switch (pnmhdr->code)
+                {
+                case NM_CLICK: __fallthrough;
+                case NM_RETURN:
+                    switch (static_cast<DWORD>(pnmhdr->idFrom))
+                    {
+                    case WIXSTDBA_CONTROL_EULA_LINK:
+                        pBA->OnClickEulaLink();
+                        return 1;
+                    case WIXSTDBA_CONTROL_FAILURE_LOGFILE_LINK:
+                        pBA->OnClickLogFileLink();
+                        return 1;
+                    }
+                }
+            }
+            break;
+        }
+
+        if (pBA && pBA->m_pTaskbarList && uMsg == pBA->m_uTaskbarButtonCreatedMessage)
+        {
+            pBA->m_fTaskbarButtonOK = TRUE;
+            return 0;
+        }
+
+        return CallDefaultWndProc(pBA, hWnd, uMsg, wParam, lParam);
+    }
+
+
+    //
+    // OnCreate - finishes loading the theme.
+    //
+    BOOL OnCreate(
+        __in HWND /*hWnd*/
+        )
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczLicenseFormatted = NULL;
+        LPWSTR sczLicensePath = NULL;
+        LPWSTR sczLicenseDirectory = NULL;
+        LPWSTR sczLicenseFilename = NULL;
+        BA_FUNCTIONS_ONTHEMELOADED_ARGS themeLoadedArgs = { };
+        BA_FUNCTIONS_ONTHEMELOADED_RESULTS themeLoadedResults = { };
+
+        hr = ThemeLoadControls(m_pTheme, vrgInitControls, countof(vrgInitControls));
+        BalExitOnFailure(hr, "Failed to load theme controls.");
+
+        C_ASSERT(COUNT_WIXSTDBA_PAGE == countof(vrgwzPageNames));
+        C_ASSERT(countof(m_rgdwPageIds) == countof(vrgwzPageNames));
+
+        ThemeGetPageIds(m_pTheme, vrgwzPageNames, m_rgdwPageIds, countof(m_rgdwPageIds));
+
+        // Load the RTF EULA control with text if the control exists.
+        if (ThemeControlExists(m_pTheme, WIXSTDBA_CONTROL_EULA_RICHEDIT))
+        {
+            hr = (m_sczLicenseFile && *m_sczLicenseFile) ? S_OK : E_INVALIDDATA;
+            if (SUCCEEDED(hr))
+            {
+                hr = StrAllocString(&sczLicenseFormatted, m_sczLicenseFile, 0);
+                if (SUCCEEDED(hr))
+                {
+                    hr = LocLocalizeString(m_pWixLoc, &sczLicenseFormatted);
+                    if (SUCCEEDED(hr))
+                    {
+                        // Assume there is no hidden variables to be formatted
+                        // so don't worry about securely freeing it.
+                        hr = BalFormatString(sczLicenseFormatted, &sczLicenseFormatted);
+                        if (SUCCEEDED(hr))
+                        {
+                            hr = PathRelativeToModule(&sczLicensePath, sczLicenseFormatted, m_hModule);
+                            if (SUCCEEDED(hr))
+                            {
+                                hr = PathGetDirectory(sczLicensePath, &sczLicenseDirectory);
+                                if (SUCCEEDED(hr))
+                                {
+                                    hr = StrAllocString(&sczLicenseFilename, PathFile(sczLicenseFormatted), 0);
+                                    if (SUCCEEDED(hr))
+                                    {
+                                        hr = LocProbeForFile(sczLicenseDirectory, sczLicenseFilename, m_sczLanguage, &sczLicensePath);
+                                        if (SUCCEEDED(hr))
+                                        {
+                                            hr = ThemeLoadRichEditFromFile(m_pTheme, WIXSTDBA_CONTROL_EULA_RICHEDIT, sczLicensePath, m_hModule);
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            if (FAILED(hr))
+            {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Failed to load file into license richedit control from path '%ls' manifest value: %ls", sczLicensePath, m_sczLicenseFile);
+                hr = S_OK;
+            }
+        }
+
+        if (m_pfnBAFunctionsProc)
+        {
+            themeLoadedArgs.cbSize = sizeof(themeLoadedArgs);
+            themeLoadedArgs.pTheme = m_pTheme;
+            themeLoadedArgs.pWixLoc = m_pWixLoc;
+            themeLoadedResults.cbSize = sizeof(themeLoadedResults);
+            hr = m_pfnBAFunctionsProc(BA_FUNCTIONS_MESSAGE_ONTHEMELOADED, &themeLoadedArgs, &themeLoadedResults, m_pvBAFunctionsProcContext);
+            BalExitOnFailure(hr, "BAFunctions OnThemeLoaded failed.");
+        }
+
+    LExit:
+        ReleaseStr(sczLicenseFilename);
+        ReleaseStr(sczLicenseDirectory);
+        ReleaseStr(sczLicensePath);
+        ReleaseStr(sczLicenseFormatted);
+
+        return SUCCEEDED(hr);
+    }
+
+
+    //
+    // OnShowFailure - display the failure page.
+    //
+    void OnShowFailure()
+    {
+        SetState(WIXSTDBA_STATE_FAILED, S_OK);
+
+        // If the UI should be visible, display it now and hide the splash screen
+        if (BOOTSTRAPPER_DISPLAY_NONE < m_command.display)
+        {
+            ::ShowWindow(m_pTheme->hwndParent, SW_SHOW);
+        }
+
+        m_pEngine->CloseSplashScreen();
+
+        return;
+    }
+
+
+    //
+    // OnShowHelp - display the help page.
+    //
+    void OnShowHelp()
+    {
+        SetState(WIXSTDBA_STATE_HELP, S_OK);
+
+        // If the UI should be visible, display it now and hide the splash screen
+        if (BOOTSTRAPPER_DISPLAY_NONE < m_command.display)
+        {
+            ::ShowWindow(m_pTheme->hwndParent, SW_SHOW);
+        }
+
+        m_pEngine->CloseSplashScreen();
+
+        return;
+    }
+
+
+    //
+    // OnDetect - start the processing of packages.
+    //
+    void OnDetect()
+    {
+        HRESULT hr = S_OK;
+
+        SetState(WIXSTDBA_STATE_DETECTING, hr);
+
+        // If the UI should be visible, display it now and hide the splash screen
+        if (BOOTSTRAPPER_DISPLAY_NONE < m_command.display)
+        {
+            ::ShowWindow(m_pTheme->hwndParent, SW_SHOW);
+        }
+
+        m_pEngine->CloseSplashScreen();
+
+        // Tell the core we're ready for the packages to be processed now.
+        hr = m_pEngine->Detect();
+        BalExitOnFailure(hr, "Failed to start detecting chain.");
+
+    LExit:
+        if (FAILED(hr))
+        {
+            SetState(WIXSTDBA_STATE_DETECTING, hr);
+        }
+
+        return;
+    }
+
+
+    //
+    // OnPlan - plan the detected changes.
+    //
+    void OnPlan(
+        __in BOOTSTRAPPER_ACTION action
+        )
+    {
+        HRESULT hr = S_OK;
+
+        m_plannedAction = action;
+
+        // If we are going to apply a downgrade, bail.
+        if (m_fDowngrading && BOOTSTRAPPER_ACTION_UNINSTALL < action)
+        {
+            if (m_fSuppressDowngradeFailure)
+            {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "A newer version of this product is installed but downgrade failure has been suppressed; continuing...");
+            }
+            else
+            {
+                hr = HRESULT_FROM_WIN32(ERROR_PRODUCT_VERSION);
+                BalExitOnFailure(hr, "Cannot install a product when a newer version is installed.");
+            }
+        }
+
+        SetState(WIXSTDBA_STATE_PLANNING, hr);
+
+        hr = m_pEngine->Plan(action);
+        BalExitOnFailure(hr, "Failed to start planning packages.");
+
+    LExit:
+        if (FAILED(hr))
+        {
+            SetState(WIXSTDBA_STATE_PLANNING, hr);
+        }
+
+        return;
+    }
+
+
+    //
+    // OnApply - apply the packages.
+    //
+    void OnApply()
+    {
+        HRESULT hr = S_OK;
+
+        SetState(WIXSTDBA_STATE_APPLYING, hr);
+        SetProgressState(hr);
+        SetTaskbarButtonProgress(0);
+
+        hr = m_pEngine->Apply(m_hWnd);
+        BalExitOnFailure(hr, "Failed to start applying packages.");
+
+        ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON, TRUE); // ensure the cancel button is enabled before starting.
+
+    LExit:
+        if (FAILED(hr))
+        {
+            SetState(WIXSTDBA_STATE_APPLYING, hr);
+        }
+
+        return;
+    }
+
+
+    //
+    // OnChangeState - change state.
+    //
+    void OnChangeState(
+        __in WIXSTDBA_STATE state
+        )
+    {
+        WIXSTDBA_STATE stateOld = m_state;
+        DWORD dwOldPageId = 0;
+        DWORD dwNewPageId = 0;
+        LPWSTR sczText = NULL;
+        LPWSTR sczUnformattedText = NULL;
+        LPWSTR sczControlState = NULL;
+        LPWSTR sczControlName = NULL;
+
+        m_state = state;
+
+        // If our install is at the end (success or failure) and we're not showing full UI or
+        // we successfully installed the prerequisite then exit (prompt for restart if required).
+        if ((WIXSTDBA_STATE_APPLIED <= m_state && BOOTSTRAPPER_DISPLAY_FULL > m_command.display) ||
+            (WIXSTDBA_STATE_APPLIED == m_state && m_fPrereq))
+        {
+            // If a restart was required but we were not automatically allowed to
+            // accept the reboot then do the prompt.
+            if (m_fRestartRequired && !m_fAllowRestart)
+            {
+                StrAllocFromError(&sczUnformattedText, HRESULT_FROM_WIN32(ERROR_SUCCESS_REBOOT_REQUIRED), NULL);
+
+                int nResult = ::MessageBoxW(m_hWnd, sczUnformattedText ? sczUnformattedText : L"The requested operation is successful. Changes will not be effective until the system is rebooted.", m_pTheme->sczCaption, MB_ICONEXCLAMATION | MB_OKCANCEL);
+                m_fAllowRestart = (IDOK == nResult);
+            }
+
+            // Quietly exit.
+            ::PostMessageW(m_hWnd, WM_CLOSE, 0, 0);
+        }
+        else // try to change the pages.
+        {
+            DeterminePageId(stateOld, &dwOldPageId);
+            DeterminePageId(m_state, &dwNewPageId);
+
+            if (dwOldPageId != dwNewPageId)
+            {
+                // Enable disable controls per-page.
+                if (m_rgdwPageIds[WIXSTDBA_PAGE_INSTALL] == dwNewPageId) // on the "Install" page, ensure the install button is enabled/disabled correctly.
+                {
+                    LONGLONG llElevated = 0;
+                    if (m_Bundle.fPerMachine)
+                    {
+                        BalGetNumericVariable(WIXBUNDLE_VARIABLE_ELEVATED, &llElevated);
+                    }
+                    ThemeControlElevates(m_pTheme, WIXSTDBA_CONTROL_INSTALL_BUTTON, (m_Bundle.fPerMachine && !llElevated));
+
+                    // If the EULA control exists, show it only if a license URL is provided as well.
+                    if (ThemeControlExists(m_pTheme, WIXSTDBA_CONTROL_EULA_LINK))
+                    {
+                        BOOL fEulaLink = (m_sczLicenseUrl && *m_sczLicenseUrl);
+                        ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_EULA_LINK, fEulaLink);
+                        ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX, fEulaLink);
+                    }
+
+                    BOOL fAcceptedLicense = !ThemeControlExists(m_pTheme, WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX) || !ThemeControlEnabled(m_pTheme, WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX) || ThemeIsControlChecked(m_pTheme, WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX);
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_INSTALL_BUTTON, fAcceptedLicense);
+                }
+                else if (m_rgdwPageIds[WIXSTDBA_PAGE_MODIFY] == dwNewPageId)
+                {
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_REPAIR_BUTTON, !m_fSuppressRepair);
+                }
+                else if (m_rgdwPageIds[WIXSTDBA_PAGE_SUCCESS] == dwNewPageId) // on the "Success" page, check if the restart or launch button should be enabled.
+                {
+                    BOOL fShowRestartButton = FALSE;
+                    BOOL fLaunchTargetExists = FALSE;
+                    if (m_fRestartRequired)
+                    {
+                        if (BOOTSTRAPPER_RESTART_PROMPT == m_command.restart)
+                        {
+                            fShowRestartButton = TRUE;
+                        }
+                    }
+                    else if (ThemeControlExists(m_pTheme, WIXSTDBA_CONTROL_LAUNCH_BUTTON))
+                    {
+                        fLaunchTargetExists = BalVariableExists(WIXSTDBA_VARIABLE_LAUNCH_TARGET_PATH);
+                    }
+
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_LAUNCH_BUTTON, fLaunchTargetExists && BOOTSTRAPPER_ACTION_UNINSTALL < m_plannedAction);
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_SUCCESS_RESTART_BUTTON, fShowRestartButton);
+                }
+                else if (m_rgdwPageIds[WIXSTDBA_PAGE_FAILURE] == dwNewPageId) // on the "Failure" page, show error message and check if the restart button should be enabled.
+                {
+                    BOOL fShowLogLink = (m_Bundle.sczLogVariable && *m_Bundle.sczLogVariable); // if there is a log file variable then we'll assume the log file exists.
+                    BOOL fShowErrorMessage = FALSE;
+                    BOOL fShowRestartButton = FALSE;
+
+                    if (FAILED(m_hrFinal))
+                    {
+                        // If we know the failure message, use that.
+                        if (m_sczFailedMessage && *m_sczFailedMessage)
+                        {
+                            StrAllocString(&sczUnformattedText, m_sczFailedMessage, 0);
+                        }
+                        else if (E_MBAHOST_NET452_ON_WIN7RTM == m_hrFinal)
+                        {
+                            HRESULT hr = StrAllocString(&sczUnformattedText, L"#(loc.NET452WIN7RTMErrorMessage)", 0);
+                            if (FAILED(hr))
+                            {
+                                BalLogError(hr, "Failed to initialize NET452WIN7RTMErrorMessage loc identifier.");
+                            }
+                            else
+                            {
+                                hr = LocLocalizeString(m_pWixLoc, &sczUnformattedText);
+                                if (FAILED(hr))
+                                {
+                                    BalLogError(hr, "Failed to localize NET452WIN7RTMErrorMessage: %ls", sczUnformattedText);
+                                    ReleaseNullStr(sczUnformattedText);
+                                }
+                            }
+                        }
+                        else if (E_DNCHOST_SCD_RUNTIME_FAILURE == m_hrFinal)
+                        {
+                            HRESULT hr = StrAllocString(&sczUnformattedText, L"#(loc.SCDRUNTIMEFAILUREErrorMessage)", 0);
+                            if (FAILED(hr))
+                            {
+                                BalLogError(hr, "Failed to initialize SCDRUNTIMEFAILUREErrorMessage loc identifier.");
+                            }
+                            else
+                            {
+                                hr = LocLocalizeString(m_pWixLoc, &sczUnformattedText);
+                                if (FAILED(hr))
+                                {
+                                    BalLogError(hr, "Failed to localize SCDRUNTIMEFAILUREErrorMessage: %ls", sczUnformattedText);
+                                    ReleaseNullStr(sczUnformattedText);
+                                }
+                            }
+                        }
+                        else // try to get the error message from the error code.
+                        {
+                            StrAllocFromError(&sczUnformattedText, m_hrFinal, NULL);
+                            if (!sczUnformattedText || !*sczUnformattedText)
+                            {
+                                StrAllocFromError(&sczUnformattedText, E_FAIL, NULL);
+                            }
+                        }
+
+                        if (E_WIXSTDBA_CONDITION_FAILED == m_hrFinal)
+                        {
+                            if (sczUnformattedText)
+                            {
+                                StrAllocString(&sczText, sczUnformattedText, 0);
+                            }
+                        }
+                        else if (E_MBAHOST_NET452_ON_WIN7RTM == m_hrFinal)
+                        {
+                            if (sczUnformattedText)
+                            {
+                                BalFormatString(sczUnformattedText, &sczText);
+                            }
+                        }
+                        else if (E_DNCHOST_SCD_RUNTIME_FAILURE == m_hrFinal)
+                        {
+                            if (sczUnformattedText)
+                            {
+                                BalFormatString(sczUnformattedText, &sczText);
+                            }
+                        }
+                        else
+                        {
+                            StrAllocFormatted(&sczText, L"0x%08x - %ls", m_hrFinal, sczUnformattedText);
+                        }
+
+                        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_FAILURE_MESSAGE_TEXT, sczText);
+                        fShowErrorMessage = TRUE;
+                    }
+
+                    if (m_fRestartRequired)
+                    {
+                        if (BOOTSTRAPPER_RESTART_PROMPT == m_command.restart)
+                        {
+                            fShowRestartButton = TRUE;
+                        }
+                    }
+
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_FAILURE_LOGFILE_LINK, fShowLogLink);
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_FAILURE_MESSAGE_TEXT, fShowErrorMessage);
+                    ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_FAILURE_RESTART_BUTTON, fShowRestartButton);
+                }
+
+                HRESULT hr = ThemeShowPage(m_pTheme, dwOldPageId, SW_HIDE);
+                if (FAILED(hr))
+                {
+                    BalLogError(hr, "Failed to hide page: %u", dwOldPageId);
+                }
+
+                hr = ThemeShowPage(m_pTheme, dwNewPageId, SW_SHOW);
+                if (FAILED(hr))
+                {
+                    BalLogError(hr, "Failed to show page: %u", dwOldPageId);
+                }
+
+                // On the install page set the focus to the install button or the next enabled control if install is disabled.
+                if (m_rgdwPageIds[WIXSTDBA_PAGE_INSTALL] == dwNewPageId)
+                {
+                    ThemeSetFocus(m_pTheme, WIXSTDBA_CONTROL_INSTALL_BUTTON);
+                }
+            }
+        }
+
+        ReleaseStr(sczText);
+        ReleaseStr(sczUnformattedText);
+        ReleaseStr(sczControlState);
+        ReleaseStr(sczControlName);
+    }
+
+
+    //
+    // OnClose - called when the window is trying to be closed.
+    //
+    BOOL OnClose()
+    {
+        BOOL fClose = FALSE;
+        BOOL fCancel = FALSE;
+
+        // If we've already succeeded or failed or showing the help page, just close (prompts are annoying if the bootstrapper is done).
+        if (WIXSTDBA_STATE_APPLIED <= m_state || WIXSTDBA_STATE_HELP == m_state)
+        {
+            fClose = TRUE;
+        }
+        else // prompt the user or force the cancel if there is no UI.
+        {
+            ::EnterCriticalSection(&m_csShowingInternalUiThisPackage);
+            fClose = PromptCancel(
+                m_hWnd,
+                BOOTSTRAPPER_DISPLAY_FULL != m_command.display || m_fShowingInternalUiThisPackage,
+                m_sczConfirmCloseMessage ? m_sczConfirmCloseMessage : L"Are you sure you want to cancel?",
+                m_pTheme->sczCaption);
+            ::LeaveCriticalSection(&m_csShowingInternalUiThisPackage);
+
+            fCancel = fClose;
+        }
+
+        // If we're doing progress then we never close, we just cancel to let rollback occur.
+        if (WIXSTDBA_STATE_APPLYING <= m_state && WIXSTDBA_STATE_APPLIED > m_state)
+        {
+            // If we canceled, disable cancel button since clicking it again is silly.
+            if (fClose)
+            {
+                ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_PROGRESS_CANCEL_BUTTON, FALSE);
+            }
+
+            fClose = FALSE;
+        }
+
+        if (fClose)
+        {
+            DWORD dwCurrentPageId = 0;
+            DeterminePageId(m_state, &dwCurrentPageId);
+
+            // Hide the current page to let thmutil do its thing with variables.
+            ThemeShowPageEx(m_pTheme, dwCurrentPageId, SW_HIDE, fCancel ? THEME_SHOW_PAGE_REASON_CANCEL : THEME_SHOW_PAGE_REASON_DEFAULT);
+        }
+
+        return fClose;
+    }
+
+
+    //
+    // OnClickAcceptCheckbox - allow the install to continue.
+    //
+    void OnClickAcceptCheckbox()
+    {
+        BOOL fAcceptedLicense = ThemeIsControlChecked(m_pTheme, WIXSTDBA_CONTROL_EULA_ACCEPT_CHECKBOX);
+        ThemeControlEnable(m_pTheme, WIXSTDBA_CONTROL_INSTALL_BUTTON, fAcceptedLicense);
+    }
+
+
+    //
+    // OnClickInstallButton - start the install by planning the packages.
+    //
+    void OnClickInstallButton()
+    {
+        this->OnPlan(BOOTSTRAPPER_ACTION_INSTALL);
+    }
+
+
+    //
+    // OnClickRepairButton - start the repair.
+    //
+    void OnClickRepairButton()
+    {
+        this->OnPlan(BOOTSTRAPPER_ACTION_REPAIR);
+    }
+
+
+    //
+    // OnClickUninstallButton - start the uninstall.
+    //
+    void OnClickUninstallButton()
+    {
+        this->OnPlan(BOOTSTRAPPER_ACTION_UNINSTALL);
+    }
+
+
+    //
+    // OnClickCloseButton - close the application.
+    //
+    void OnClickCloseButton()
+    {
+        ::SendMessageW(m_hWnd, WM_CLOSE, 0, 0);
+    }
+
+
+    //
+    // OnClickEulaLink - show the end user license agreement.
+    //
+    void OnClickEulaLink()
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczLicenseUrl = NULL;
+        LPWSTR sczLicensePath = NULL;
+        LPWSTR sczLicenseDirectory = NULL;
+        LPWSTR sczLicenseFilename = NULL;
+        URI_PROTOCOL protocol = URI_PROTOCOL_UNKNOWN;
+
+        hr = StrAllocString(&sczLicenseUrl, m_sczLicenseUrl, 0);
+        BalExitOnFailure(hr, "Failed to copy license URL: %ls", m_sczLicenseUrl);
+
+        hr = LocLocalizeString(m_pWixLoc, &sczLicenseUrl);
+        BalExitOnFailure(hr, "Failed to localize license URL: %ls", m_sczLicenseUrl);
+
+        // Assume there is no hidden variables to be formatted
+        // so don't worry about securely freeing it.
+        hr = BalFormatString(sczLicenseUrl, &sczLicenseUrl);
+        BalExitOnFailure(hr, "Failed to get formatted license URL: %ls", m_sczLicenseUrl);
+
+        hr = UriProtocol(sczLicenseUrl, &protocol);
+        if (FAILED(hr) || URI_PROTOCOL_UNKNOWN == protocol)
+        {
+            // Probe for localized license file
+            hr = PathRelativeToModule(&sczLicensePath, sczLicenseUrl, m_hModule);
+            if (SUCCEEDED(hr))
+            {
+                hr = PathGetDirectory(sczLicensePath, &sczLicenseDirectory);
+                if (SUCCEEDED(hr))
+                {
+                    hr = LocProbeForFile(sczLicenseDirectory, PathFile(sczLicenseUrl), m_sczLanguage, &sczLicensePath);
+                }
+            }
+        }
+
+        hr = ShelExecUnelevated(sczLicensePath ? sczLicensePath : sczLicenseUrl, NULL, L"open", NULL, SW_SHOWDEFAULT);
+        BalExitOnFailure(hr, "Failed to launch URL to EULA.");
+
+    LExit:
+        ReleaseStr(sczLicensePath);
+        ReleaseStr(sczLicenseUrl);
+        ReleaseStr(sczLicenseDirectory);
+        ReleaseStr(sczLicenseFilename);
+
+        return;
+    }
+
+
+    //
+    // OnClickLaunchButton - launch the app from the success page.
+    //
+    void OnClickLaunchButton()
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczUnformattedLaunchTarget = NULL;
+        LPWSTR sczLaunchTarget = NULL;
+        LPWSTR sczLaunchTargetElevatedId = NULL;
+        LPWSTR sczUnformattedArguments = NULL;
+        LPWSTR sczArguments = NULL;
+        LPWSTR sczUnformattedLaunchFolder = NULL;
+        LPWSTR sczLaunchFolder = NULL;
+        int nCmdShow = SW_SHOWNORMAL;
+
+        hr = BalGetStringVariable(WIXSTDBA_VARIABLE_LAUNCH_TARGET_PATH, &sczUnformattedLaunchTarget);
+        BalExitOnFailure(hr, "Failed to get launch target variable '%ls'.", WIXSTDBA_VARIABLE_LAUNCH_TARGET_PATH);
+
+        hr = BalFormatString(sczUnformattedLaunchTarget, &sczLaunchTarget);
+        BalExitOnFailure(hr, "Failed to format launch target variable: %ls", sczUnformattedLaunchTarget);
+
+        if (BalVariableExists(WIXSTDBA_VARIABLE_LAUNCH_TARGET_ELEVATED_ID))
+        {
+            hr = BalGetStringVariable(WIXSTDBA_VARIABLE_LAUNCH_TARGET_ELEVATED_ID, &sczLaunchTargetElevatedId);
+            BalExitOnFailure(hr, "Failed to get launch target elevated id '%ls'.", WIXSTDBA_VARIABLE_LAUNCH_TARGET_ELEVATED_ID);
+        }
+
+        if (BalVariableExists(WIXSTDBA_VARIABLE_LAUNCH_ARGUMENTS))
+        {
+            hr = BalGetStringVariable(WIXSTDBA_VARIABLE_LAUNCH_ARGUMENTS, &sczUnformattedArguments);
+            BalExitOnFailure(hr, "Failed to get launch arguments '%ls'.", WIXSTDBA_VARIABLE_LAUNCH_ARGUMENTS);
+        }
+
+        if (BalVariableExists(WIXSTDBA_VARIABLE_LAUNCH_HIDDEN))
+        {
+            nCmdShow = SW_HIDE;
+        }
+
+        if (BalVariableExists(WIXSTDBA_VARIABLE_LAUNCH_WORK_FOLDER))
+        {
+            hr = BalGetStringVariable(WIXSTDBA_VARIABLE_LAUNCH_WORK_FOLDER, &sczUnformattedLaunchFolder);
+            BalExitOnFailure(hr, "Failed to get launch working directory variable '%ls'.", WIXSTDBA_VARIABLE_LAUNCH_WORK_FOLDER);
+        }
+
+        if (sczLaunchTargetElevatedId && !m_fTriedToLaunchElevated)
+        {
+            m_fTriedToLaunchElevated = TRUE;
+            hr = m_pEngine->LaunchApprovedExe(m_hWnd, sczLaunchTargetElevatedId, sczUnformattedArguments, 0);
+            if (FAILED(hr))
+            {
+                BalLogError(hr, "Failed to launch elevated target: %ls", sczLaunchTargetElevatedId);
+
+                //try with ShelExec next time
+                OnClickLaunchButton();
+            }
+        }
+        else
+        {
+            if (sczUnformattedArguments)
+            {
+                hr = BalFormatString(sczUnformattedArguments, &sczArguments);
+                BalExitOnFailure(hr, "Failed to format launch arguments variable: %ls", sczUnformattedArguments);
+            }
+
+            if (sczUnformattedLaunchFolder)
+            {
+                hr = BalFormatString(sczUnformattedLaunchFolder, &sczLaunchFolder);
+                BalExitOnFailure(hr, "Failed to format launch working directory variable: %ls", sczUnformattedLaunchFolder);
+            }
+
+            hr = ShelExec(sczLaunchTarget, sczArguments, L"open", sczLaunchFolder, nCmdShow, m_hWnd, NULL);
+            BalExitOnFailure(hr, "Failed to launch target: %ls", sczLaunchTarget);
+
+            ::PostMessageW(m_hWnd, WM_CLOSE, 0, 0);
+        }
+
+    LExit:
+        StrSecureZeroFreeString(sczLaunchFolder);
+        ReleaseStr(sczUnformattedLaunchFolder);
+        StrSecureZeroFreeString(sczArguments);
+        ReleaseStr(sczUnformattedArguments);
+        ReleaseStr(sczLaunchTargetElevatedId);
+        StrSecureZeroFreeString(sczLaunchTarget);
+        ReleaseStr(sczUnformattedLaunchTarget);
+
+        return;
+    }
+
+
+    //
+    // OnClickRestartButton - allows the restart and closes the app.
+    //
+    void OnClickRestartButton()
+    {
+        AssertSz(m_fRestartRequired, "Restart must be requested to be able to click on the restart button.");
+
+        m_fAllowRestart = TRUE;
+        ::SendMessageW(m_hWnd, WM_CLOSE, 0, 0);
+
+        return;
+    }
+
+
+    //
+    // OnClickLogFileLink - show the log file.
+    //
+    void OnClickLogFileLink()
+    {
+        HRESULT hr = S_OK;
+        LPWSTR sczLogFile = NULL;
+
+        hr = BalGetStringVariable(m_Bundle.sczLogVariable, &sczLogFile);
+        BalExitOnFailure(hr, "Failed to get log file variable '%ls'.", m_Bundle.sczLogVariable);
+
+        hr = ShelExecUnelevated(L"notepad.exe", sczLogFile, L"open", NULL, SW_SHOWDEFAULT);
+        BalExitOnFailure(hr, "Failed to open log file target: %ls", sczLogFile);
+
+    LExit:
+        ReleaseStr(sczLogFile);
+
+        return;
+    }
+
+
+    //
+    // SetState
+    //
+    void SetState(
+        __in WIXSTDBA_STATE state,
+        __in HRESULT hrStatus
+        )
+    {
+        if (FAILED(hrStatus))
+        {
+            m_hrFinal = hrStatus;
+        }
+
+        if (FAILED(m_hrFinal))
+        {
+            state = WIXSTDBA_STATE_FAILED;
+        }
+
+        if (m_state < state)
+        {
+            ::PostMessageW(m_hWnd, WM_WIXSTDBA_CHANGE_STATE, 0, state);
+        }
+    }
+
+
+    void DeterminePageId(
+        __in WIXSTDBA_STATE state,
+        __out DWORD* pdwPageId
+        )
+    {
+        if (BOOTSTRAPPER_DISPLAY_PASSIVE == m_command.display)
+        {
+            switch (state)
+            {
+            case WIXSTDBA_STATE_INITIALIZED:
+                *pdwPageId = BOOTSTRAPPER_ACTION_HELP == m_command.action ? m_rgdwPageIds[WIXSTDBA_PAGE_HELP] : m_rgdwPageIds[WIXSTDBA_PAGE_LOADING];
+                break;
+
+            case WIXSTDBA_STATE_HELP:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_HELP];
+                break;
+
+            case WIXSTDBA_STATE_DETECTING:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_LOADING] ? m_rgdwPageIds[WIXSTDBA_PAGE_LOADING] : m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS_PASSIVE] ? m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS_PASSIVE] : m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS];
+                break;
+
+            case WIXSTDBA_STATE_DETECTED: __fallthrough;
+            case WIXSTDBA_STATE_PLANNING: __fallthrough;
+            case WIXSTDBA_STATE_PLANNED: __fallthrough;
+            case WIXSTDBA_STATE_APPLYING: __fallthrough;
+            case WIXSTDBA_STATE_CACHING: __fallthrough;
+            case WIXSTDBA_STATE_CACHED: __fallthrough;
+            case WIXSTDBA_STATE_EXECUTING: __fallthrough;
+            case WIXSTDBA_STATE_EXECUTED:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS_PASSIVE] ? m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS_PASSIVE] : m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS];
+                break;
+
+            default:
+                *pdwPageId = 0;
+                break;
+            }
+        }
+        else if (BOOTSTRAPPER_DISPLAY_FULL == m_command.display)
+        {
+            switch (state)
+            {
+            case WIXSTDBA_STATE_INITIALIZING:
+                *pdwPageId = 0;
+                break;
+
+            case WIXSTDBA_STATE_INITIALIZED:
+                *pdwPageId = BOOTSTRAPPER_ACTION_HELP == m_command.action ? m_rgdwPageIds[WIXSTDBA_PAGE_HELP] : m_rgdwPageIds[WIXSTDBA_PAGE_LOADING];
+                break;
+
+            case WIXSTDBA_STATE_HELP:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_HELP];
+                break;
+
+            case WIXSTDBA_STATE_DETECTING:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_LOADING];
+                break;
+
+            case WIXSTDBA_STATE_DETECTED:
+                switch (m_command.action)
+                {
+                case BOOTSTRAPPER_ACTION_INSTALL:
+                    *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_INSTALL];
+                    break;
+
+                case BOOTSTRAPPER_ACTION_MODIFY: __fallthrough;
+                case BOOTSTRAPPER_ACTION_REPAIR: __fallthrough;
+                case BOOTSTRAPPER_ACTION_UNINSTALL:
+                    *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_MODIFY];
+                    break;
+                }
+                break;
+
+            case WIXSTDBA_STATE_PLANNING: __fallthrough;
+            case WIXSTDBA_STATE_PLANNED: __fallthrough;
+            case WIXSTDBA_STATE_APPLYING: __fallthrough;
+            case WIXSTDBA_STATE_CACHING: __fallthrough;
+            case WIXSTDBA_STATE_CACHED: __fallthrough;
+            case WIXSTDBA_STATE_EXECUTING: __fallthrough;
+            case WIXSTDBA_STATE_EXECUTED:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_PROGRESS];
+                break;
+
+            case WIXSTDBA_STATE_APPLIED:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_SUCCESS];
+                break;
+
+            case WIXSTDBA_STATE_FAILED:
+                *pdwPageId = m_rgdwPageIds[WIXSTDBA_PAGE_FAILURE];
+                break;
+            }
+        }
+    }
+
+
+    HRESULT EvaluateConditions()
+    {
+        HRESULT hr = S_OK;
+        BOOL fResult = FALSE;
+
+        for (DWORD i = 0; i < m_Conditions.cConditions; ++i)
+        {
+            BAL_CONDITION* pCondition = m_Conditions.rgConditions + i;
+
+            hr = BalConditionEvaluate(pCondition, m_pEngine, &fResult, &m_sczFailedMessage);
+            BalExitOnFailure(hr, "Failed to evaluate condition.");
+
+            if (!fResult)
+            {
+                hr = E_WIXSTDBA_CONDITION_FAILED;
+                BalExitOnFailure(hr, "%ls", m_sczFailedMessage);
+            }
+        }
+
+        ReleaseNullStrSecure(m_sczFailedMessage);
+
+    LExit:
+        return hr;
+    }
+
+    void UpdateCacheProgress(
+        __in DWORD dwOverallPercentage
+        )
+    {
+        WCHAR wzProgress[5] = { };
+
+        ::StringCchPrintfW(wzProgress, countof(wzProgress), L"%u%%", dwOverallPercentage);
+        ThemeSetTextControl(m_pTheme, WIXSTDBA_CONTROL_CACHE_PROGRESS_TEXT, wzProgress);
+
+        ThemeSetProgressControl(m_pTheme, WIXSTDBA_CONTROL_CACHE_PROGRESS_BAR, dwOverallPercentage);
+
+        m_dwCalculatedCacheProgress = dwOverallPercentage * WIXSTDBA_ACQUIRE_PERCENTAGE / 100;
+        ThemeSetProgressControl(m_pTheme, WIXSTDBA_CONTROL_OVERALL_CALCULATED_PROGRESS_BAR, m_dwCalculatedCacheProgress + m_dwCalculatedExecuteProgress);
+
+        SetTaskbarButtonProgress(m_dwCalculatedCacheProgress + m_dwCalculatedExecuteProgress);
+    }
+
+
+    void SetTaskbarButtonProgress(
+        __in DWORD dwOverallPercentage
+        )
+    {
+        HRESULT hr = S_OK;
+
+        if (m_fTaskbarButtonOK)
+        {
+            hr = m_pTaskbarList->SetProgressValue(m_hWnd, dwOverallPercentage, 100UL);
+            BalExitOnFailure(hr, "Failed to set taskbar button progress to: %d%%.", dwOverallPercentage);
+        }
+
+    LExit:
+        return;
+    }
+
+
+    void SetTaskbarButtonState(
+        __in TBPFLAG tbpFlags
+        )
+    {
+        HRESULT hr = S_OK;
+
+        if (m_fTaskbarButtonOK)
+        {
+            hr = m_pTaskbarList->SetProgressState(m_hWnd, tbpFlags);
+            BalExitOnFailure(hr, "Failed to set taskbar button state.", tbpFlags);
+        }
+
+    LExit:
+        return;
+    }
+
+
+    void SetProgressState(
+        __in HRESULT hrStatus
+        )
+    {
+        TBPFLAG flag = TBPF_NORMAL;
+
+        if (IsCanceled() || HRESULT_FROM_WIN32(ERROR_INSTALL_USEREXIT) == hrStatus)
+        {
+            flag = TBPF_PAUSED;
+        }
+        else if (IsRollingBack() || FAILED(hrStatus))
+        {
+            flag = TBPF_ERROR;
+        }
+
+        SetTaskbarButtonState(flag);
+    }
+
+
+    HRESULT LoadBAFunctions(
+        __in IXMLDOMDocument* pixdManifest
+        )
+    {
+        HRESULT hr = S_OK;
+        IXMLDOMNode* pBAFunctionsNode = NULL;
+        IXMLDOMNode* pPayloadNode = NULL;
+        LPWSTR sczPayloadId = NULL;
+        LPWSTR sczPayloadXPath = NULL;
+        LPWSTR sczBafName = NULL;
+        LPWSTR sczBafPath = NULL;
+        BA_FUNCTIONS_CREATE_ARGS bafCreateArgs = { };
+        BA_FUNCTIONS_CREATE_RESULTS bafCreateResults = { };
+
+        hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixBalBAFunctions", &pBAFunctionsNode);
+        BalExitOnFailure(hr, "Failed to read WixBalBAFunctions node from BootstrapperApplicationData.xml.");
+
+        if (S_FALSE == hr)
+        {
+            ExitFunction();
+        }
+
+        hr = XmlGetAttributeEx(pBAFunctionsNode, L"PayloadId", &sczPayloadId);
+        BalExitOnFailure(hr, "Failed to get BAFunctions PayloadId.");
+
+        hr = StrAllocFormatted(&sczPayloadXPath, L"/BootstrapperApplicationData/WixPayloadProperties[@Payload='%ls']", sczPayloadId);
+        BalExitOnFailure(hr, "Failed to format BAFunctions payload XPath.");
+
+        hr = XmlSelectSingleNode(pixdManifest, sczPayloadXPath, &pPayloadNode);
+        if (S_FALSE == hr)
+        {
+            hr = E_NOTFOUND;
+        }
+        BalExitOnFailure(hr, "Failed to find WixPayloadProperties node for BAFunctions PayloadId: %ls.", sczPayloadId);
+
+        hr = XmlGetAttributeEx(pPayloadNode, L"Name", &sczBafName);
+        BalExitOnFailure(hr, "Failed to get BAFunctions Name.");
+
+        hr = PathRelativeToModule(&sczBafPath, sczBafName, m_hModule);
+        BalExitOnFailure(hr, "Failed to get path to BAFunctions DLL.");
+
+        BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "WIXSTDBA: LoadBAFunctions() - BAFunctions DLL %ls", sczBafPath);
+
+        m_hBAFModule = ::LoadLibraryExW(sczBafPath, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
+        BalExitOnNullWithLastError(m_hBAFModule, hr, "WIXSTDBA: LoadBAFunctions() - Failed to load DLL %ls", sczBafPath);
+
+        PFN_BA_FUNCTIONS_CREATE pfnBAFunctionsCreate = reinterpret_cast<PFN_BA_FUNCTIONS_CREATE>(::GetProcAddress(m_hBAFModule, "BAFunctionsCreate"));
+        BalExitOnNullWithLastError(pfnBAFunctionsCreate, hr, "Failed to get BAFunctionsCreate entry-point from: %ls", sczBafPath);
+
+        bafCreateArgs.cbSize = sizeof(bafCreateArgs);
+        bafCreateArgs.qwBAFunctionsAPIVersion = MAKEQWORDVERSION(0, 0, 0, 2); // TODO: need to decide whether to keep this, and if so when to update it.
+        bafCreateArgs.pBootstrapperCreateArgs = &m_createArgs;
+
+        bafCreateResults.cbSize = sizeof(bafCreateResults);
+
+        hr = pfnBAFunctionsCreate(&bafCreateArgs, &bafCreateResults);
+        BalExitOnFailure(hr, "Failed to create BAFunctions.");
+
+        m_pfnBAFunctionsProc = bafCreateResults.pfnBAFunctionsProc;
+        m_pvBAFunctionsProcContext = bafCreateResults.pvBAFunctionsProcContext;
+
+    LExit:
+        if (m_hBAFModule && !m_pfnBAFunctionsProc)
+        {
+            ::FreeLibrary(m_hBAFModule);
+            m_hBAFModule = NULL;
+        }
+        ReleaseStr(sczBafPath);
+        ReleaseStr(sczBafName);
+        ReleaseStr(sczPayloadXPath);
+        ReleaseStr(sczPayloadId);
+        ReleaseObject(pBAFunctionsNode);
+        ReleaseObject(pPayloadNode);
+
+        return hr;
+    }
+
+
+public:
+    //
+    // Constructor - initialize member variables.
+    //
+    CWixStandardBootstrapperApplication(
+        __in HMODULE hModule,
+        __in BOOL fPrereq,
+        __in HRESULT hrHostInitialization,
+        __in IBootstrapperEngine* pEngine,
+        __in const BOOTSTRAPPER_CREATE_ARGS* pArgs
+        ) : CBalBaseBootstrapperApplication(pEngine, pArgs, 3, 3000)
+    {
+        m_hModule = hModule;
+        memcpy_s(&m_command, sizeof(m_command), pArgs->pCommand, sizeof(BOOTSTRAPPER_COMMAND));
+        memcpy_s(&m_createArgs, sizeof(m_createArgs), pArgs, sizeof(BOOTSTRAPPER_CREATE_ARGS));
+        m_createArgs.pCommand = &m_command;
+
+        if (fPrereq)
+        {
+            // Pre-req BA should only show help or do an install (to launch the Managed BA which can then do the right action).
+            if (BOOTSTRAPPER_ACTION_HELP != m_command.action)
+            {
+                m_command.action = BOOTSTRAPPER_ACTION_INSTALL;
+            }
+        }
+        else // maybe modify the action state if the bundle is or is not already installed.
+        {
+            LONGLONG llInstalled = 0;
+            HRESULT hr = BalGetNumericVariable(L"WixBundleInstalled", &llInstalled);
+            if (SUCCEEDED(hr) && BOOTSTRAPPER_RESUME_TYPE_REBOOT != m_command.resumeType && 0 < llInstalled && BOOTSTRAPPER_ACTION_INSTALL == m_command.action)
+            {
+                m_command.action = BOOTSTRAPPER_ACTION_MODIFY;
+            }
+            else if (0 == llInstalled && (BOOTSTRAPPER_ACTION_MODIFY == m_command.action || BOOTSTRAPPER_ACTION_REPAIR == m_command.action))
+            {
+                m_command.action = BOOTSTRAPPER_ACTION_INSTALL;
+            }
+        }
+
+        m_plannedAction = BOOTSTRAPPER_ACTION_UNKNOWN;
+
+        // When resuming from restart doing some install-like operation, try to find the package that forced the
+        // restart. We'll use this information during planning.
+        m_sczAfterForcedRestartPackage = NULL;
+
+        if (BOOTSTRAPPER_RESUME_TYPE_REBOOT == m_command.resumeType && BOOTSTRAPPER_ACTION_UNINSTALL < m_command.action)
+        {
+            // Ensure the forced restart package variable is null when it is an empty string.
+            HRESULT hr = BalGetStringVariable(L"WixBundleForcedRestartPackage", &m_sczAfterForcedRestartPackage);
+            if (FAILED(hr) || !m_sczAfterForcedRestartPackage || !*m_sczAfterForcedRestartPackage)
+            {
+                ReleaseNullStr(m_sczAfterForcedRestartPackage);
+            }
+        }
+
+        m_pWixLoc = NULL;
+        memset(&m_Bundle, 0, sizeof(m_Bundle));
+        memset(&m_Conditions, 0, sizeof(m_Conditions));
+        m_sczConfirmCloseMessage = NULL;
+        m_sczFailedMessage = NULL;
+
+        m_sczLanguage = NULL;
+        m_pTheme = NULL;
+        memset(m_rgdwPageIds, 0, sizeof(m_rgdwPageIds));
+        m_hUiThread = NULL;
+        m_fRegistered = FALSE;
+        m_hWnd = NULL;
+
+        m_state = WIXSTDBA_STATE_INITIALIZING;
+        m_hrFinal = hrHostInitialization;
+
+        m_fDowngrading = FALSE;
+        m_restartResult = BOOTSTRAPPER_APPLY_RESTART_NONE;
+        m_fRestartRequired = FALSE;
+        m_fAllowRestart = FALSE;
+
+        m_sczLicenseFile = NULL;
+        m_sczLicenseUrl = NULL;
+        m_fSuppressDowngradeFailure = FALSE;
+        m_fSuppressRepair = FALSE;
+        m_fSupportCacheOnly = FALSE;
+
+        m_sdOverridableVariables = NULL;
+        m_pTaskbarList = NULL;
+        m_uTaskbarButtonCreatedMessage = UINT_MAX;
+        m_fTaskbarButtonOK = FALSE;
+        ::InitializeCriticalSection(&m_csShowingInternalUiThisPackage);
+        m_fShowingInternalUiThisPackage = FALSE;
+        m_fTriedToLaunchElevated = FALSE;
+
+        m_fPrereq = fPrereq;
+        m_fPrereqInstalled = FALSE;
+        m_fPrereqAlreadyInstalled = FALSE;
+
+        pEngine->AddRef();
+        m_pEngine = pEngine;
+
+        m_hBAFModule = NULL;
+        m_pfnBAFunctionsProc = NULL;
+        m_pvBAFunctionsProcContext = NULL;
+    }
+
+
+    //
+    // Destructor - release member variables.
+    //
+    ~CWixStandardBootstrapperApplication()
+    {
+        AssertSz(!::IsWindow(m_hWnd), "Window should have been destroyed before destructor.");
+        AssertSz(!m_pTaskbarList, "Taskbar should have been released before destructor.");
+        AssertSz(!m_pTheme, "Theme should have been released before destructor.");
+
+        for (DWORD i = 0; i < m_Bundle.packages.cPackages; ++i)
+        {
+            ReleaseMem(m_Bundle.packages.rgPackages[i].pvCustomData);
+        }
+
+        ::DeleteCriticalSection(&m_csShowingInternalUiThisPackage);
+        ReleaseDict(m_sdOverridableVariables);
+        ReleaseStr(m_sczFailedMessage);
+        ReleaseStr(m_sczConfirmCloseMessage);
+        BalConditionsUninitialize(&m_Conditions);
+        BalInfoUninitialize(&m_Bundle);
+        LocFree(m_pWixLoc);
+
+        ReleaseStr(m_sczLanguage);
+        ReleaseStr(m_sczLicenseFile);
+        ReleaseStr(m_sczLicenseUrl);
+        ReleaseStr(m_sczAfterForcedRestartPackage);
+        ReleaseNullObject(m_pEngine);
+
+        if (m_hBAFModule)
+        {
+            PFN_BA_FUNCTIONS_DESTROY pfnBAFunctionsDestroy = reinterpret_cast<PFN_BA_FUNCTIONS_DESTROY>(::GetProcAddress(m_hBAFModule, "BAFunctionsDestroy"));
+            if (pfnBAFunctionsDestroy)
+            {
+                pfnBAFunctionsDestroy();
+            }
+
+            ::FreeLibrary(m_hBAFModule);
+            m_hBAFModule = NULL;
+        }
+    }
+
+private:
+    HMODULE m_hModule;
+    BOOTSTRAPPER_CREATE_ARGS m_createArgs;
+    BOOTSTRAPPER_COMMAND m_command;
+    IBootstrapperEngine* m_pEngine;
+    BOOTSTRAPPER_ACTION m_plannedAction;
+
+    LPWSTR m_sczAfterForcedRestartPackage;
+
+    WIX_LOCALIZATION* m_pWixLoc;
+    BAL_INFO_BUNDLE m_Bundle;
+    BAL_CONDITIONS m_Conditions;
+    LPWSTR m_sczFailedMessage;
+    LPWSTR m_sczConfirmCloseMessage;
+
+    LPWSTR m_sczLanguage;
+    THEME* m_pTheme;
+    DWORD m_rgdwPageIds[countof(vrgwzPageNames)];
+    HANDLE m_hUiThread;
+    BOOL m_fRegistered;
+    HWND m_hWnd;
+
+    WIXSTDBA_STATE m_state;
+    HRESULT m_hrFinal;
+
+    BOOL m_fStartedExecution;
+    DWORD m_dwCalculatedCacheProgress;
+    DWORD m_dwCalculatedExecuteProgress;
+
+    BOOL m_fDowngrading;
+    BOOTSTRAPPER_APPLY_RESTART m_restartResult;
+    BOOL m_fRestartRequired;
+    BOOL m_fAllowRestart;
+
+    LPWSTR m_sczLicenseFile;
+    LPWSTR m_sczLicenseUrl;
+    BOOL m_fSuppressDowngradeFailure;
+    BOOL m_fSuppressRepair;
+    BOOL m_fSupportCacheOnly;
+
+    STRINGDICT_HANDLE m_sdOverridableVariables;
+
+    BOOL m_fPrereq;
+    BOOL m_fPrereqInstalled;
+    BOOL m_fPrereqAlreadyInstalled;
+
+    ITaskbarList3* m_pTaskbarList;
+    UINT m_uTaskbarButtonCreatedMessage;
+    BOOL m_fTaskbarButtonOK;
+    CRITICAL_SECTION m_csShowingInternalUiThisPackage;
+    BOOL m_fShowingInternalUiThisPackage;
+    BOOL m_fTriedToLaunchElevated;
+
+    HMODULE m_hBAFModule;
+    PFN_BA_FUNCTIONS_PROC m_pfnBAFunctionsProc;
+    LPVOID m_pvBAFunctionsProcContext;
+};
+
+
+//
+// CreateBootstrapperApplication - creates a new IBootstrapperApplication object.
+//
+HRESULT CreateBootstrapperApplication(
+    __in HMODULE hModule,
+    __in BOOL fPrereq,
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults,
+    __out IBootstrapperApplication** ppApplication
+    )
+{
+    HRESULT hr = S_OK;
+    CWixStandardBootstrapperApplication* pApplication = NULL;
+
+    if (BOOTSTRAPPER_DISPLAY_UNKNOWN == pArgs->pCommand->display)
+    {
+        BalExitOnFailure(hr = E_INVALIDARG, "Engine requested Unknown display type.");
+    }
+
+    pApplication = new CWixStandardBootstrapperApplication(hModule, fPrereq, hrHostInitialization, pEngine, pArgs);
+    ExitOnNull(pApplication, hr, E_OUTOFMEMORY, "Failed to create new standard bootstrapper application object.");
+
+    pResults->pfnBootstrapperApplicationProc = BalBaseBootstrapperApplicationProc;
+    pResults->pvBootstrapperApplicationProcContext = pApplication;
+    *ppApplication = pApplication;
+    pApplication = NULL;
+
+LExit:
+    ReleaseObject(pApplication);
+    return hr;
+}
+
+
+static HRESULT DAPI EvaluateVariableConditionCallback(
+    __in_z LPCWSTR wzCondition,
+    __out BOOL* pf,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalEvaluateCondition(wzCondition, pf);
+}
+
+
+static HRESULT DAPI FormatVariableStringCallback(
+    __in_z LPCWSTR wzFormat,
+    __inout LPWSTR* psczOut,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalFormatString(wzFormat, psczOut);
+}
+
+
+static HRESULT DAPI GetVariableNumericCallback(
+    __in_z LPCWSTR wzVariable,
+    __out LONGLONG* pllValue,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalGetNumericVariable(wzVariable, pllValue);
+}
+
+
+static HRESULT DAPI SetVariableNumericCallback(
+    __in_z LPCWSTR wzVariable,
+    __in LONGLONG llValue,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalSetNumericVariable(wzVariable, llValue);
+}
+
+
+static HRESULT DAPI GetVariableStringCallback(
+    __in_z LPCWSTR wzVariable,
+    __inout LPWSTR* psczValue,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalGetStringVariable(wzVariable, psczValue);
+}
+
+
+static HRESULT DAPI SetVariableStringCallback(
+    __in_z LPCWSTR wzVariable,
+    __in_z_opt LPCWSTR wzValue,
+    __in BOOL fFormatted,
+    __in_opt LPVOID /*pvContext*/
+    )
+{
+    return BalSetStringVariable(wzVariable, wzValue, fFormatted);
+}
+
+static LPCSTR LoggingRequestStateToString(
+    __in BOOTSTRAPPER_REQUEST_STATE requestState
+    )
+{
+    switch (requestState)
+    {
+    case BOOTSTRAPPER_REQUEST_STATE_NONE:
+        return "None";
+    case BOOTSTRAPPER_REQUEST_STATE_FORCE_ABSENT:
+        return "ForceAbsent";
+    case BOOTSTRAPPER_REQUEST_STATE_ABSENT:
+        return "Absent";
+    case BOOTSTRAPPER_REQUEST_STATE_CACHE:
+        return "Cache";
+    case BOOTSTRAPPER_REQUEST_STATE_PRESENT:
+        return "Present";
+    case BOOTSTRAPPER_REQUEST_STATE_REPAIR:
+        return "Repair";
+    default:
+        return "Invalid";
+    }
+}
+
+static LPCSTR LoggingMsiFeatureStateToString(
+    __in BOOTSTRAPPER_FEATURE_STATE featureState
+    )
+{
+    switch (featureState)
+    {
+    case BOOTSTRAPPER_FEATURE_STATE_UNKNOWN:
+        return "Unknown";
+    case BOOTSTRAPPER_FEATURE_STATE_ABSENT:
+        return "Absent";
+    case BOOTSTRAPPER_FEATURE_STATE_ADVERTISED:
+        return "Advertised";
+    case BOOTSTRAPPER_FEATURE_STATE_LOCAL:
+        return "Local";
+    case BOOTSTRAPPER_FEATURE_STATE_SOURCE:
+        return "Source";
+    default:
+        return "Invalid";
+    }
+}
diff --git a/src/ext/Bal/wixstdba/packages.config b/src/ext/Bal/wixstdba/packages.config
new file mode 100644
index 00000000..071284ac
--- /dev/null
+++ b/src/ext/Bal/wixstdba/packages.config
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Build.Tasks.Git" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.Common" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Microsoft.SourceLink.GitHub" version="1.0.0" targetFramework="native" developmentDependency="true" />
+  <package id="Nerdbank.GitVersioning" version="3.3.37" targetFramework="native" developmentDependency="true" />
+  <package id="WixToolset.BalUtil" version="4.0.58" targetFramework="native" />
+  <package id="WixToolset.BootstrapperCore.Native" version="4.0.141" targetFramework="native" />
+  <package id="WixToolset.DUtil" version="4.0.72" targetFramework="native" />
+</packages>
\ No newline at end of file
diff --git a/src/ext/Bal/wixstdba/precomp.cpp b/src/ext/Bal/wixstdba/precomp.cpp
new file mode 100644
index 00000000..37664a1c
--- /dev/null
+++ b/src/ext/Bal/wixstdba/precomp.cpp
@@ -0,0 +1,3 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
diff --git a/src/ext/Bal/wixstdba/precomp.h b/src/ext/Bal/wixstdba/precomp.h
new file mode 100644
index 00000000..547183bd
--- /dev/null
+++ b/src/ext/Bal/wixstdba/precomp.h
@@ -0,0 +1,58 @@
+#pragma once
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+#include <windows.h>
+
+#pragma warning(push)
+#pragma warning(disable:4458) // declaration of 'xxx' hides class member
+#include <gdiplus.h>
+#pragma warning(pop)
+
+#include <msiquery.h>
+#include <objbase.h>
+#include <shlobj.h>
+#include <shlwapi.h>
+#include <stdlib.h>
+#include <strsafe.h>
+#include <stddef.h>
+
+#include "dutil.h"
+#include "apputil.h"
+#include "memutil.h"
+#include "dictutil.h"
+#include "dirutil.h"
+#include "fileutil.h"
+#include "locutil.h"
+#include "logutil.h"
+#include "pathutil.h"
+#include "resrutil.h"
+#include "shelutil.h"
+#include "strutil.h"
+#include "thmutil.h"
+#include "verutil.h"
+#include "uriutil.h"
+#include "xmlutil.h"
+
+#include "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+
+#include "balutil.h"
+#include "balinfo.h"
+#include "balcondition.h"
+
+#include "BAFunctions.h"
+
+#include "wixstdba.messages.h"
+
+HRESULT CreateBootstrapperApplication(
+    __in HMODULE hModule,
+    __in BOOL fPrereq,
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults,
+    __out IBootstrapperApplication** ppApplication
+    );
diff --git a/src/ext/Bal/wixstdba/resource.h b/src/ext/Bal/wixstdba/resource.h
new file mode 100644
index 00000000..149a8ff4
--- /dev/null
+++ b/src/ext/Bal/wixstdba/resource.h
@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#define IDC_STATIC                      -1
+
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1003
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif
diff --git a/src/ext/Bal/wixstdba/wixstdba.cpp b/src/ext/Bal/wixstdba/wixstdba.cpp
new file mode 100644
index 00000000..a96f1738
--- /dev/null
+++ b/src/ext/Bal/wixstdba/wixstdba.cpp
@@ -0,0 +1,144 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+static HINSTANCE vhInstance = NULL;
+static IBootstrapperApplication* vpApplication = NULL;
+
+static void CALLBACK WixstdbaTraceError(
+    __in_z LPCSTR szFile,
+    __in int iLine,
+    __in REPORT_LEVEL rl,
+    __in UINT source,
+    __in HRESULT hrError,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args
+    );
+
+extern "C" BOOL WINAPI DllMain(
+    IN HINSTANCE hInstance,
+    IN DWORD dwReason,
+    IN LPVOID /* pvReserved */
+    )
+{
+    switch(dwReason)
+    {
+    case DLL_PROCESS_ATTACH:
+        ::DisableThreadLibraryCalls(hInstance);
+        vhInstance = hInstance;
+        break;
+
+    case DLL_PROCESS_DETACH:
+        vhInstance = NULL;
+        break;
+    }
+
+    return TRUE;
+}
+
+
+extern "C" HRESULT WINAPI BootstrapperApplicationCreate(
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+    IBootstrapperEngine* pEngine = NULL;
+
+    DutilInitialize(&WixstdbaTraceError);
+
+    hr = BalInitializeFromCreateArgs(pArgs, &pEngine);
+    ExitOnFailure(hr, "Failed to initialize Bal.");
+
+    hr = CreateBootstrapperApplication(vhInstance, FALSE, S_OK, pEngine, pArgs, pResults, &vpApplication);
+    BalExitOnFailure(hr, "Failed to create bootstrapper application interface.");
+
+LExit:
+    ReleaseObject(pEngine);
+
+    return hr;
+}
+
+
+extern "C" void WINAPI BootstrapperApplicationDestroy()
+{
+    ReleaseNullObject(vpApplication);
+    BalUninitialize();
+    DutilUninitialize();
+}
+
+
+extern "C" HRESULT WINAPI DncPrereqBootstrapperApplicationCreate(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+
+    DutilInitialize(&WixstdbaTraceError);
+
+    BalInitialize(pEngine);
+
+    hr = CreateBootstrapperApplication(vhInstance, TRUE, hrHostInitialization, pEngine, pArgs, pResults, &vpApplication);
+    BalExitOnFailure(hr, "Failed to create .NET Core prerequisite bootstrapper application interface.");
+
+LExit:
+    return hr;
+}
+
+
+extern "C" void WINAPI DncPrereqBootstrapperApplicationDestroy()
+{
+    ReleaseNullObject(vpApplication);
+    BalUninitialize();
+    DutilUninitialize();
+}
+
+
+extern "C" HRESULT WINAPI MbaPrereqBootstrapperApplicationCreate(
+    __in HRESULT hrHostInitialization,
+    __in IBootstrapperEngine* pEngine,
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __inout BOOTSTRAPPER_CREATE_RESULTS* pResults
+    )
+{
+    HRESULT hr = S_OK;
+
+    DutilInitialize(&WixstdbaTraceError);
+
+    BalInitialize(pEngine);
+
+    hr = CreateBootstrapperApplication(vhInstance, TRUE, hrHostInitialization, pEngine, pArgs, pResults, &vpApplication);
+    BalExitOnFailure(hr, "Failed to create managed prerequisite bootstrapper application interface.");
+
+LExit:
+    return hr;
+}
+
+
+extern "C" void WINAPI MbaPrereqBootstrapperApplicationDestroy()
+{
+    ReleaseNullObject(vpApplication);
+    BalUninitialize();
+    DutilUninitialize();
+}
+
+static void CALLBACK WixstdbaTraceError(
+    __in_z LPCSTR /*szFile*/,
+    __in int /*iLine*/,
+    __in REPORT_LEVEL /*rl*/,
+    __in UINT source,
+    __in HRESULT hrError,
+    __in_z __format_string LPCSTR szFormat,
+    __in va_list args
+    )
+{
+    // BalLogError currently uses the Exit... macros,
+    // so if expanding the scope need to ensure this doesn't get called recursively.
+    if (DUTIL_SOURCE_THMUTIL == source)
+    {
+        BalLogErrorArgs(hrError, szFormat, args);
+    }
+}
diff --git a/src/ext/Bal/wixstdba/wixstdba.def b/src/ext/Bal/wixstdba/wixstdba.def
new file mode 100644
index 00000000..ba9980d3
--- /dev/null
+++ b/src/ext/Bal/wixstdba/wixstdba.def
@@ -0,0 +1,10 @@
+; Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+EXPORTS
+    BootstrapperApplicationCreate
+    BootstrapperApplicationDestroy
+    DncPrereqBootstrapperApplicationCreate
+    DncPrereqBootstrapperApplicationDestroy
+    MbaPrereqBootstrapperApplicationCreate
+    MbaPrereqBootstrapperApplicationDestroy
diff --git a/src/ext/Bal/wixstdba/wixstdba.mc b/src/ext/Bal/wixstdba/wixstdba.mc
new file mode 100644
index 00000000..688b1da1
--- /dev/null
+++ b/src/ext/Bal/wixstdba/wixstdba.mc
@@ -0,0 +1,73 @@
+; // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+
+MessageIdTypedef=DWORD
+
+LanguageNames=(English=0x409:MSG00409)
+
+
+; // message definitions
+
+; // MessageId=#
+; // Severity=Success
+; // SymbolicName=MSG_SUCCESS
+; // Language=English
+; // Success %1.
+; // .
+;
+; // MessageId=#
+; // Severity=Warning
+; // SymbolicName=MSG_WARNING
+; // Language=English
+; // Warning %1.
+; // .
+;
+; // MessageId=#
+; // Severity=Error
+; // SymbolicName=MSG_ERROR
+; // Language=English
+; // Error %1.
+; // .
+
+MessageId=1
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_FORWARD_COMPATIBLE_BUNDLE
+Language=English
+WIXSTDBA: Planned forward compatible bundle: %1!ls!, wixstdba requested: %2!hs!, bafunctions requested: %3!hs!
+.
+
+MessageId=2
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_PACKAGE
+Language=English
+WIXSTDBA: Planned package: %1!ls!, wixstdba requested: %2!hs!, bafunctions requested: %3!hs!
+.
+
+MessageId=3
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_RELATED_BUNDLE
+Language=English
+WIXSTDBA: Planned related bundle: %1!ls!, wixstdba requested: %2!hs!, bafunctions requested: %3!hs!
+.
+
+MessageId=5
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_TARGET_MSI_PACKAGE
+Language=English
+WIXSTDBA: Planned target MSI package: %1!ls!, productCode: %2!ls!, wixstdba requested: %3!hs!, bafunctions requested: %4!hs!
+.
+
+MessageId=6
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_MSI_FEATURE
+Language=English
+WIXSTDBA: Planned MSI feature: %2!ls! for %1!ls!, wixstdba requested: %3!hs!, bafunctions requested: %4!hs!
+.
+
+MessageId=7
+Severity=Success
+SymbolicName=MSG_WIXSTDBA_PLANNED_MSI_PACKAGE
+Language=English
+WIXSTDBA: Planned MSI package: %1!ls!, wixstdba requested: actionMsiProperty=%2!d!;uiLevel=%3!d!;disableExternalUiHandler=%4!hs!, bafunctions requested: actionMsiProperty=%5!d!;uiLevel=%6!d!;disableExternalUiHandler=%7!hs!
+.
+
diff --git a/src/ext/Bal/wixstdba/wixstdba.vcxproj b/src/ext/Bal/wixstdba/wixstdba.vcxproj
new file mode 100644
index 00000000..06b1c8d8
--- /dev/null
+++ b/src/ext/Bal/wixstdba/wixstdba.vcxproj
@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" />
+  <Import Project="..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props" Condition="Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" />
+  <Import Project="..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props" Condition="Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" />
+  <Import Project="..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props" Condition="Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" />
+
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{41085A22-E6AA-4E8B-AB1B-DDEE0DC89DFA}</ProjectGuid>
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <PlatformToolset>v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <TargetName>WixStdBA</TargetName>
+    <ProjectModuleDefinitionFile>wixstdba.def</ProjectModuleDefinitionFile>
+  </PropertyGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+
+  <PropertyGroup>
+    <ProjectAdditionalLinkLibraries>comctl32.lib;gdiplus.lib;msimg32.lib;shlwapi.lib;wininet.lib;wixstdba.res</ProjectAdditionalLinkLibraries>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ClCompile Include="precomp.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+    <ClCompile Include="WixStandardBootstrapperApplication.cpp" />
+    <ClCompile Include="wixstdba.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="precomp.h" />
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="wixstdba.def" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <CustomBuild Include="wixstdba.mc">
+      <Message>Compiling message file...</Message>
+      <Command>mc.exe -h "$(IntDir)." -r "$(IntDir)." -A -c -z wixstdba.messages "$(InputDir)wixstdba.mc"
+rc.exe -fo "$(OutDir)wixstdba.res" "$(IntDir)wixstdba.messages.rc"</Command>
+      <Outputs>$(IntDir)wixstdba.messages.h;$(IntDir)wixstdba.messages.rc</Outputs>
+    </CustomBuild>
+  </ItemGroup>
+
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <Import Project="..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets" Condition="Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" />
+  <Import Project="..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets" Condition="Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" />
+  <Import Project="..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets" Condition="Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.Build.Tasks.Git.1.0.0\build\Microsoft.Build.Tasks.Git.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.Common.1.0.0\build\Microsoft.SourceLink.Common.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.props'))" />
+    <Error Condition="!Exists('..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Microsoft.SourceLink.GitHub.1.0.0\build\Microsoft.SourceLink.GitHub.targets'))" />
+    <Error Condition="!Exists('..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\Nerdbank.GitVersioning.3.3.37\build\Nerdbank.GitVersioning.targets'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BalUtil.4.0.58\build\WixToolset.BalUtil.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.BootstrapperCore.Native.4.0.141\build\WixToolset.BootstrapperCore.Native.props'))" />
+    <Error Condition="!Exists('..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\packages\WixToolset.DUtil.4.0.72\build\WixToolset.DUtil.props'))" />
+  </Target>
+</Project>
\ No newline at end of file