Import code from old v4 repo

17 files changed, 4724 insertions, 0 deletions

diff --git a/src/balutil/BalBootstrapperEngine.cpp b/src/balutil/BalBootstrapperEngine.cpp
new file mode 100644
index 00000000..945940c5
--- /dev/null
+++ b/src/balutil/BalBootstrapperEngine.cpp
@@ -0,0 +1,720 @@
+// 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"
+
+
+class CBalBootstrapperEngine : public IBootstrapperEngine, public IMarshal
+{
+public: // IUnknown
+    virtual STDMETHODIMP QueryInterface(
+        __in REFIID riid,
+        __out LPVOID *ppvObject
+        )
+    {
+        if (!ppvObject)
+        {
+            return E_INVALIDARG;
+        }
+
+        *ppvObject = NULL;
+
+        if (::IsEqualIID(__uuidof(IBootstrapperEngine), riid))
+        {
+            *ppvObject = static_cast<IBootstrapperEngine*>(this);
+        }
+        else if (::IsEqualIID(IID_IMarshal, riid))
+        {
+            *ppvObject = static_cast<IMarshal*>(this);
+        }
+        else if (::IsEqualIID(IID_IUnknown, riid))
+        {
+            *ppvObject = reinterpret_cast<IUnknown*>(this);
+        }
+        else // no interface for requested iid
+        {
+            return E_NOINTERFACE;
+        }
+
+        AddRef();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP_(ULONG) AddRef()
+    {
+        return ::InterlockedIncrement(&this->m_cReferences);
+    }
+
+    virtual STDMETHODIMP_(ULONG) Release()
+    {
+        long l = ::InterlockedDecrement(&this->m_cReferences);
+        if (0 < l)
+        {
+            return l;
+        }
+
+        delete this;
+        return 0;
+    }
+
+public: // IBootstrapperEngine
+    virtual STDMETHODIMP GetPackageCount(
+        __out DWORD* pcPackages
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_GETPACKAGECOUNT_ARGS args = { };
+        BAENGINE_GETPACKAGECOUNT_RESULTS results = { };
+
+        ExitOnNull(pcPackages, hr, E_INVALIDARG, "pcPackages is required");
+
+        args.cbSize = sizeof(args);
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_GETPACKAGECOUNT, &args, &results, m_pvBAEngineProcContext);
+
+        *pcPackages = results.cPackages;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP GetVariableNumeric(
+        __in_z LPCWSTR wzVariable,
+        __out LONGLONG* pllValue
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_GETVARIABLENUMERIC_ARGS args = { };
+        BAENGINE_GETVARIABLENUMERIC_RESULTS results = { };
+
+        ExitOnNull(pllValue, hr, E_INVALIDARG, "pllValue is required");
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_GETVARIABLENUMERIC, &args, &results, m_pvBAEngineProcContext);
+
+        *pllValue = results.llValue;
+
+    LExit:
+        SecureZeroMemory(&results, sizeof(results));
+        return hr;
+    }
+
+    virtual STDMETHODIMP GetVariableString(
+        __in_z LPCWSTR wzVariable,
+        __out_ecount_opt(*pcchValue) LPWSTR wzValue,
+        __inout DWORD* pcchValue
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_GETVARIABLESTRING_ARGS args = { };
+        BAENGINE_GETVARIABLESTRING_RESULTS results = { };
+
+        ExitOnNull(pcchValue, hr, E_INVALIDARG, "pcchValue is required");
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+
+        results.cbSize = sizeof(results);
+        results.wzValue = wzValue;
+        results.cchValue = *pcchValue;
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_GETVARIABLESTRING, &args, &results, m_pvBAEngineProcContext);
+
+        *pcchValue = results.cchValue;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP GetVariableVersion(
+        __in_z LPCWSTR wzVariable,
+        __out DWORD64* pqwValue
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_GETVARIABLEVERSION_ARGS args = { };
+        BAENGINE_GETVARIABLEVERSION_RESULTS results = { };
+
+        ExitOnNull(pqwValue, hr, E_INVALIDARG, "pqwValue is required");
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_GETVARIABLEVERSION, &args, &results, m_pvBAEngineProcContext);
+
+        *pqwValue = results.qwValue;
+
+    LExit:
+        SecureZeroMemory(&results, sizeof(results));
+        return hr;
+    }
+
+    virtual STDMETHODIMP FormatString(
+        __in_z LPCWSTR wzIn,
+        __out_ecount_opt(*pcchOut) LPWSTR wzOut,
+        __inout DWORD* pcchOut
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_FORMATSTRING_ARGS args = { };
+        BAENGINE_FORMATSTRING_RESULTS results = { };
+
+        ExitOnNull(pcchOut, hr, E_INVALIDARG, "pcchOut is required");
+
+        args.cbSize = sizeof(args);
+        args.wzIn = wzIn;
+
+        results.cbSize = sizeof(results);
+        results.wzOut = wzOut;
+        results.cchOut = *pcchOut;
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_FORMATSTRING, &args, &results, m_pvBAEngineProcContext);
+
+        *pcchOut = results.cchOut;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP EscapeString(
+        __in_z LPCWSTR wzIn,
+        __out_ecount_opt(*pcchOut) LPWSTR wzOut,
+        __inout DWORD* pcchOut
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_ESCAPESTRING_ARGS args = { };
+        BAENGINE_ESCAPESTRING_RESULTS results = { };
+
+        ExitOnNull(pcchOut, hr, E_INVALIDARG, "pcchOut is required");
+
+        args.cbSize = sizeof(args);
+        args.wzIn = wzIn;
+
+        results.cbSize = sizeof(results);
+        results.wzOut = wzOut;
+        results.cchOut = *pcchOut;
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_ESCAPESTRING, &args, &results, m_pvBAEngineProcContext);
+
+        *pcchOut = results.cchOut;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP EvaluateCondition(
+        __in_z LPCWSTR wzCondition,
+        __out BOOL* pf
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_EVALUATECONDITION_ARGS args = { };
+        BAENGINE_EVALUATECONDITION_RESULTS results = { };
+
+        ExitOnNull(pf, hr, E_INVALIDARG, "pf is required");
+
+        args.cbSize = sizeof(args);
+        args.wzCondition = wzCondition;
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_EVALUATECONDITION, &args, &results, m_pvBAEngineProcContext);
+
+        *pf = results.f;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP Log(
+        __in BOOTSTRAPPER_LOG_LEVEL level,
+        __in_z LPCWSTR wzMessage
+        )
+    {
+        BAENGINE_LOG_ARGS args = { };
+        BAENGINE_LOG_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.level = level;
+        args.wzMessage = wzMessage;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_LOG, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SendEmbeddedError(
+        __in DWORD dwErrorCode,
+        __in_z_opt LPCWSTR wzMessage,
+        __in DWORD dwUIHint,
+        __out int* pnResult
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_SENDEMBEDDEDERROR_ARGS args = { };
+        BAENGINE_SENDEMBEDDEDERROR_RESULTS results = { };
+
+        ExitOnNull(pnResult, hr, E_INVALIDARG, "pnResult is required");
+
+        args.cbSize = sizeof(args);
+        args.dwErrorCode = dwErrorCode;
+        args.wzMessage = wzMessage;
+        args.dwUIHint = dwUIHint;
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SENDEMBEDDEDERROR, &args, &results, m_pvBAEngineProcContext);
+
+        *pnResult = results.nResult;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP SendEmbeddedProgress(
+        __in DWORD dwProgressPercentage,
+        __in DWORD dwOverallProgressPercentage,
+        __out int* pnResult
+        )
+    {
+        HRESULT hr = S_OK;
+        BAENGINE_SENDEMBEDDEDPROGRESS_ARGS args = { };
+        BAENGINE_SENDEMBEDDEDPROGRESS_RESULTS results = { };
+
+        ExitOnNull(pnResult, hr, E_INVALIDARG, "pnResult is required");
+
+        args.cbSize = sizeof(args);
+        args.dwProgressPercentage = dwProgressPercentage;
+        args.dwOverallProgressPercentage = dwOverallProgressPercentage;
+
+        results.cbSize = sizeof(results);
+
+        hr = m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SENDEMBEDDEDPROGRESS, &args, &results, m_pvBAEngineProcContext);
+
+        *pnResult = results.nResult;
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP SetUpdate(
+        __in_z_opt LPCWSTR wzLocalSource,
+        __in_z_opt LPCWSTR wzDownloadSource,
+        __in DWORD64 qwSize,
+        __in BOOTSTRAPPER_UPDATE_HASH_TYPE hashType,
+        __in_bcount_opt(cbHash) BYTE* rgbHash,
+        __in DWORD cbHash
+        )
+    {
+        BAENGINE_SETUPDATE_ARGS args = { };
+        BAENGINE_SETUPDATE_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzLocalSource = wzLocalSource;
+        args.wzDownloadSource = wzDownloadSource;
+        args.qwSize = qwSize;
+        args.hashType = hashType;
+        args.rgbHash = rgbHash;
+        args.cbHash = cbHash;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETUPDATE, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SetLocalSource(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in_z LPCWSTR wzPath
+        )
+    {
+        BAENGINE_SETLOCALSOURCE_ARGS args = { };
+        BAENGINE_SETLOCALSOURCE_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzPackageOrContainerId = wzPackageOrContainerId;
+        args.wzPayloadId = wzPayloadId;
+        args.wzPath = wzPath;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETLOCALSOURCE, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SetDownloadSource(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in_z LPCWSTR wzUrl,
+        __in_z_opt LPCWSTR wzUser,
+        __in_z_opt LPCWSTR wzPassword
+        )
+    {
+        BAENGINE_SETDOWNLOADSOURCE_ARGS args = { };
+        BAENGINE_SETDOWNLOADSOURCE_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzPackageOrContainerId = wzPackageOrContainerId;
+        args.wzPayloadId = wzPayloadId;
+        args.wzUrl = wzUrl;
+        args.wzUser = wzUser;
+        args.wzPassword = wzPassword;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETDOWNLOADSOURCE, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SetVariableNumeric(
+        __in_z LPCWSTR wzVariable,
+        __in LONGLONG llValue
+        )
+    {
+        BAENGINE_SETVARIABLENUMERIC_ARGS args = { };
+        BAENGINE_SETVARIABLENUMERIC_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+        args.llValue = llValue;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETVARIABLENUMERIC, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SetVariableString(
+        __in_z LPCWSTR wzVariable,
+        __in_z_opt LPCWSTR wzValue
+        )
+    {
+        BAENGINE_SETVARIABLESTRING_ARGS args = { };
+        BAENGINE_SETVARIABLESTRING_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+        args.wzValue = wzValue;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETVARIABLESTRING, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP SetVariableVersion(
+        __in_z LPCWSTR wzVariable,
+        __in DWORD64 qwValue
+        )
+    {
+        BAENGINE_SETVARIABLEVERSION_ARGS args = { };
+        BAENGINE_SETVARIABLEVERSION_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.wzVariable = wzVariable;
+        args.qwValue = qwValue;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_SETVARIABLEVERSION, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP CloseSplashScreen()
+    {
+        BAENGINE_CLOSESPLASHSCREEN_ARGS args = { };
+        BAENGINE_CLOSESPLASHSCREEN_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_CLOSESPLASHSCREEN, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP Detect(
+        __in_opt HWND hwndParent
+        )
+    {
+        BAENGINE_DETECT_ARGS args = { };
+        BAENGINE_DETECT_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.hwndParent = hwndParent;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_DETECT, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP Plan(
+        __in BOOTSTRAPPER_ACTION action
+        )
+    {
+        BAENGINE_PLAN_ARGS args = { };
+        BAENGINE_PLAN_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.action = action;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_PLAN, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP Elevate(
+        __in_opt HWND hwndParent
+        )
+    {
+        BAENGINE_ELEVATE_ARGS args = { };
+        BAENGINE_ELEVATE_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.hwndParent = hwndParent;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_ELEVATE, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP Apply(
+        __in_opt HWND hwndParent
+        )
+    {
+        BAENGINE_APPLY_ARGS args = { };
+        BAENGINE_APPLY_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.hwndParent = hwndParent;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_APPLY, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP Quit(
+        __in DWORD dwExitCode
+        )
+    {
+        BAENGINE_QUIT_ARGS args = { };
+        BAENGINE_QUIT_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.dwExitCode = dwExitCode;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_QUIT, &args, &results, m_pvBAEngineProcContext);
+    }
+
+    virtual STDMETHODIMP LaunchApprovedExe(
+        __in_opt HWND hwndParent,
+        __in_z LPCWSTR wzApprovedExeForElevationId,
+        __in_z_opt LPCWSTR wzArguments,
+        __in DWORD dwWaitForInputIdleTimeout
+        )
+    {
+        BAENGINE_LAUNCHAPPROVEDEXE_ARGS args = { };
+        BAENGINE_LAUNCHAPPROVEDEXE_RESULTS results = { };
+
+        args.cbSize = sizeof(args);
+        args.hwndParent = hwndParent;
+        args.wzApprovedExeForElevationId = wzApprovedExeForElevationId;
+        args.wzArguments = wzArguments;
+        args.dwWaitForInputIdleTimeout = dwWaitForInputIdleTimeout;
+
+        results.cbSize = sizeof(results);
+
+        return m_pfnBAEngineProc(BOOTSTRAPPER_ENGINE_MESSAGE_LAUNCHAPPROVEDEXE, &args, &results, m_pvBAEngineProcContext);
+    }
+
+public: // IMarshal
+    virtual STDMETHODIMP GetUnmarshalClass(
+        __in REFIID /*riid*/,
+        __in_opt LPVOID /*pv*/,
+        __in DWORD /*dwDestContext*/,
+        __reserved LPVOID /*pvDestContext*/,
+        __in DWORD /*mshlflags*/,
+        __out LPCLSID /*pCid*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+    virtual STDMETHODIMP GetMarshalSizeMax(
+        __in REFIID riid,
+        __in_opt LPVOID /*pv*/,
+        __in DWORD dwDestContext,
+        __reserved LPVOID /*pvDestContext*/,
+        __in DWORD /*mshlflags*/,
+        __out DWORD *pSize
+        )
+    {
+        HRESULT hr = S_OK;
+
+        // We only support marshaling the IBootstrapperEngine interface in-proc.
+        if (__uuidof(IBootstrapperEngine) != riid)
+        {
+            // Skip logging the following message since it appears way too often in the log.
+            // "Unexpected IID requested to be marshalled. BootstrapperEngineForApplication can only marshal the IBootstrapperEngine interface."
+            ExitFunction1(hr = E_NOINTERFACE);
+        }
+        else if (0 == (MSHCTX_INPROC & dwDestContext))
+        {
+            hr = E_FAIL;
+            ExitOnRootFailure(hr, "Cannot marshal IBootstrapperEngine interface out of proc.");
+        }
+
+        // E_FAIL is used because E_INVALIDARG is not a supported return value.
+        ExitOnNull(pSize, hr, E_FAIL, "Invalid size output parameter is NULL.");
+
+        // Specify enough size to marshal just the interface pointer across threads.
+        *pSize = sizeof(LPVOID);
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP MarshalInterface(
+        __in IStream* pStm,
+        __in REFIID riid,
+        __in_opt LPVOID pv,
+        __in DWORD dwDestContext,
+        __reserved LPVOID /*pvDestContext*/,
+        __in DWORD /*mshlflags*/
+        )
+    {
+        HRESULT hr = S_OK;
+        IBootstrapperEngine *pThis = NULL;
+        ULONG ulWritten = 0;
+
+        // We only support marshaling the IBootstrapperEngine interface in-proc.
+        if (__uuidof(IBootstrapperEngine) != riid)
+        {
+            // Skip logging the following message since it appears way too often in the log.
+            // "Unexpected IID requested to be marshalled. BootstrapperEngineForApplication can only marshal the IBootstrapperEngine interface."
+            ExitFunction1(hr = E_NOINTERFACE);
+        }
+        else if (0 == (MSHCTX_INPROC & dwDestContext))
+        {
+            hr = E_FAIL;
+            ExitOnRootFailure(hr, "Cannot marshal IBootstrapperEngine interface out of proc.");
+        }
+
+        // "pv" may not be set, so we should us "this" otherwise.
+        if (pv)
+        {
+            pThis = reinterpret_cast<IBootstrapperEngine*>(pv);
+        }
+        else
+        {
+            pThis = static_cast<IBootstrapperEngine*>(this);
+        }
+
+        // E_INVALIDARG is not a supported return value.
+        ExitOnNull(pStm, hr, E_FAIL, "The marshaling stream parameter is NULL.");
+
+        // Marshal the interface pointer in-proc as is.
+        hr = pStm->Write(pThis, sizeof(pThis), &ulWritten);
+        if (STG_E_MEDIUMFULL == hr)
+        {
+            ExitOnFailure(hr, "Failed to write the stream because the stream is full.");
+        }
+        else if (FAILED(hr))
+        {
+            // All other STG error must be converted into E_FAIL based on IMarshal documentation.
+            hr = E_FAIL;
+            ExitOnFailure(hr, "Failed to write the IBootstrapperEngine interface pointer to the marshaling stream.");
+        }
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP UnmarshalInterface(
+        __in IStream* pStm,
+        __in REFIID riid,
+        __deref_out LPVOID* ppv
+        )
+    {
+        HRESULT hr = S_OK;
+        ULONG ulRead = 0;
+
+        // We only support marshaling the engine in-proc.
+        if (__uuidof(IBootstrapperEngine) != riid)
+        {
+            // Skip logging the following message since it appears way too often in the log.
+            // "Unexpected IID requested to be marshalled. BootstrapperEngineForApplication can only marshal the IBootstrapperEngine interface."
+            ExitFunction1(hr = E_NOINTERFACE);
+        }
+
+        // E_FAIL is used because E_INVALIDARG is not a supported return value.
+        ExitOnNull(pStm, hr, E_FAIL, "The marshaling stream parameter is NULL.");
+        ExitOnNull(ppv, hr, E_FAIL, "The interface output parameter is NULL.");
+
+        // Unmarshal the interface pointer in-proc as is.
+        hr = pStm->Read(*ppv, sizeof(LPVOID), &ulRead);
+        if (FAILED(hr))
+        {
+            // All STG errors must be converted into E_FAIL based on IMarshal documentation.
+            hr = E_FAIL;
+            ExitOnFailure(hr, "Failed to read the IBootstrapperEngine interface pointer from the marshaling stream.");
+        }
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP ReleaseMarshalData(
+        __in IStream* /*pStm*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+    virtual STDMETHODIMP DisconnectObject(
+        __in DWORD /*dwReserved*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+public:
+    CBalBootstrapperEngine(
+        __in PFN_BOOTSTRAPPER_ENGINE_PROC pfnBAEngineProc,
+        __in_opt LPVOID pvBAEngineProcContext
+        )
+    {
+        m_cReferences = 1;
+        m_pfnBAEngineProc = pfnBAEngineProc;
+        m_pvBAEngineProcContext = pvBAEngineProcContext;
+    }
+
+private:
+    long m_cReferences;
+    PFN_BOOTSTRAPPER_ENGINE_PROC m_pfnBAEngineProc;
+    LPVOID m_pvBAEngineProcContext;
+};
+
+HRESULT BalBootstrapperEngineCreate(
+    __in PFN_BOOTSTRAPPER_ENGINE_PROC pfnBAEngineProc,
+    __in_opt LPVOID pvBAEngineProcContext,
+    __out IBootstrapperEngine** ppBootstrapperEngine
+    )
+{
+    HRESULT hr = S_OK;
+    CBalBootstrapperEngine* pBootstrapperEngine = NULL;
+
+    pBootstrapperEngine = new CBalBootstrapperEngine(pfnBAEngineProc, pvBAEngineProcContext);
+    ExitOnNull(pBootstrapperEngine, hr, E_OUTOFMEMORY, "Failed to allocate new BalBootstrapperEngine object.");
+
+    hr = pBootstrapperEngine->QueryInterface(IID_PPV_ARGS(ppBootstrapperEngine));
+    ExitOnFailure(hr, "Failed to QI for IBootstrapperEngine from BalBootstrapperEngine object.");
+
+LExit:
+    ReleaseObject(pBootstrapperEngine);
+    return hr;
+}
diff --git a/src/balutil/balcondition.cpp b/src/balutil/balcondition.cpp
new file mode 100644
index 00000000..11d3e218
--- /dev/null
+++ b/src/balutil/balcondition.cpp
@@ -0,0 +1,124 @@
+// 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"
+
+// prototypes
+
+
+DAPI_(HRESULT) BalConditionsParseFromXml(
+    __in BAL_CONDITIONS* pConditions,
+    __in IXMLDOMDocument* pixdManifest,
+    __in_opt WIX_LOCALIZATION* pWixLoc
+    )
+{
+    HRESULT hr = S_OK;
+    IXMLDOMNodeList* pNodeList = NULL;
+    IXMLDOMNode* pNode = NULL;
+    BAL_CONDITION* prgConditions = NULL;
+    DWORD cConditions = 0;
+
+    hr = XmlSelectNodes(pixdManifest, L"/BootstrapperApplicationData/WixBalCondition", &pNodeList);
+    ExitOnFailure(hr, "Failed to select all conditions.");
+
+    hr = pNodeList->get_length(reinterpret_cast<long*>(&cConditions));
+    ExitOnFailure(hr, "Failed to get the condition count.");
+
+    if (!cConditions)
+    {
+        ExitFunction();
+    }
+
+    prgConditions = static_cast<BAL_CONDITION*>(MemAlloc(sizeof(BAL_CONDITION) * cConditions, TRUE));
+    ExitOnNull(prgConditions, hr, E_OUTOFMEMORY, "Failed to allocate memory for conditions.");
+
+    DWORD iCondition = 0;
+    while (S_OK == (hr = XmlNextElement(pNodeList, &pNode, NULL)))
+    {
+        hr = XmlGetAttributeEx(pNode, L"Condition", &prgConditions[iCondition].sczCondition);
+        ExitOnFailure(hr, "Failed to get condition for condition.");
+
+        hr = XmlGetAttributeEx(pNode, L"Message", &prgConditions[iCondition].sczMessage);
+        ExitOnFailure(hr, "Failed to get message for condition.");
+
+        if (pWixLoc && prgConditions[iCondition].sczMessage && *prgConditions[iCondition].sczMessage)
+        {
+            hr = LocLocalizeString(pWixLoc, &prgConditions[iCondition].sczMessage);
+            ExitOnFailure(hr, "Failed to localize condition message.");
+        }
+
+        ++iCondition;
+        ReleaseNullObject(pNode);
+    }
+    ExitOnFailure(hr, "Failed to parse all condition elements.");
+
+    if (S_FALSE == hr)
+    {
+        hr = S_OK;
+    }
+
+    pConditions->cConditions = cConditions;
+    pConditions->rgConditions = prgConditions;
+    prgConditions = NULL;
+
+LExit:
+    ReleaseMem(prgConditions);
+    ReleaseObject(pNode);
+    ReleaseObject(pNodeList);
+
+    return hr;
+}
+
+
+//the contents of psczMessage may be sensitive, should keep encrypted and SecureZeroFree
+DAPI_(HRESULT) BalConditionEvaluate(
+    __in BAL_CONDITION* pCondition,
+    __in IBootstrapperEngine* pEngine,
+    __out BOOL* pfResult,
+    __out_z_opt LPWSTR* psczMessage
+    )
+{
+    HRESULT hr = S_OK;
+    DWORD_PTR cchMessage = 0;
+
+    hr = pEngine->EvaluateCondition(pCondition->sczCondition, pfResult);
+    ExitOnFailure(hr, "Failed to evaluate condition with bootstrapper engine.");
+
+    if (psczMessage)
+    {
+        if (*psczMessage)
+        {
+            hr = StrMaxLength(*psczMessage, &cchMessage);
+            ExitOnFailure(hr, "Failed to get length of message.");
+        }
+
+        hr = pEngine->FormatString(pCondition->sczMessage, *psczMessage, reinterpret_cast<DWORD*>(&cchMessage));
+        if (E_MOREDATA == hr)
+        {
+            ++cchMessage;
+
+            hr = StrAllocSecure(psczMessage, cchMessage);
+            ExitOnFailure(hr, "Failed to allocate string for condition's formatted message.");
+
+            hr = pEngine->FormatString(pCondition->sczMessage, *psczMessage, reinterpret_cast<DWORD*>(&cchMessage));
+        }
+        ExitOnFailure(hr, "Failed to format condition's message.");
+    }
+
+LExit:
+    return hr;
+}
+
+
+DAPI_(void) BalConditionsUninitialize(
+    __in BAL_CONDITIONS* pConditions
+    )
+{
+    for (DWORD i = 0; i < pConditions->cConditions; ++i)
+    {
+        ReleaseStr(pConditions->rgConditions[i].sczMessage);
+        ReleaseStr(pConditions->rgConditions[i].sczCondition);
+    }
+
+    ReleaseMem(pConditions->rgConditions);
+    memset(pConditions, 0, sizeof(BAL_CONDITIONS));
+}
diff --git a/src/balutil/balinfo.cpp b/src/balutil/balinfo.cpp
new file mode 100644
index 00000000..b36e3741
--- /dev/null
+++ b/src/balutil/balinfo.cpp
@@ -0,0 +1,288 @@
+// 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"
+
+// prototypes
+static HRESULT ParsePackagesFromXml(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in IXMLDOMDocument* pixdManifest
+    );
+
+
+DAPI_(HRESULT) BalInfoParseFromXml(
+    __in BAL_INFO_BUNDLE* pBundle,
+    __in IXMLDOMDocument* pixdManifest
+    )
+{
+    HRESULT hr = S_OK;
+    IXMLDOMNode* pNode = NULL;
+
+    hr = XmlSelectSingleNode(pixdManifest, L"/BootstrapperApplicationData/WixBundleProperties", &pNode);
+    ExitOnFailure(hr, "Failed to select bundle information.");
+
+    if (S_OK == hr)
+    {
+        hr = XmlGetYesNoAttribute(pNode, L"PerMachine", &pBundle->fPerMachine);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to read bundle information per-machine.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"DisplayName", &pBundle->sczName);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to read bundle information display name.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"LogPathVariable", &pBundle->sczLogVariable);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to read bundle information log path variable.");
+        }
+    }
+
+    hr = ParsePackagesFromXml(&pBundle->packages, pixdManifest);
+    BalExitOnFailure(hr, "Failed to parse package information from bootstrapper application data.");
+
+LExit:
+    ReleaseObject(pNode);
+
+    return hr;
+}
+
+
+DAPI_(HRESULT) BalInfoAddRelatedBundleAsPackage(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in LPCWSTR wzId,
+    __in BOOTSTRAPPER_RELATION_TYPE relationType,
+    __in BOOL /*fPerMachine*/
+    )
+{
+    HRESULT hr = S_OK;
+    BAL_INFO_PACKAGE_TYPE type = BAL_INFO_PACKAGE_TYPE_UNKNOWN;
+    BAL_INFO_PACKAGE* pPackage = NULL;
+
+    // Ensure we have a supported relation type.
+    switch (relationType)
+    {
+    case BOOTSTRAPPER_RELATION_ADDON:
+        type = BAL_INFO_PACKAGE_TYPE_BUNDLE_ADDON;
+        break;
+
+    case BOOTSTRAPPER_RELATION_PATCH:
+        type = BAL_INFO_PACKAGE_TYPE_BUNDLE_PATCH;
+        break;
+
+    case BOOTSTRAPPER_RELATION_UPGRADE:
+        type = BAL_INFO_PACKAGE_TYPE_BUNDLE_UPGRADE;
+        break;
+
+    default:
+        ExitOnFailure(hr = E_INVALIDARG, "Unknown related bundle type: %u", relationType);
+    }
+
+    // Check to see if the bundle is already in the list of packages.
+    for (DWORD i = 0; i < pPackages->cPackages; ++i)
+    {
+        if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, wzId, -1, pPackages->rgPackages[i].sczId, -1))
+        {
+            ExitFunction1(hr = HRESULT_FROM_WIN32(ERROR_ALREADY_EXISTS));
+        }
+    }
+
+    // Add the related bundle as a package.
+    hr = MemEnsureArraySize(reinterpret_cast<LPVOID*>(&pPackages->rgPackages), pPackages->cPackages + 1, sizeof(BAL_INFO_PACKAGE), 2);
+    ExitOnFailure(hr, "Failed to allocate memory for related bundle package information.");
+
+    pPackage = pPackages->rgPackages + pPackages->cPackages;
+    ++pPackages->cPackages;
+
+    hr = StrAllocString(&pPackage->sczId, wzId, 0);
+    ExitOnFailure(hr, "Failed to copy related bundle package id.");
+
+    pPackage->type = type;
+
+    // TODO: try to look up the DisplayName and Description in Add/Remove Programs with the wzId.
+
+LExit:
+    return hr;
+}
+
+
+DAPI_(HRESULT) BalInfoFindPackageById(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in LPCWSTR wzId,
+    __out BAL_INFO_PACKAGE** ppPackage
+    )
+{
+    *ppPackage = NULL;
+
+    for (DWORD i = 0; i < pPackages->cPackages; ++i)
+    {
+        if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, wzId, -1, pPackages->rgPackages[i].sczId, -1))
+        {
+            *ppPackage = pPackages->rgPackages + i;
+            break;
+        }
+    }
+
+    return *ppPackage ? S_OK : E_NOTFOUND;
+}
+
+
+DAPI_(void) BalInfoUninitialize(
+    __in BAL_INFO_BUNDLE* pBundle
+    )
+{
+    for (DWORD i = 0; i < pBundle->packages.cPackages; ++i)
+    {
+        ReleaseStr(pBundle->packages.rgPackages[i].sczDisplayName);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczDescription);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczId);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczProductCode);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczUpgradeCode);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczVersion);
+        ReleaseStr(pBundle->packages.rgPackages[i].sczInstallCondition);
+    }
+
+    ReleaseMem(pBundle->packages.rgPackages);
+
+    ReleaseStr(pBundle->sczName);
+    ReleaseStr(pBundle->sczLogVariable);
+    memset(pBundle, 0, sizeof(BAL_INFO_BUNDLE));
+}
+
+
+static HRESULT ParsePackagesFromXml(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in IXMLDOMDocument* pixdManifest
+    )
+{
+    HRESULT hr = S_OK;
+    IXMLDOMNodeList* pNodeList = NULL;
+    IXMLDOMNode* pNode = NULL;
+    BAL_INFO_PACKAGE* prgPackages = NULL;
+    DWORD cPackages = 0;
+    LPWSTR scz = NULL;
+
+    hr = XmlSelectNodes(pixdManifest, L"/BootstrapperApplicationData/WixPackageProperties", &pNodeList);
+    ExitOnFailure(hr, "Failed to select all packages.");
+
+    hr = pNodeList->get_length(reinterpret_cast<long*>(&cPackages));
+    ExitOnFailure(hr, "Failed to get the package count.");
+
+    prgPackages = static_cast<BAL_INFO_PACKAGE*>(MemAlloc(sizeof(BAL_INFO_PACKAGE) * cPackages, TRUE));
+    ExitOnNull(prgPackages, hr, E_OUTOFMEMORY, "Failed to allocate memory for packages.");
+
+    DWORD iPackage = 0;
+    while (S_OK == (hr = XmlNextElement(pNodeList, &pNode, NULL)))
+    {
+        hr = XmlGetAttributeEx(pNode, L"Package", &prgPackages[iPackage].sczId);
+        ExitOnFailure(hr, "Failed to get package identifier for package.");
+
+        hr = XmlGetAttributeEx(pNode, L"DisplayName", &prgPackages[iPackage].sczDisplayName);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get display name for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"Description", &prgPackages[iPackage].sczDescription);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get description for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"PackageType", &scz);
+        ExitOnFailure(hr, "Failed to get package type for package.");
+
+        if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, L"Exe", -1, scz, -1))
+        {
+            prgPackages[iPackage].type = BAL_INFO_PACKAGE_TYPE_EXE;
+        }
+        else if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, L"Msi", -1, scz, -1))
+        {
+            prgPackages[iPackage].type = BAL_INFO_PACKAGE_TYPE_MSI;
+        }
+        else if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, L"Msp", -1, scz, -1))
+        {
+            prgPackages[iPackage].type = BAL_INFO_PACKAGE_TYPE_MSP;
+        }
+        else if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, L"Msu", -1, scz, -1))
+        {
+            prgPackages[iPackage].type = BAL_INFO_PACKAGE_TYPE_MSU;
+        }
+
+        hr = XmlGetYesNoAttribute(pNode, L"Permanent", &prgPackages[iPackage].fPermanent);
+        ExitOnFailure(hr, "Failed to get permanent setting for package.");
+
+        hr = XmlGetYesNoAttribute(pNode, L"Vital", &prgPackages[iPackage].fVital);
+        ExitOnFailure(hr, "Failed to get vital setting for package.");
+
+        hr = XmlGetYesNoAttribute(pNode, L"DisplayInternalUI", &prgPackages[iPackage].fDisplayInternalUI);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get DisplayInternalUI setting for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"ProductCode", &prgPackages[iPackage].sczProductCode);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get product code for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"UpgradeCode", &prgPackages[iPackage].sczUpgradeCode);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get upgrade code for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"Version", &prgPackages[iPackage].sczVersion);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get version for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"InstallCondition", &prgPackages[iPackage].sczInstallCondition);
+        if (E_NOTFOUND != hr)
+        {
+            ExitOnFailure(hr, "Failed to get install condition for package.");
+        }
+
+        hr = XmlGetAttributeEx(pNode, L"Cache", &scz);
+        ExitOnFailure(hr, "Failed to get cache type for package.");
+
+        if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, scz, -1, L"no", -1))
+        {
+            prgPackages[iPackage].cacheType = BAL_INFO_CACHE_TYPE_NO;
+        }
+        else if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, scz, -1, L"yes", -1))
+        {
+            prgPackages[iPackage].cacheType = BAL_INFO_CACHE_TYPE_YES;
+        }
+        else if (CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, scz, -1, L"always", -1))
+        {
+            prgPackages[iPackage].cacheType = BAL_INFO_CACHE_TYPE_ALWAYS;
+        }
+
+        ++iPackage;
+        ReleaseNullObject(pNode);
+    }
+    ExitOnFailure(hr, "Failed to parse all package property elements.");
+
+    if (S_FALSE == hr)
+    {
+        hr = S_OK;
+    }
+
+    pPackages->cPackages = cPackages;
+    pPackages->rgPackages = prgPackages;
+    prgPackages = NULL;
+
+LExit:
+    ReleaseStr(scz);
+    ReleaseMem(prgPackages);
+    ReleaseObject(pNode);
+    ReleaseObject(pNodeList);
+
+    return hr;
+}
diff --git a/src/balutil/balretry.cpp b/src/balutil/balretry.cpp
new file mode 100644
index 00000000..d95d86b2
--- /dev/null
+++ b/src/balutil/balretry.cpp
@@ -0,0 +1,191 @@
+// 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"
+
+struct BALRETRY_INFO
+{
+    LPWSTR sczId;           // package or container id.
+    LPWSTR sczPayloadId;    // optional payload id.
+    DWORD cRetries;
+    DWORD dwLastError;
+};
+
+static DWORD vdwMaxRetries = 0;
+static DWORD vdwTimeout = 0;
+static BALRETRY_INFO vrgRetryInfo[2];
+
+// prototypes
+static BOOL IsActiveRetryEntry(
+    __in BALRETRY_TYPE type,
+    __in_z LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId
+    );
+
+
+DAPI_(void) BalRetryInitialize(
+    __in DWORD dwMaxRetries,
+    __in DWORD dwTimeout
+    )
+{
+    BalRetryUninitialize(); // clean everything out.
+
+    vdwMaxRetries = dwMaxRetries;
+    vdwTimeout = dwTimeout;
+}
+
+
+DAPI_(void) BalRetryUninitialize()
+{
+    for (DWORD i = 0; i < countof(vrgRetryInfo); ++i)
+    {
+        ReleaseStr(vrgRetryInfo[i].sczId);
+        ReleaseStr(vrgRetryInfo[i].sczPayloadId);
+        memset(vrgRetryInfo + i, 0, sizeof(BALRETRY_INFO));
+    }
+
+    vdwMaxRetries = 0;
+    vdwTimeout = 0;
+}
+
+
+DAPI_(void) BalRetryStartPackage(
+    __in BALRETRY_TYPE type,
+    __in_z_opt LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId
+    )
+{
+    if (!wzPackageId || !*wzPackageId)
+    {
+        ReleaseNullStr(vrgRetryInfo[type].sczId);
+        ReleaseNullStr(vrgRetryInfo[type].sczPayloadId);
+    }
+    else if (IsActiveRetryEntry(type, wzPackageId, wzPayloadId))
+    {
+        ++vrgRetryInfo[type].cRetries;
+        ::Sleep(vdwTimeout);
+    }
+    else
+    {
+        StrAllocString(&vrgRetryInfo[type].sczId, wzPackageId, 0);
+        if (wzPayloadId)
+        {
+            StrAllocString(&vrgRetryInfo[type].sczPayloadId, wzPayloadId, 0);
+        }
+
+        vrgRetryInfo[type].cRetries = 0;
+    }
+
+    vrgRetryInfo[type].dwLastError = ERROR_SUCCESS;
+}
+
+
+DAPI_(void) BalRetryErrorOccurred(
+    __in_z LPCWSTR wzPackageId,
+    __in DWORD dwError
+    )
+{
+    if (IsActiveRetryEntry(BALRETRY_TYPE_CACHE, wzPackageId, NULL))
+    {
+        vrgRetryInfo[BALRETRY_TYPE_CACHE].dwLastError = dwError;
+    }
+    else if (IsActiveRetryEntry(BALRETRY_TYPE_EXECUTE, wzPackageId, NULL))
+    {
+        vrgRetryInfo[BALRETRY_TYPE_EXECUTE].dwLastError = dwError;
+    }
+}
+
+
+DAPI_(HRESULT) BalRetryEndPackage(
+    __in BALRETRY_TYPE type,
+    __in_z_opt LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId,
+    __in HRESULT hrError,
+    __inout BOOL* pfRetry
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!wzPackageId || !*wzPackageId)
+    {
+        ReleaseNullStr(vrgRetryInfo[type].sczId);
+        ReleaseNullStr(vrgRetryInfo[type].sczPayloadId);
+    }
+    else if (FAILED(hrError) && vrgRetryInfo[type].cRetries < vdwMaxRetries && IsActiveRetryEntry(type, wzPackageId, wzPayloadId))
+    {
+        if (BALRETRY_TYPE_CACHE == type)
+        {
+            // Retry on all errors except the following.
+            if (HRESULT_FROM_WIN32(ERROR_INSTALL_USEREXIT) != hrError &&
+                BG_E_NETWORK_DISCONNECTED != hrError &&
+                HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND) != hrError &&
+                HRESULT_FROM_WIN32(ERROR_INTERNET_NAME_NOT_RESOLVED) != hrError)
+            {
+                *pfRetry = TRUE;
+            }
+        }
+        else if (BALRETRY_TYPE_EXECUTE == type)
+        {
+            // If the service is out of whack, just try again.
+            if (HRESULT_FROM_WIN32(ERROR_INSTALL_SERVICE_FAILURE) == hrError)
+            {
+                *pfRetry = TRUE;
+            }
+            else if (HRESULT_FROM_WIN32(ERROR_INSTALL_FAILURE) == hrError)
+            {
+                DWORD dwError = vrgRetryInfo[type].dwLastError;
+
+                // If we failed with one of these specific error codes, then retry since
+                // we've seen these have a high success of succeeding on retry.
+                if (1303 == dwError ||
+                    1304 == dwError ||
+                    1306 == dwError ||
+                    1307 == dwError ||
+                    1309 == dwError ||
+                    1310 == dwError ||
+                    1311 == dwError ||
+                    1312 == dwError ||
+                    1316 == dwError ||
+                    1317 == dwError ||
+                    1321 == dwError ||
+                    1335 == dwError ||
+                    1402 == dwError ||
+                    1406 == dwError ||
+                    1606 == dwError ||
+                    1706 == dwError ||
+                    1719 == dwError ||
+                    1723 == dwError ||
+                    1923 == dwError ||
+                    1931 == dwError)
+                {
+                    *pfRetry = TRUE;
+                }
+            }
+            else if (HRESULT_FROM_WIN32(ERROR_INSTALL_ALREADY_RUNNING) == hrError)
+            {
+                *pfRetry = TRUE;
+            }
+        }
+    }
+
+    return hr;
+}
+
+
+// Internal functions.
+
+static BOOL IsActiveRetryEntry(
+    __in BALRETRY_TYPE type,
+    __in_z LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId
+    )
+{
+    BOOL fActive = FALSE;
+
+    fActive = vrgRetryInfo[type].sczId && CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, wzPackageId, -1, vrgRetryInfo[type].sczId, -1);
+    if (fActive && wzPayloadId) // if a payload id was provided ensure it matches.
+    {
+        fActive = vrgRetryInfo[type].sczPayloadId && CSTR_EQUAL == ::CompareStringW(LOCALE_NEUTRAL, 0, wzPayloadId, -1, vrgRetryInfo[type].sczPayloadId, -1);
+    }
+
+    return fActive;
+}
diff --git a/src/balutil/balutil.cpp b/src/balutil/balutil.cpp
new file mode 100644
index 00000000..df254359
--- /dev/null
+++ b/src/balutil/balutil.cpp
@@ -0,0 +1,382 @@
+// 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"
+
+const DWORD VARIABLE_GROW_FACTOR = 80;
+static IBootstrapperEngine* vpEngine = NULL;
+
+// prototypes
+
+DAPI_(void) BalInitialize(
+    __in IBootstrapperEngine* pEngine
+    )
+{
+    pEngine->AddRef();
+
+    ReleaseObject(vpEngine);
+    vpEngine = pEngine;
+}
+
+DAPI_(HRESULT) BalInitializeFromCreateArgs(
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __out_opt IBootstrapperEngine** ppEngine
+    )
+{
+    HRESULT hr = S_OK;
+    IBootstrapperEngine* pEngine = NULL;
+
+    hr = BalBootstrapperEngineCreate(pArgs->pfnBootstrapperEngineProc, pArgs->pvBootstrapperEngineProcContext, &pEngine);
+    ExitOnFailure(hr, "Failed to create BalBootstrapperEngine.");
+
+    BalInitialize(pEngine);
+
+    if (ppEngine)
+    {
+        *ppEngine = pEngine;
+    }
+    pEngine = NULL;
+
+LExit:
+    ReleaseObject(pEngine);
+
+    return hr;
+}
+
+
+DAPI_(void) BalUninitialize()
+{
+    ReleaseNullObject(vpEngine);
+}
+
+
+DAPI_(HRESULT) BalManifestLoad(
+    __in HMODULE hBootstrapperApplicationModule,
+    __out IXMLDOMDocument** ppixdManifest
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczPath = NULL;
+
+    hr = PathRelativeToModule(&sczPath, BAL_MANIFEST_FILENAME, hBootstrapperApplicationModule);
+    ExitOnFailure(hr, "Failed to get path to bootstrapper application manifest: %ls", BAL_MANIFEST_FILENAME);
+
+    hr = XmlLoadDocumentFromFile(sczPath, ppixdManifest);
+    ExitOnFailure(hr, "Failed to load bootstrapper application manifest '%ls' from path: %ls", BAL_MANIFEST_FILENAME, sczPath);
+
+LExit:
+    ReleaseStr(sczPath);
+    return hr;
+}
+
+
+DAPI_(HRESULT) BalEvaluateCondition(
+    __in_z LPCWSTR wzCondition,
+    __out BOOL* pf
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    hr = vpEngine->EvaluateCondition(wzCondition, pf);
+
+LExit:
+    return hr;
+}
+
+
+// The contents of psczOut may be sensitive, should keep encrypted and SecureZeroFree.
+DAPI_(HRESULT) BalFormatString(
+    __in_z LPCWSTR wzFormat,
+    __inout LPWSTR* psczOut
+    )
+{
+    HRESULT hr = S_OK;
+    DWORD cch = 0;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    if (*psczOut)
+    {
+        hr = StrMaxLength(*psczOut, reinterpret_cast<DWORD_PTR*>(&cch));
+        ExitOnFailure(hr, "Failed to determine length of value.");
+    }
+
+    hr = vpEngine->FormatString(wzFormat, *psczOut, &cch);
+    if (E_MOREDATA == hr)
+    {
+        ++cch;
+
+        hr = StrAllocSecure(psczOut, cch);
+        ExitOnFailure(hr, "Failed to allocate value.");
+
+        hr = vpEngine->FormatString(wzFormat, *psczOut, &cch);
+    }
+
+LExit:
+    return hr;
+}
+
+
+// The contents of pllValue may be sensitive, if variable is hidden should keep value encrypted and SecureZeroMemory.
+DAPI_(HRESULT) BalGetNumericVariable(
+    __in_z LPCWSTR wzVariable,
+    __out LONGLONG* pllValue
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    hr = vpEngine->GetVariableNumeric(wzVariable, pllValue);
+
+LExit:
+    return hr;
+}
+
+
+DAPI_(HRESULT) BalSetNumericVariable(
+    __in_z LPCWSTR wzVariable,
+    __in LONGLONG llValue
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    hr = vpEngine->SetVariableNumeric(wzVariable, llValue);
+
+LExit:
+    return hr;
+}
+
+
+DAPI_(BOOL) BalStringVariableExists(
+    __in_z LPCWSTR wzVariable
+    )
+{
+    HRESULT hr = S_OK;
+    DWORD cch = 0;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    hr = vpEngine->GetVariableString(wzVariable, NULL, &cch);
+
+LExit:
+    return E_MOREDATA == hr; // string exists only if there are more than zero characters in the variable.
+}
+
+
+// The contents of psczValue may be sensitive, if variable is hidden should keep value encrypted and SecureZeroFree.
+DAPI_(HRESULT) BalGetStringVariable(
+    __in_z LPCWSTR wzVariable,
+    __inout LPWSTR* psczValue
+    )
+{
+    HRESULT hr = S_OK;
+    DWORD cch = 0;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    if (*psczValue)
+    {
+        hr = StrMaxLength(*psczValue, reinterpret_cast<DWORD_PTR*>(&cch));
+        ExitOnFailure(hr, "Failed to determine length of value.");
+    }
+
+    hr = vpEngine->GetVariableString(wzVariable, *psczValue, &cch);
+    if (E_MOREDATA == hr)
+    {
+        ++cch;
+
+        hr = StrAllocSecure(psczValue, cch);
+        ExitOnFailure(hr, "Failed to allocate value.");
+
+        hr = vpEngine->GetVariableString(wzVariable, *psczValue, &cch);
+    }
+
+LExit:
+    return hr;
+}
+
+DAPI_(HRESULT) BalSetStringVariable(
+    __in_z LPCWSTR wzVariable,
+    __in_z_opt LPCWSTR wzValue
+    )
+{
+    HRESULT hr = S_OK;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    hr = vpEngine->SetVariableString(wzVariable, wzValue);
+
+LExit:
+    return hr;
+}
+
+
+DAPIV_(HRESULT) BalLog(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+    va_list args;
+    LPSTR sczFormattedAnsi = NULL;
+    LPWSTR sczMessage = NULL;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    va_start(args, szFormat);
+    hr = StrAnsiAllocFormattedArgs(&sczFormattedAnsi, szFormat, args);
+    va_end(args);
+    ExitOnFailure(hr, "Failed to format log string.");
+
+    hr = StrAllocStringAnsi(&sczMessage, sczFormattedAnsi, 0, CP_UTF8);
+    ExitOnFailure(hr, "Failed to convert log string to Unicode.");
+
+    hr = vpEngine->Log(level, sczMessage);
+
+LExit:
+    ReleaseStr(sczMessage);
+    ReleaseStr(sczFormattedAnsi);
+    return hr;
+}
+
+
+DAPIV_(HRESULT) BalLogError(
+    __in HRESULT hrError,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+    va_list args;
+    LPSTR sczFormattedAnsi = NULL;
+    LPWSTR sczMessage = NULL;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    va_start(args, szFormat);
+    hr = StrAnsiAllocFormattedArgs(&sczFormattedAnsi, szFormat, args);
+    va_end(args);
+    ExitOnFailure(hr, "Failed to format error log string.");
+
+    hr = StrAllocFormatted(&sczMessage, L"Error 0x%08x: %S", hrError, sczFormattedAnsi);
+    ExitOnFailure(hr, "Failed to prepend error number to error log string.");
+
+    hr = vpEngine->Log(BOOTSTRAPPER_LOG_LEVEL_ERROR, sczMessage);
+
+LExit:
+    ReleaseStr(sczMessage);
+    ReleaseStr(sczFormattedAnsi);
+    return hr;
+}
+
+DAPIV_(HRESULT) BalLogId(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in DWORD dwLogId,
+    __in HMODULE hModule,
+    ...
+    )
+{
+    HRESULT hr = S_OK;
+    va_list args;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    va_start(args, hModule);
+    hr = BalLogIdArgs(level, dwLogId, hModule, args);
+    va_end(args);
+
+LExit:
+    return hr;
+}
+
+DAPI_(HRESULT) BalLogIdArgs(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in DWORD dwLogId,
+    __in HMODULE hModule,
+    __in va_list args
+    )
+{
+
+    HRESULT hr = S_OK;
+    LPWSTR pwz = NULL;
+    DWORD cch = 0;
+
+    if (!vpEngine)
+    {
+        hr = E_POINTER;
+        ExitOnRootFailure(hr, "BalInitialize() must be called first.");
+    }
+
+    // Get the string for the id.
+#pragma prefast(push)
+#pragma prefast(disable:25028)
+#pragma prefast(disable:25068)
+    cch = ::FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_HMODULE,
+        static_cast<LPCVOID>(hModule), dwLogId, 0, reinterpret_cast<LPWSTR>(&pwz), 0, &args);
+#pragma prefast(pop)
+
+    if (0 == cch)
+    {
+        ExitOnLastError(hr, "Failed to log id: %d", dwLogId);
+    }
+
+    if (2 <= cch && L'\r' == pwz[cch - 2] && L'\n' == pwz[cch - 1])
+    {
+        pwz[cch - 2] = L'\0'; // remove newline from message table.
+    }
+
+    hr = vpEngine->Log(level, pwz);
+
+LExit:
+    if (pwz)
+    {
+        ::LocalFree(pwz);
+    }
+
+    return hr;
+}
diff --git a/src/balutil/inc/BAFunctions.h b/src/balutil/inc/BAFunctions.h
new file mode 100644
index 00000000..1338253d
--- /dev/null
+++ b/src/balutil/inc/BAFunctions.h
@@ -0,0 +1,130 @@
+#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.
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// The first 1024 messages are reserved so that the BA messages have the same value here.
+enum BA_FUNCTIONS_MESSAGE
+{
+    BA_FUNCTIONS_MESSAGE_ONDETECTBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONDETECTCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONPLANBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONPLANCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONSTARTUP = BOOTSTRAPPER_APPLICATION_MESSAGE_ONSTARTUP,
+    BA_FUNCTIONS_MESSAGE_ONSHUTDOWN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONSHUTDOWN,
+    BA_FUNCTIONS_MESSAGE_ONSYSTEMSHUTDOWN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONSYSTEMSHUTDOWN,
+    BA_FUNCTIONS_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTUPDATEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONDETECTUPDATE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTUPDATECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDBUNDLE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDBUNDLE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONDETECTCOMPATIBLEMSIPACKAGE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTCOMPATIBLEMSIPACKAGE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDMSIPACKAGE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDMSIPACKAGE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTTARGETMSIPACKAGE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTTARGETMSIPACKAGE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTMSIFEATURE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTMSIFEATURE,
+    BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONPLANRELATEDBUNDLE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANRELATEDBUNDLE,
+    BA_FUNCTIONS_MESSAGE_ONPLANPACKAGEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONPLANTARGETMSIPACKAGE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANTARGETMSIPACKAGE,
+    BA_FUNCTIONS_MESSAGE_ONPLANMSIFEATURE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANMSIFEATURE,
+    BA_FUNCTIONS_MESSAGE_ONPLANPACKAGECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONAPPLYBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONELEVATEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONELEVATECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONPROGRESS = BOOTSTRAPPER_APPLICATION_MESSAGE_ONPROGRESS,
+    BA_FUNCTIONS_MESSAGE_ONERROR = BOOTSTRAPPER_APPLICATION_MESSAGE_ONERROR,
+    BA_FUNCTIONS_MESSAGE_ONREGISTERBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONREGISTERCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONCACHEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREPROGRESS = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREPROGRESS,
+    BA_FUNCTIONS_MESSAGE_ONRESOLVESOURCE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONRESOLVESOURCE,
+    BA_FUNCTIONS_MESSAGE_ONCACHEACQUIRECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIRECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONCACHECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEPATCHTARGET = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPATCHTARGET,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEPROGRESS = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPROGRESS,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEMSIMESSAGE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEMSIMESSAGE,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEFILESINUSE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEFILESINUSE,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONEXECUTECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTECOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONUNREGISTERBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONUNREGISTERCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONAPPLYCOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYCOMPLETE,
+    BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN = BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN,
+    BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE = BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE,
+
+    BA_FUNCTIONS_MESSAGE_ONTHEMELOADED = 1024,
+    BA_FUNCTIONS_MESSAGE_WNDPROC,
+};
+
+typedef HRESULT(WINAPI *PFN_BA_FUNCTIONS_PROC)(
+    __in BA_FUNCTIONS_MESSAGE message,
+    __in const LPVOID pvArgs,
+    __inout LPVOID pvResults,
+    __in_opt LPVOID pvContext
+    );
+
+struct BA_FUNCTIONS_CREATE_ARGS
+{
+    DWORD cbSize;
+    DWORD64 qwBAFunctionsAPIVersion;
+    BOOTSTRAPPER_CREATE_ARGS* pBootstrapperCreateArgs;
+};
+
+struct BA_FUNCTIONS_CREATE_RESULTS
+{
+    DWORD cbSize;
+    PFN_BA_FUNCTIONS_PROC pfnBAFunctionsProc;
+    LPVOID pvBAFunctionsProcContext;
+};
+
+struct BA_FUNCTIONS_ONTHEMELOADED_ARGS
+{
+    DWORD cbSize;
+    THEME* pTheme;
+    WIX_LOCALIZATION* pWixLoc;
+};
+
+struct BA_FUNCTIONS_ONTHEMELOADED_RESULTS
+{
+    DWORD cbSize;
+};
+
+struct BA_FUNCTIONS_WNDPROC_ARGS
+{
+    DWORD cbSize;
+    THEME* pTheme;
+    HWND hWnd;
+    UINT uMsg;
+    WPARAM wParam;
+    LPARAM lParam;
+};
+
+struct BA_FUNCTIONS_WNDPROC_RESULTS
+{
+    DWORD cbSize;
+    LRESULT lres;
+};
+
+typedef HRESULT(WINAPI *PFN_BA_FUNCTIONS_CREATE)(
+    __in const BA_FUNCTIONS_CREATE_ARGS* pArgs,
+    __inout BA_FUNCTIONS_CREATE_RESULTS* pResults
+    );
+
+typedef void (WINAPI *PFN_BA_FUNCTIONS_DESTROY)();
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/inc/BalBaseBAFunctions.h b/src/balutil/inc/BalBaseBAFunctions.h
new file mode 100644
index 00000000..dd190ee9
--- /dev/null
+++ b/src/balutil/inc/BalBaseBAFunctions.h
@@ -0,0 +1,700 @@
+#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 "locutil.h"
+#include "thmutil.h"
+#include "BAFunctions.h"
+#include "IBAFunctions.h"
+#include "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+
+class CBalBaseBAFunctions : public IBAFunctions
+{
+public: // IUnknown
+    virtual STDMETHODIMP QueryInterface(
+        __in REFIID riid,
+        __out LPVOID *ppvObject
+        )
+    {
+        if (!ppvObject)
+        {
+            return E_INVALIDARG;
+        }
+
+        *ppvObject = NULL;
+
+        if (::IsEqualIID(__uuidof(IBAFunctions), riid))
+        {
+            *ppvObject = static_cast<IBAFunctions*>(this);
+        }
+        else if (::IsEqualIID(__uuidof(IBootstrapperApplication), riid))
+        {
+            *ppvObject = static_cast<IBootstrapperApplication*>(this);
+        }
+        else if (::IsEqualIID(IID_IUnknown, riid))
+        {
+            *ppvObject = static_cast<IUnknown*>(this);
+        }
+        else // no interface for requested iid
+        {
+            return E_NOINTERFACE;
+        }
+
+        AddRef();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP_(ULONG) AddRef()
+    {
+        return ::InterlockedIncrement(&this->m_cReferences);
+    }
+
+    virtual STDMETHODIMP_(ULONG) Release()
+    {
+        long l = ::InterlockedDecrement(&this->m_cReferences);
+        if (0 < l)
+        {
+            return l;
+        }
+
+        delete this;
+        return 0;
+    }
+
+public: // IBootstrapperApplication
+    virtual STDMETHODIMP OnStartup()
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnShutdown(
+        __inout BOOTSTRAPPER_SHUTDOWN_ACTION* /*pAction*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnSystemShutdown(
+        __in DWORD /*dwEndSession*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectBegin(
+        __in BOOL /*fInstalled*/,
+        __in DWORD /*cPackages*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectForwardCompatibleBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_RELATION_TYPE /*relationType*/,
+        __in_z LPCWSTR /*wzBundleTag*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __inout BOOL* /*pfCancel*/,
+        __inout BOOL* /*pfIgnoreBundle*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdateBegin(
+        __in_z LPCWSTR /*wzUpdateLocation*/,
+        __inout BOOL* /*pfCancel*/,
+        __inout BOOL* /*pfSkip*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdate(
+        __in_z LPCWSTR /*wzUpdateLocation*/,
+        __in DWORD64 /*dw64Size*/,
+        __in DWORD64 /*dw64Version*/,
+        __in_z LPCWSTR /*wzTitle*/,
+        __in_z LPCWSTR /*wzSummary*/,
+        __in_z LPCWSTR /*wzContentType*/,
+        __in_z LPCWSTR /*wzContent*/,
+        __inout BOOL* /*pfCancel*/,
+        __inout BOOL* /*pfStopProcessingUpdates*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdateComplete(
+        __in HRESULT /*hrStatus*/,
+        __inout BOOL* /*pfIgnoreError*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectRelatedBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_RELATION_TYPE /*relationType*/,
+        __in_z LPCWSTR /*wzBundleTag*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __in BOOTSTRAPPER_RELATED_OPERATION /*operation*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectCompatibleMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in DWORD64 /*dw64CompatiblePackageVersion*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectRelatedMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzUpgradeCode*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __in BOOTSTRAPPER_RELATED_OPERATION /*operation*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectTargetMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*patchState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectMsiFeature(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzFeatureId*/,
+        __in BOOTSTRAPPER_FEATURE_STATE /*state*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanBegin(
+        __in DWORD /*cPackages*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanRelatedBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanCompatibleMsiPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in DWORD64 /*dw64CompatiblePackageVersion*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanCompatibleMsiPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*requested*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*execute*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*rollback*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanTargetMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanMsiFeature(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzFeatureId*/,
+        __in BOOTSTRAPPER_FEATURE_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_FEATURE_STATE* /*pRequestedState*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*requested*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*execute*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*rollback*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnApplyBegin(
+        __in DWORD /*dwPhaseCount*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnElevateBegin(
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnElevateComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnProgress(
+        __in DWORD /*dwProgressPercentage*/,
+        __in DWORD /*dwOverallProgressPercentage*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return IDNOACTION;
+    }
+
+    virtual STDMETHODIMP OnError(
+        __in BOOTSTRAPPER_ERROR_TYPE /*errorType*/,
+        __in_z 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*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnRegisterBegin(
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnRegisterComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheBegin(
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCachePackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*cCachePayloads*/,
+        __in DWORD64 /*dw64PackageCacheSize*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheAcquireBegin(
+        __in_z LPCWSTR /*wzPackageOrContainerId*/,
+        __in_z_opt LPCWSTR /*wzPayloadId*/,
+        __in BOOTSTRAPPER_CACHE_OPERATION /*operation*/,
+        __in_z LPCWSTR /*wzSource*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheAcquireProgress(
+        __in_z LPCWSTR /*wzPackageOrContainerId*/,
+        __in_z_opt LPCWSTR /*wzPayloadId*/,
+        __in DWORD64 /*dw64Progress*/,
+        __in DWORD64 /*dw64Total*/,
+        __in DWORD /*dwOverallPercentage*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnResolveSource(
+        __in_z LPCWSTR /*wzPackageOrContainerId*/,
+        __in_z_opt LPCWSTR /*wzPayloadId*/,
+        __in_z LPCWSTR /*wzLocalSource*/,
+        __in_z_opt LPCWSTR /*wzDownloadSource*/,
+        __in BOOTSTRAPPER_RESOLVESOURCE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_RESOLVESOURCE_ACTION* /*pAction*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    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*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheVerifyBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzPayloadId*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheVerifyComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzPayloadId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION* /*pAction*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCachePackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_CACHEPACKAGECOMPLETE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_CACHEPACKAGECOMPLETE_ACTION* /*pAction*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteBegin(
+        __in DWORD /*cExecutingPackages*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecutePackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in BOOL /*fExecute*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecutePatchTarget(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzTargetProductCode*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteProgress(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*dwProgressPercentage*/,
+        __in DWORD /*dwOverallProgressPercentage*/,
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    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*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteFilesInUse(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*cFiles*/,
+        __in_ecount_z(cFiles) LPCWSTR* /*rgwzFiles*/,
+        __in int /*nRecommendation*/,
+        __inout int* /*pResult*/
+        )
+    {
+        return S_OK;
+    }
+
+    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*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnUnregisterBegin(
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnUnregisterComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnApplyComplete(
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_APPLY_RESTART /*restart*/,
+        __in BOOTSTRAPPER_APPLYCOMPLETE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_APPLYCOMPLETE_ACTION* /*pAction*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnLaunchApprovedExeBegin(
+        __inout BOOL* /*pfCancel*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnLaunchApprovedExeComplete(
+        __in HRESULT /*hrStatus*/,
+        __in DWORD /*dwProcessId*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP_(HRESULT) BAProc(
+        __in BOOTSTRAPPER_APPLICATION_MESSAGE /*message*/,
+        __in const LPVOID /*pvArgs*/,
+        __inout LPVOID /*pvResults*/,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+    virtual STDMETHODIMP_(void) BAProcFallback(
+        __in BOOTSTRAPPER_APPLICATION_MESSAGE /*message*/,
+        __in const LPVOID /*pvArgs*/,
+        __inout LPVOID /*pvResults*/,
+        __inout HRESULT* /*phr*/,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+    }
+
+public: // IBAFunctions
+    virtual STDMETHODIMP OnPlan(
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnThemeLoaded(
+        THEME* pTheme,
+        WIX_LOCALIZATION* pWixLoc
+        )
+    {
+        HRESULT hr = S_OK;
+
+        m_pTheme = pTheme;
+        m_pWixLoc = pWixLoc;
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP WndProc(
+        __in THEME* pTheme,
+        __in HWND hWnd,
+        __in UINT uMsg,
+        __in WPARAM wParam,
+        __in LPARAM lParam,
+        __inout LRESULT* plRes
+        )
+    {
+        HRESULT hr = S_OK;
+
+        *plRes = ThemeDefWindowProc(pTheme, hWnd, uMsg, wParam, lParam);
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP BAFunctionsProc(
+        __in BA_FUNCTIONS_MESSAGE /*message*/,
+        __in const LPVOID /*pvArgs*/,
+        __inout LPVOID /*pvResults*/,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+protected:
+    CBalBaseBAFunctions(
+        __in HMODULE hModule,
+        __in IBootstrapperEngine* pEngine,
+        __in const BA_FUNCTIONS_CREATE_ARGS* pArgs
+        )
+    {
+        m_cReferences = 1;
+        m_hModule = hModule;
+        pEngine->AddRef();
+        m_pEngine = pEngine;
+
+        memcpy_s(&m_command, sizeof(m_command), pArgs->pBootstrapperCreateArgs->pCommand, sizeof(BOOTSTRAPPER_COMMAND));
+        memcpy_s(&m_baCreateArgs, sizeof(m_baCreateArgs), pArgs->pBootstrapperCreateArgs, sizeof(BOOTSTRAPPER_CREATE_ARGS));
+        memcpy_s(&m_bafCreateArgs, sizeof(m_bafCreateArgs), pArgs, sizeof(BA_FUNCTIONS_CREATE_ARGS));
+        m_baCreateArgs.pCommand = &m_command;
+        m_bafCreateArgs.pBootstrapperCreateArgs = &m_baCreateArgs;
+    }
+
+    virtual ~CBalBaseBAFunctions()
+    {
+        ReleaseNullObject(m_pEngine);
+    }
+
+private:
+    long m_cReferences;
+
+protected:
+    IBootstrapperEngine* m_pEngine;
+    HMODULE m_hModule;
+    BA_FUNCTIONS_CREATE_ARGS m_bafCreateArgs;
+    BOOTSTRAPPER_CREATE_ARGS m_baCreateArgs;
+    BOOTSTRAPPER_COMMAND m_command;
+    THEME* m_pTheme;
+    WIX_LOCALIZATION* m_pWixLoc;
+};
diff --git a/src/balutil/inc/BalBaseBAFunctionsProc.h b/src/balutil/inc/BalBaseBAFunctionsProc.h
new file mode 100644
index 00000000..da0a71f7
--- /dev/null
+++ b/src/balutil/inc/BalBaseBAFunctionsProc.h
@@ -0,0 +1,114 @@
+#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 "BalBaseBootstrapperApplicationProc.h"
+#include "BAFunctions.h"
+#include "IBAFunctions.h"
+
+static HRESULT BalBaseBAFunctionsProcOnThemeLoaded(
+    __in IBAFunctions* pBAFunctions,
+    __in BA_FUNCTIONS_ONTHEMELOADED_ARGS* pArgs,
+    __inout BA_FUNCTIONS_ONTHEMELOADED_RESULTS* /*pResults*/
+    )
+{
+    return pBAFunctions->OnThemeLoaded(pArgs->pTheme, pArgs->pWixLoc);
+}
+
+static HRESULT BalBaseBAFunctionsProcWndProc(
+    __in IBAFunctions* pBAFunctions,
+    __in BA_FUNCTIONS_WNDPROC_ARGS* pArgs,
+    __inout BA_FUNCTIONS_WNDPROC_RESULTS* pResults
+    )
+{
+    return pBAFunctions->WndProc(pArgs->pTheme, pArgs->hWnd, pArgs->uMsg, pArgs->wParam, pArgs->lParam, &pResults->lres);
+}
+
+/*******************************************************************
+BalBaseBAFunctionsProc - requires pvContext to be of type IBAFunctions.
+Provides a default mapping between the message based BAFunctions interface and
+the COM-based BAFunctions interface.
+
+*******************************************************************/
+static HRESULT WINAPI BalBaseBAFunctionsProc(
+    __in BA_FUNCTIONS_MESSAGE message,
+    __in const LPVOID pvArgs,
+    __inout LPVOID pvResults,
+    __in_opt LPVOID pvContext
+    )
+{
+    IBAFunctions* pBAFunctions = reinterpret_cast<IBAFunctions*>(pvContext);
+    HRESULT hr = pBAFunctions->BAFunctionsProc(message, pvArgs, pvResults, pvContext);
+
+    if (E_NOTIMPL == hr)
+    {
+        switch (message)
+        {
+        case BA_FUNCTIONS_MESSAGE_ONDETECTBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONPLANCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONSTARTUP:
+        case BA_FUNCTIONS_MESSAGE_ONSHUTDOWN:
+        case BA_FUNCTIONS_MESSAGE_ONSYSTEMSHUTDOWN:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTUPDATEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTUPDATE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTUPDATECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDBUNDLE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTCOMPATIBLEMSIPACKAGE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTRELATEDMSIPACKAGE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTTARGETMSIPACKAGE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTMSIFEATURE:
+        case BA_FUNCTIONS_MESSAGE_ONDETECTPACKAGECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANRELATEDBUNDLE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANPACKAGEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANTARGETMSIPACKAGE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANMSIFEATURE:
+        case BA_FUNCTIONS_MESSAGE_ONPLANPACKAGECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONAPPLYBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONELEVATEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONELEVATECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONPROGRESS:
+        case BA_FUNCTIONS_MESSAGE_ONERROR:
+        case BA_FUNCTIONS_MESSAGE_ONREGISTERBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONREGISTERCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEACQUIREPROGRESS:
+        case BA_FUNCTIONS_MESSAGE_ONRESOLVESOURCE:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEACQUIRECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEVERIFYCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONCACHEPACKAGECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONCACHECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEPATCHTARGET:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEPROGRESS:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEMSIMESSAGE:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEFILESINUSE:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTEPACKAGECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONEXECUTECOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONUNREGISTERBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONUNREGISTERCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONAPPLYCOMPLETE:
+        case BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN:
+        case BA_FUNCTIONS_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE:
+            hr = BalBaseBootstrapperApplicationProc((BOOTSTRAPPER_APPLICATION_MESSAGE)message, pvArgs, pvResults, pvContext);
+            break;
+        case BA_FUNCTIONS_MESSAGE_ONTHEMELOADED:
+            hr = BalBaseBAFunctionsProcOnThemeLoaded(pBAFunctions, reinterpret_cast<BA_FUNCTIONS_ONTHEMELOADED_ARGS*>(pvArgs), reinterpret_cast<BA_FUNCTIONS_ONTHEMELOADED_RESULTS*>(pvResults));
+            break;
+        case BA_FUNCTIONS_MESSAGE_WNDPROC:
+            hr = BalBaseBAFunctionsProcWndProc(pBAFunctions, reinterpret_cast<BA_FUNCTIONS_WNDPROC_ARGS*>(pvArgs), reinterpret_cast<BA_FUNCTIONS_WNDPROC_RESULTS*>(pvResults));
+            break;
+        }
+    }
+
+    return hr;
+}
diff --git a/src/balutil/inc/BalBaseBootstrapperApplication.h b/src/balutil/inc/BalBaseBootstrapperApplication.h
new file mode 100644
index 00000000..ac354e7b
--- /dev/null
+++ b/src/balutil/inc/BalBaseBootstrapperApplication.h
@@ -0,0 +1,900 @@
+// 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 "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+
+#include "balutil.h"
+#include "balretry.h"
+
+class CBalBaseBootstrapperApplication : public IBootstrapperApplication
+{
+public: // IUnknown
+    virtual STDMETHODIMP QueryInterface(
+        __in REFIID riid,
+        __out LPVOID *ppvObject
+        )
+    {
+        if (!ppvObject)
+        {
+            return E_INVALIDARG;
+        }
+
+        *ppvObject = NULL;
+
+        if (::IsEqualIID(__uuidof(IBootstrapperApplication), riid))
+        {
+            *ppvObject = static_cast<IBootstrapperApplication*>(this);
+        }
+        else if (::IsEqualIID(IID_IUnknown, riid))
+        {
+            *ppvObject = static_cast<IUnknown*>(this);
+        }
+        else // no interface for requested iid
+        {
+            return E_NOINTERFACE;
+        }
+
+        AddRef();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP_(ULONG) AddRef()
+    {
+        return ::InterlockedIncrement(&this->m_cReferences);
+    }
+
+    virtual STDMETHODIMP_(ULONG) Release()
+    {
+        long l = ::InterlockedDecrement(&this->m_cReferences);
+        if (0 < l)
+        {
+            return l;
+        }
+
+        delete this;
+        return 0;
+    }
+
+public: // IBootstrapperApplication
+    virtual STDMETHODIMP OnStartup()
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnShutdown(
+        __inout BOOTSTRAPPER_SHUTDOWN_ACTION* /*pAction*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnSystemShutdown(
+        __in DWORD dwEndSession,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+
+        // Allow requests to shut down when critical or not applying.
+        *pfCancel = !(ENDSESSION_CRITICAL & dwEndSession || !m_fApplying);
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnDetectBegin(
+        __in BOOL /*fInstalled*/,
+        __in DWORD /*cPackages*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectForwardCompatibleBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_RELATION_TYPE /*relationType*/,
+        __in_z LPCWSTR /*wzBundleTag*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __inout BOOL* pfCancel,
+        __inout BOOL* /*pfIgnoreBundle*/
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdateBegin(
+        __in_z LPCWSTR /*wzUpdateLocation*/,
+        __inout BOOL* pfCancel,
+        __inout BOOL* /*pfSkip*/
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdate(
+        __in_z LPCWSTR /*wzUpdateLocation*/,
+        __in DWORD64 /*dw64Size*/,
+        __in DWORD64 /*dw64Version*/,
+        __in_z LPCWSTR /*wzTitle*/,
+        __in_z LPCWSTR /*wzSummary*/,
+        __in_z LPCWSTR /*wzContentType*/,
+        __in_z LPCWSTR /*wzContent*/,
+        __inout BOOL* pfCancel,
+        __inout BOOL* /*pfStopProcessingUpdates*/
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectUpdateComplete(
+        __in HRESULT /*hrStatus*/,
+        __inout BOOL* /*pfIgnoreError*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectRelatedBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_RELATION_TYPE /*relationType*/,
+        __in_z LPCWSTR /*wzBundleTag*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __in BOOTSTRAPPER_RELATED_OPERATION /*operation*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectCompatibleMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in DWORD64 /*dw64CompatiblePackageVersion*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectRelatedMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzUpgradeCode*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOL /*fPerMachine*/,
+        __in DWORD64 /*dw64Version*/,
+        __in BOOTSTRAPPER_RELATED_OPERATION /*operation*/,
+        __inout BOOL* pfCancel
+        ) 
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectTargetMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*patchState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectMsiFeature(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzFeatureId*/,
+        __in BOOTSTRAPPER_FEATURE_STATE /*state*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnDetectComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanBegin(
+        __in DWORD /*cPackages*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanRelatedBundle(
+        __in_z LPCWSTR /*wzBundleId*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanCompatibleMsiPackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in DWORD64 /*dw64CompatiblePackageVersion*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanCompatibleMsiPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzCompatiblePackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*requested*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*execute*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*rollback*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanTargetMsiPackage(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzProductCode*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_REQUEST_STATE* /*pRequestedState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanMsiFeature(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzFeatureId*/,
+        __in BOOTSTRAPPER_FEATURE_STATE /*recommendedState*/,
+        __inout BOOTSTRAPPER_FEATURE_STATE* /*pRequestedState*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanPackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_PACKAGE_STATE /*state*/,
+        __in BOOTSTRAPPER_REQUEST_STATE /*requested*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*execute*/,
+        __in BOOTSTRAPPER_ACTION_STATE /*rollback*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnPlanComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnApplyBegin(
+        __in DWORD /*dwPhaseCount*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        m_fApplying = TRUE;
+
+        m_dwProgressPercentage = 0;
+        m_dwOverallProgressPercentage = 0;
+
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnElevateBegin(
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnElevateComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnProgress(
+        __in DWORD dwProgressPercentage,
+        __in DWORD dwOverallProgressPercentage,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+        int nResult = IDNOACTION;
+
+        m_dwProgressPercentage = dwProgressPercentage;
+        m_dwOverallProgressPercentage = dwOverallProgressPercentage;
+
+        if (BOOTSTRAPPER_DISPLAY_EMBEDDED == m_display)
+        {
+            hr = m_pEngine->SendEmbeddedProgress(m_dwProgressPercentage, m_dwOverallProgressPercentage, &nResult);
+            BalExitOnFailure(hr, "Failed to send embedded overall progress.");
+
+            if (IDERROR == nResult)
+            {
+                hr = E_FAIL;
+            }
+            else if (IDCANCEL == nResult)
+            {
+                *pfCancel = TRUE;
+            }
+        }
+
+    LExit:
+        *pfCancel |= CheckCanceled();
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnError(
+        __in BOOTSTRAPPER_ERROR_TYPE errorType,
+        __in_z 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
+        )
+    {
+        BalRetryErrorOccurred(wzPackageId, dwCode);
+
+        if (CheckCanceled())
+        {
+            *pResult = IDCANCEL;
+        }
+        else if (BOOTSTRAPPER_DISPLAY_FULL == m_display)
+        {
+            if (BOOTSTRAPPER_ERROR_TYPE_HTTP_AUTH_SERVER == errorType || BOOTSTRAPPER_ERROR_TYPE_HTTP_AUTH_PROXY == errorType)
+            {
+                *pResult = IDTRYAGAIN;
+            }
+        }
+
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnRegisterBegin(
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnRegisterComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheBegin(
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCachePackageBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*cCachePayloads*/,
+        __in DWORD64 /*dw64PackageCacheSize*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheAcquireBegin(
+        __in_z LPCWSTR wzPackageOrContainerId,
+        __in_z_opt LPCWSTR wzPayloadId,
+        __in BOOTSTRAPPER_CACHE_OPERATION /*operation*/,
+        __in_z LPCWSTR /*wzSource*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        BalRetryStartPackage(BALRETRY_TYPE_CACHE, wzPackageOrContainerId, wzPayloadId);
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheAcquireProgress(
+        __in_z LPCWSTR /*wzPackageOrContainerId*/,
+        __in_z_opt LPCWSTR /*wzPayloadId*/,
+        __in DWORD64 /*dw64Progress*/,
+        __in DWORD64 /*dw64Total*/,
+        __in DWORD /*dwOverallPercentage*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+        int nResult = IDNOACTION;
+
+        // Send progress even though we don't update the numbers to at least give the caller an opportunity
+        // to cancel.
+        if (BOOTSTRAPPER_DISPLAY_EMBEDDED == m_display)
+        {
+            hr = m_pEngine->SendEmbeddedProgress(m_dwProgressPercentage, m_dwOverallProgressPercentage, &nResult);
+            BalExitOnFailure(hr, "Failed to send embedded cache progress.");
+
+            if (IDERROR == nResult)
+            {
+                hr = E_FAIL;
+            }
+            else if (IDCANCEL == nResult)
+            {
+                *pfCancel = TRUE;
+            }
+        }
+
+    LExit:
+        *pfCancel |= CheckCanceled();
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnResolveSource(
+        __in_z LPCWSTR /*wzPackageOrContainerId*/,
+        __in_z_opt LPCWSTR /*wzPayloadId*/,
+        __in_z LPCWSTR /*wzLocalSource*/,
+        __in_z_opt LPCWSTR /*wzDownloadSource*/,
+        __in BOOTSTRAPPER_RESOLVESOURCE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_RESOLVESOURCE_ACTION* /*pAction*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    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
+        )
+    {
+        HRESULT hr = S_OK;
+        BOOL fRetry = FALSE;
+
+        if (CheckCanceled())
+        {
+            ExitFunction1(hr = HRESULT_FROM_WIN32(ERROR_INSTALL_USEREXIT));
+        }
+
+        hr = BalRetryEndPackage(BALRETRY_TYPE_CACHE, wzPackageOrContainerId, wzPayloadId, hrStatus, &fRetry);
+        ExitOnFailure(hr, "BalRetryEndPackage for cache failed");
+
+        if (fRetry)
+        {
+            *pAction = BOOTSTRAPPER_CACHEACQUIRECOMPLETE_ACTION_RETRY;
+        }
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnCacheVerifyBegin(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzPayloadId*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheVerifyComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzPayloadId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION* pAction
+        )
+    {
+        if (CheckCanceled())
+        {
+            *pAction = BOOTSTRAPPER_CACHEVERIFYCOMPLETE_ACTION_NONE;
+        }
+
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCachePackageComplete(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in HRESULT /*hrStatus*/,
+        __in BOOTSTRAPPER_CACHEPACKAGECOMPLETE_ACTION /*recommendation*/,
+        __inout BOOTSTRAPPER_CACHEPACKAGECOMPLETE_ACTION* pAction
+        )
+    {
+        if (CheckCanceled())
+        {
+            *pAction = BOOTSTRAPPER_CACHEPACKAGECOMPLETE_ACTION_NONE;
+        }
+
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnCacheComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteBegin(
+        __in DWORD /*cExecutingPackages*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecutePackageBegin(
+        __in_z LPCWSTR wzPackageId,
+        __in BOOL fExecute,
+        __inout BOOL* pfCancel
+        )
+    {
+        // Only track retry on execution (not rollback).
+        if (fExecute)
+        {
+            BalRetryStartPackage(BALRETRY_TYPE_EXECUTE, wzPackageId, NULL);
+        }
+
+        m_fRollingBack = !fExecute;
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecutePatchTarget(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in_z LPCWSTR /*wzTargetProductCode*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteProgress(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*dwProgressPercentage*/,
+        __in DWORD /*dwOverallProgressPercentage*/,
+        __inout BOOL* pfCancel
+        )
+    {
+        HRESULT hr = S_OK;
+        int nResult = IDNOACTION;
+
+        // Send progress even though we don't update the numbers to at least give the caller an opportunity
+        // to cancel.
+        if (BOOTSTRAPPER_DISPLAY_EMBEDDED == m_display)
+        {
+            hr = m_pEngine->SendEmbeddedProgress(m_dwProgressPercentage, m_dwOverallProgressPercentage, &nResult);
+            BalExitOnFailure(hr, "Failed to send embedded execute progress.");
+
+            if (IDERROR == nResult)
+            {
+                hr = E_FAIL;
+            }
+            else if (IDCANCEL == nResult)
+            {
+                *pfCancel = TRUE;
+            }
+        }
+
+    LExit:
+        *pfCancel |= CheckCanceled();
+        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
+        )
+    {
+        if (CheckCanceled())
+        {
+            *pResult = IDCANCEL;
+        }
+
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnExecuteFilesInUse(
+        __in_z LPCWSTR /*wzPackageId*/,
+        __in DWORD /*cFiles*/,
+        __in_ecount_z(cFiles) LPCWSTR* /*rgwzFiles*/,
+        __in int /*nRecommendation*/,
+        __inout int* pResult
+        )
+    {
+        if (CheckCanceled())
+        {
+            *pResult = IDCANCEL;
+        }
+
+        return S_OK;
+    }
+
+    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;
+        BOOL fRetry = FALSE;
+
+        if (CheckCanceled())
+        {
+            ExitFunction1(hr = HRESULT_FROM_WIN32(ERROR_INSTALL_USEREXIT));
+        }
+
+        hr = BalRetryEndPackage(BALRETRY_TYPE_EXECUTE, wzPackageId, NULL, hrStatus, &fRetry);
+        ExitOnFailure(hr, "BalRetryEndPackage for execute failed");
+
+        if (fRetry)
+        {
+            *pAction = BOOTSTRAPPER_EXECUTEPACKAGECOMPLETE_ACTION_RETRY;
+        }
+
+    LExit:
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnExecuteComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnUnregisterBegin(
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnUnregisterComplete(
+        __in HRESULT /*hrStatus*/
+        )
+    {
+        return S_OK;
+    }
+
+    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;
+        BOOL fRestartRequired = BOOTSTRAPPER_APPLY_RESTART_REQUIRED == restart;
+        BOOL fShouldBlockRestart = BOOTSTRAPPER_DISPLAY_FULL <= m_display && BOOTSTRAPPER_RESTART_PROMPT >= m_restart;
+
+        if (fRestartRequired && !fShouldBlockRestart)
+        {
+            *pAction = BOOTSTRAPPER_APPLYCOMPLETE_ACTION_RESTART;
+        }
+
+        m_fApplying = FALSE;
+
+        return hr;
+    }
+
+    virtual STDMETHODIMP OnLaunchApprovedExeBegin(
+        __inout BOOL* pfCancel
+        )
+    {
+        *pfCancel |= CheckCanceled();
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP OnLaunchApprovedExeComplete(
+        __in HRESULT /*hrStatus*/,
+        __in DWORD /*dwProcessId*/
+        )
+    {
+        return S_OK;
+    }
+
+    virtual STDMETHODIMP_(HRESULT) BAProc(
+        __in BOOTSTRAPPER_APPLICATION_MESSAGE /*message*/,
+        __in const LPVOID /*pvArgs*/,
+        __inout LPVOID /*pvResults*/,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+        return E_NOTIMPL;
+    }
+
+    virtual STDMETHODIMP_(void) BAProcFallback(
+        __in BOOTSTRAPPER_APPLICATION_MESSAGE /*message*/,
+        __in const LPVOID /*pvArgs*/,
+        __inout LPVOID /*pvResults*/,
+        __inout HRESULT* /*phr*/,
+        __in_opt LPVOID /*pvContext*/
+        )
+    {
+    }
+
+protected:
+    //
+    // PromptCancel - prompts the user to close (if not forced).
+    //
+    virtual BOOL PromptCancel(
+        __in HWND hWnd,
+        __in BOOL fForceCancel,
+        __in_z_opt LPCWSTR wzMessage,
+        __in_z_opt LPCWSTR wzCaption
+        )
+    {
+        ::EnterCriticalSection(&m_csCanceled);
+
+        // Only prompt the user to close if we have not canceled already.
+        if (!m_fCanceled)
+        {
+            if (fForceCancel)
+            {
+                m_fCanceled = TRUE;
+            }
+            else
+            {
+                m_fCanceled = (IDYES == ::MessageBoxW(hWnd, wzMessage, wzCaption, MB_YESNO | MB_ICONEXCLAMATION));
+            }
+        }
+
+        ::LeaveCriticalSection(&m_csCanceled);
+
+        return m_fCanceled;
+    }
+
+    //
+    // CheckCanceled - waits if the cancel dialog is up and checks to see if the user canceled the operation.
+    //
+    BOOL CheckCanceled()
+    {
+        ::EnterCriticalSection(&m_csCanceled);
+        ::LeaveCriticalSection(&m_csCanceled);
+        return m_fRollingBack ? FALSE : m_fCanceled;
+    }
+
+    BOOL IsRollingBack()
+    {
+        return m_fRollingBack;
+    }
+
+    BOOL IsCanceled()
+    {
+        return m_fCanceled;
+    }
+
+    CBalBaseBootstrapperApplication(
+        __in IBootstrapperEngine* pEngine,
+        __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+        __in DWORD dwRetryCount = 0,
+        __in DWORD dwRetryTimeout = 1000
+        )
+    {
+        m_cReferences = 1;
+        m_display = pArgs->pCommand->display;
+        m_restart = pArgs->pCommand->restart;
+
+        pEngine->AddRef();
+        m_pEngine = pEngine;
+
+        ::InitializeCriticalSection(&m_csCanceled);
+        m_fCanceled = FALSE;
+        m_fApplying = FALSE;
+        m_fRollingBack = FALSE;
+
+        BalRetryInitialize(dwRetryCount, dwRetryTimeout);
+    }
+
+    virtual ~CBalBaseBootstrapperApplication()
+    {
+        BalRetryUninitialize();
+        ::DeleteCriticalSection(&m_csCanceled);
+
+        ReleaseNullObject(m_pEngine);
+    }
+
+protected:
+    CRITICAL_SECTION m_csCanceled;
+    BOOL m_fCanceled;
+
+private:
+    long m_cReferences;
+    BOOTSTRAPPER_DISPLAY m_display;
+    BOOTSTRAPPER_RESTART m_restart;
+    IBootstrapperEngine* m_pEngine;
+
+    BOOL m_fApplying;
+    BOOL m_fRollingBack;
+
+    DWORD m_dwProgressPercentage;
+    DWORD m_dwOverallProgressPercentage;
+};
diff --git a/src/balutil/inc/BalBaseBootstrapperApplicationProc.h b/src/balutil/inc/BalBaseBootstrapperApplicationProc.h
new file mode 100644
index 00000000..4b8f4ca7
--- /dev/null
+++ b/src/balutil/inc/BalBaseBootstrapperApplicationProc.h
@@ -0,0 +1,698 @@
+#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 "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+
+static HRESULT BalBaseBAProcOnDetectBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTBEGIN_ARGS* pArgs,
+    __inout BA_ONDETECTBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectBegin(pArgs->fInstalled, pArgs->cPackages, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTCOMPLETE_ARGS* pArgs,
+    __inout BA_ONDETECTCOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnDetectComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnPlanBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANBEGIN_ARGS* pArgs,
+    __inout BA_ONPLANBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanBegin(pArgs->cPackages, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANCOMPLETE_ARGS* pArgs,
+    __inout BA_ONPLANCOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnPlanComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnStartup(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONSTARTUP_ARGS* /*pArgs*/,
+    __inout BA_ONSTARTUP_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnStartup();
+}
+
+static HRESULT BalBaseBAProcOnShutdown(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONSHUTDOWN_ARGS* /*pArgs*/,
+    __inout BA_ONSHUTDOWN_RESULTS* pResults
+    )
+{
+    return pBA->OnShutdown(&pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnSystemShutdown(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONSYSTEMSHUTDOWN_ARGS* pArgs,
+    __inout BA_ONSYSTEMSHUTDOWN_RESULTS* pResults
+    )
+{
+    return pBA->OnSystemShutdown(pArgs->dwEndSession, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectForwardCompatibleBundle(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_ARGS* pArgs,
+    __inout BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectForwardCompatibleBundle(pArgs->wzBundleId, pArgs->relationType, pArgs->wzBundleTag, pArgs->fPerMachine, pArgs->dw64Version, &pResults->fCancel, &pResults->fIgnoreBundle);
+}
+
+static HRESULT BalBaseBAProcOnDetectUpdateBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTUPDATEBEGIN_ARGS* pArgs,
+    __inout BA_ONDETECTUPDATEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectUpdateBegin(pArgs->wzUpdateLocation, &pResults->fCancel, &pResults->fSkip);
+}
+
+static HRESULT BalBaseBAProcOnDetectUpdate(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTUPDATE_ARGS* pArgs,
+    __inout BA_ONDETECTUPDATE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectUpdate(pArgs->wzUpdateLocation, pArgs->dw64Size, pArgs->dw64Version, pArgs->wzTitle, pArgs->wzSummary, pArgs->wzContentType, pArgs->wzContent, &pResults->fCancel, &pResults->fStopProcessingUpdates);
+}
+
+static HRESULT BalBaseBAProcOnDetectUpdateComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTUPDATECOMPLETE_ARGS* pArgs,
+    __inout BA_ONDETECTUPDATECOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectUpdateComplete(pArgs->hrStatus, &pResults->fIgnoreError);
+}
+
+static HRESULT BalBaseBAProcOnDetectRelatedBundle(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTRELATEDBUNDLE_ARGS* pArgs,
+    __inout BA_ONDETECTRELATEDBUNDLE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectRelatedBundle(pArgs->wzBundleId, pArgs->relationType, pArgs->wzBundleTag, pArgs->fPerMachine, pArgs->dw64Version, pArgs->operation, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectPackageBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTPACKAGEBEGIN_ARGS* pArgs,
+    __inout BA_ONDETECTPACKAGEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectPackageBegin(pArgs->wzPackageId, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectCompatiblePackage(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTCOMPATIBLEMSIPACKAGE_ARGS* pArgs,
+    __inout BA_ONDETECTCOMPATIBLEMSIPACKAGE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectCompatibleMsiPackage(pArgs->wzPackageId, pArgs->wzCompatiblePackageId, pArgs->dw64CompatiblePackageVersion, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectRelatedMsiPackage(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTRELATEDMSIPACKAGE_ARGS* pArgs,
+    __inout BA_ONDETECTRELATEDMSIPACKAGE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectRelatedMsiPackage(pArgs->wzPackageId, pArgs->wzUpgradeCode, pArgs->wzProductCode, pArgs->fPerMachine, pArgs->dw64Version, pArgs->operation, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectTargetMsiPackage(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTTARGETMSIPACKAGE_ARGS* pArgs,
+    __inout BA_ONDETECTTARGETMSIPACKAGE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectTargetMsiPackage(pArgs->wzPackageId, pArgs->wzProductCode, pArgs->patchState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectMsiFeature(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTMSIFEATURE_ARGS* pArgs,
+    __inout BA_ONDETECTMSIFEATURE_RESULTS* pResults
+    )
+{
+    return pBA->OnDetectMsiFeature(pArgs->wzPackageId, pArgs->wzFeatureId, pArgs->state, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnDetectPackageComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONDETECTPACKAGECOMPLETE_ARGS* pArgs,
+    __inout BA_ONDETECTPACKAGECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnDetectPackageComplete(pArgs->wzPackageId, pArgs->hrStatus, pArgs->state);
+}
+
+static HRESULT BalBaseBAProcOnPlanRelatedBundle(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANRELATEDBUNDLE_ARGS* pArgs,
+    __inout BA_ONPLANRELATEDBUNDLE_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanRelatedBundle(pArgs->wzBundleId, pArgs->recommendedState, &pResults->requestedState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanPackageBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANPACKAGEBEGIN_ARGS* pArgs,
+    __inout BA_ONPLANPACKAGEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanPackageBegin(pArgs->wzPackageId, pArgs->recommendedState, &pResults->requestedState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanCompatibleMsiPackageBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANCOMPATIBLEMSIPACKAGEBEGIN_ARGS* pArgs,
+    __inout BA_ONPLANCOMPATIBLEMSIPACKAGEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanCompatibleMsiPackageBegin(pArgs->wzPackageId, pArgs->wzCompatiblePackageId, pArgs->dw64CompatiblePackageVersion, pArgs->recommendedState, &pResults->requestedState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanCompatibleMsiPackageComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE_ARGS* pArgs,
+    __inout BA_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnPlanCompatibleMsiPackageComplete(pArgs->wzPackageId, pArgs->wzCompatiblePackageId, pArgs->hrStatus, pArgs->state, pArgs->requested, pArgs->execute, pArgs->rollback);
+}
+
+static HRESULT BalBaseBAProcOnPlanTargetMsiPackage(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANTARGETMSIPACKAGE_ARGS* pArgs,
+    __inout BA_ONPLANTARGETMSIPACKAGE_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanTargetMsiPackage(pArgs->wzPackageId, pArgs->wzProductCode, pArgs->recommendedState, &pResults->requestedState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanMsiFeature(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANMSIFEATURE_ARGS* pArgs,
+    __inout BA_ONPLANMSIFEATURE_RESULTS* pResults
+    )
+{
+    return pBA->OnPlanMsiFeature(pArgs->wzPackageId, pArgs->wzFeatureId, pArgs->recommendedState, &pResults->requestedState, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnPlanPackageComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPLANPACKAGECOMPLETE_ARGS* pArgs,
+    __inout BA_ONPLANPACKAGECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnPlanPackageComplete(pArgs->wzPackageId, pArgs->hrStatus, pArgs->state, pArgs->requested, pArgs->execute, pArgs->rollback);
+}
+
+static HRESULT BalBaseBAProcOnApplyBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONAPPLYBEGIN_ARGS* pArgs,
+    __inout BA_ONAPPLYBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnApplyBegin(pArgs->dwPhaseCount, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnElevateBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONELEVATEBEGIN_ARGS* /*pArgs*/,
+    __inout BA_ONELEVATEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnElevateBegin(&pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnElevateComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONELEVATECOMPLETE_ARGS* pArgs,
+    __inout BA_ONELEVATECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnElevateComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnProgress(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONPROGRESS_ARGS* pArgs,
+    __inout BA_ONPROGRESS_RESULTS* pResults
+    )
+{
+    return pBA->OnProgress(pArgs->dwProgressPercentage, pArgs->dwOverallPercentage, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnError(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONERROR_ARGS* pArgs,
+    __inout BA_ONERROR_RESULTS* pResults
+    )
+{
+    return pBA->OnError(pArgs->errorType, pArgs->wzPackageId, pArgs->dwCode, pArgs->wzError, pArgs->dwUIHint, pArgs->cData, pArgs->rgwzData, pArgs->nRecommendation, &pResults->nResult);
+}
+
+static HRESULT BalBaseBAProcOnRegisterBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONREGISTERBEGIN_ARGS* /*pArgs*/,
+    __inout BA_ONREGISTERBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnRegisterBegin(&pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnRegisterComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONREGISTERCOMPLETE_ARGS* pArgs,
+    __inout BA_ONREGISTERCOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnRegisterComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnCacheBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEBEGIN_ARGS* /*pArgs*/,
+    __inout BA_ONCACHEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheBegin(&pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnCachePackageBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEPACKAGEBEGIN_ARGS* pArgs,
+    __inout BA_ONCACHEPACKAGEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnCachePackageBegin(pArgs->wzPackageId, pArgs->cCachePayloads, pArgs->dw64PackageCacheSize, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnCacheAcquireBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEACQUIREBEGIN_ARGS* pArgs,
+    __inout BA_ONCACHEACQUIREBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheAcquireBegin(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, pArgs->operation, pArgs->wzSource, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnCacheAcquireProgress(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEACQUIREPROGRESS_ARGS* pArgs,
+    __inout BA_ONCACHEACQUIREPROGRESS_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheAcquireProgress(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, pArgs->dw64Progress, pArgs->dw64Total, pArgs->dwOverallPercentage, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnResolveSource(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONRESOLVESOURCE_ARGS* pArgs,
+    __inout BA_ONRESOLVESOURCE_RESULTS* pResults
+    )
+{
+    return pBA->OnResolveSource(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, pArgs->wzLocalSource, pArgs->wzDownloadSource, pArgs->recommendation, &pResults->action, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnCacheAcquireComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEACQUIRECOMPLETE_ARGS* pArgs,
+    __inout BA_ONCACHEACQUIRECOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheAcquireComplete(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, pArgs->hrStatus, pArgs->recommendation, &pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnCacheVerifyBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEVERIFYBEGIN_ARGS* pArgs,
+    __inout BA_ONCACHEVERIFYBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheVerifyBegin(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnCacheVerifyComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEVERIFYCOMPLETE_ARGS* pArgs,
+    __inout BA_ONCACHEVERIFYCOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnCacheVerifyComplete(pArgs->wzPackageOrContainerId, pArgs->wzPayloadId, pArgs->hrStatus, pArgs->recommendation, &pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnCachePackageComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHEPACKAGECOMPLETE_ARGS* pArgs,
+    __inout BA_ONCACHEPACKAGECOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnCachePackageComplete(pArgs->wzPackageId, pArgs->hrStatus, pArgs->recommendation, &pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnCacheComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONCACHECOMPLETE_ARGS* pArgs,
+    __inout BA_ONCACHECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnCacheComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnExecuteBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEBEGIN_ARGS* pArgs,
+    __inout BA_ONEXECUTEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnExecuteBegin(pArgs->cExecutingPackages, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnExecutePackageBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEPACKAGEBEGIN_ARGS* pArgs,
+    __inout BA_ONEXECUTEPACKAGEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnExecutePackageBegin(pArgs->wzPackageId, pArgs->fExecute, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnExecutePatchTarget(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEPATCHTARGET_ARGS* pArgs,
+    __inout BA_ONEXECUTEPATCHTARGET_RESULTS* pResults
+    )
+{
+    return pBA->OnExecutePatchTarget(pArgs->wzPackageId, pArgs->wzTargetProductCode, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnExecuteProgress(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEPROGRESS_ARGS* pArgs,
+    __inout BA_ONEXECUTEPROGRESS_RESULTS* pResults
+    )
+{
+    return pBA->OnExecuteProgress(pArgs->wzPackageId, pArgs->dwProgressPercentage, pArgs->dwOverallPercentage, &pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnExecuteMsiMessage(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEMSIMESSAGE_ARGS* pArgs,
+    __inout BA_ONEXECUTEMSIMESSAGE_RESULTS* pResults
+    )
+{
+    return pBA->OnExecuteMsiMessage(pArgs->wzPackageId, pArgs->messageType, pArgs->dwUIHint, pArgs->wzMessage, pArgs->cData, pArgs->rgwzData, pArgs->nRecommendation, &pResults->nResult);
+}
+
+static HRESULT BalBaseBAProcOnExecuteFilesInUse(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEFILESINUSE_ARGS* pArgs,
+    __inout BA_ONEXECUTEFILESINUSE_RESULTS* pResults
+    )
+{
+    return pBA->OnExecuteFilesInUse(pArgs->wzPackageId, pArgs->cFiles, pArgs->rgwzFiles, pArgs->nRecommendation, &pResults->nResult);
+}
+
+static HRESULT BalBaseBAProcOnExecutePackageComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTEPACKAGECOMPLETE_ARGS* pArgs,
+    __inout BA_ONEXECUTEPACKAGECOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnExecutePackageComplete(pArgs->wzPackageId, pArgs->hrStatus, pArgs->restart, pArgs->recommendation, &pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnExecuteComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONEXECUTECOMPLETE_ARGS* pArgs,
+    __inout BA_ONEXECUTECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnExecuteComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnUnregisterBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONUNREGISTERBEGIN_ARGS* /*pArgs*/,
+    __inout BA_ONUNREGISTERBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnUnregisterBegin(&pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnUnregisterComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONUNREGISTERCOMPLETE_ARGS* pArgs,
+    __inout BA_ONUNREGISTERCOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnUnregisterComplete(pArgs->hrStatus);
+}
+
+static HRESULT BalBaseBAProcOnApplyComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONAPPLYCOMPLETE_ARGS* pArgs,
+    __inout BA_ONAPPLYCOMPLETE_RESULTS* pResults
+    )
+{
+    return pBA->OnApplyComplete(pArgs->hrStatus, pArgs->restart, pArgs->recommendation, &pResults->action);
+}
+
+static HRESULT BalBaseBAProcOnLaunchApprovedExeBegin(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONLAUNCHAPPROVEDEXEBEGIN_ARGS* /*pArgs*/,
+    __inout BA_ONLAUNCHAPPROVEDEXEBEGIN_RESULTS* pResults
+    )
+{
+    return pBA->OnLaunchApprovedExeBegin(&pResults->fCancel);
+}
+
+static HRESULT BalBaseBAProcOnLaunchApprovedExeComplete(
+    __in IBootstrapperApplication* pBA,
+    __in BA_ONLAUNCHAPPROVEDEXECOMPLETE_ARGS* pArgs,
+    __inout BA_ONLAUNCHAPPROVEDEXECOMPLETE_RESULTS* /*pResults*/
+    )
+{
+    return pBA->OnLaunchApprovedExeComplete(pArgs->hrStatus, pArgs->dwProcessId);
+}
+
+/*******************************************************************
+BalBaseBootstrapperApplicationProc - requires pvContext to be of type IBootstrapperApplication.
+                                     Provides a default mapping between the new message based BA interface and
+                                     the old COM-based BA interface.
+
+*******************************************************************/
+static HRESULT WINAPI BalBaseBootstrapperApplicationProc(
+    __in BOOTSTRAPPER_APPLICATION_MESSAGE message,
+    __in const LPVOID pvArgs,
+    __inout LPVOID pvResults,
+    __in_opt LPVOID pvContext
+    )
+{
+    IBootstrapperApplication* pBA = reinterpret_cast<IBootstrapperApplication*>(pvContext);
+    HRESULT hr = pBA->BAProc(message, pvArgs, pvResults, pvContext);
+    
+    if (E_NOTIMPL == hr)
+    {
+        switch (message)
+        {
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTBEGIN:
+            hr = BalBaseBAProcOnDetectBegin(pBA, reinterpret_cast<BA_ONDETECTBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTCOMPLETE:
+            hr = BalBaseBAProcOnDetectComplete(pBA, reinterpret_cast<BA_ONDETECTCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANBEGIN:
+            hr = BalBaseBAProcOnPlanBegin(pBA, reinterpret_cast<BA_ONPLANBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPLETE:
+            hr = BalBaseBAProcOnPlanComplete(pBA, reinterpret_cast<BA_ONPLANCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSTARTUP:
+            hr = BalBaseBAProcOnStartup(pBA, reinterpret_cast<BA_ONSTARTUP_ARGS*>(pvArgs), reinterpret_cast<BA_ONSTARTUP_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSHUTDOWN:
+            hr = BalBaseBAProcOnShutdown(pBA, reinterpret_cast<BA_ONSHUTDOWN_ARGS*>(pvArgs), reinterpret_cast<BA_ONSHUTDOWN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONSYSTEMSHUTDOWN:
+            hr = BalBaseBAProcOnSystemShutdown(pBA, reinterpret_cast<BA_ONSYSTEMSHUTDOWN_ARGS*>(pvArgs), reinterpret_cast<BA_ONSYSTEMSHUTDOWN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTFORWARDCOMPATIBLEBUNDLE:
+            hr = BalBaseBAProcOnDetectForwardCompatibleBundle(pBA, reinterpret_cast<BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTFORWARDCOMPATIBLEBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATEBEGIN:
+            hr = BalBaseBAProcOnDetectUpdateBegin(pBA, reinterpret_cast<BA_ONDETECTUPDATEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATE:
+            hr = BalBaseBAProcOnDetectUpdate(pBA, reinterpret_cast<BA_ONDETECTUPDATE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTUPDATECOMPLETE:
+            hr = BalBaseBAProcOnDetectUpdateComplete(pBA, reinterpret_cast<BA_ONDETECTUPDATECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTUPDATECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDBUNDLE:
+            hr = BalBaseBAProcOnDetectRelatedBundle(pBA, reinterpret_cast<BA_ONDETECTRELATEDBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTRELATEDBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGEBEGIN:
+            hr = BalBaseBAProcOnDetectPackageBegin(pBA, reinterpret_cast<BA_ONDETECTPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTCOMPATIBLEMSIPACKAGE:
+            hr = BalBaseBAProcOnDetectCompatiblePackage(pBA, reinterpret_cast<BA_ONDETECTCOMPATIBLEMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTCOMPATIBLEMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTRELATEDMSIPACKAGE:
+            hr = BalBaseBAProcOnDetectRelatedMsiPackage(pBA, reinterpret_cast<BA_ONDETECTRELATEDMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTRELATEDMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTTARGETMSIPACKAGE:
+            hr = BalBaseBAProcOnDetectTargetMsiPackage(pBA, reinterpret_cast<BA_ONDETECTTARGETMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTTARGETMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTMSIFEATURE:
+            hr = BalBaseBAProcOnDetectMsiFeature(pBA, reinterpret_cast<BA_ONDETECTMSIFEATURE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTMSIFEATURE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONDETECTPACKAGECOMPLETE:
+            hr = BalBaseBAProcOnDetectPackageComplete(pBA, reinterpret_cast<BA_ONDETECTPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONDETECTPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANRELATEDBUNDLE:
+            hr = BalBaseBAProcOnPlanRelatedBundle(pBA, reinterpret_cast<BA_ONPLANRELATEDBUNDLE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANRELATEDBUNDLE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGEBEGIN:
+            hr = BalBaseBAProcOnPlanPackageBegin(pBA, reinterpret_cast<BA_ONPLANPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGEBEGIN:
+            hr = BalBaseBAProcOnPlanCompatibleMsiPackageBegin(pBA, reinterpret_cast<BA_ONPLANCOMPATIBLEMSIPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANCOMPATIBLEMSIPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE:
+            hr = BalBaseBAProcOnPlanCompatibleMsiPackageComplete(pBA, reinterpret_cast<BA_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANCOMPATIBLEMSIPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANTARGETMSIPACKAGE:
+            hr = BalBaseBAProcOnPlanTargetMsiPackage(pBA, reinterpret_cast<BA_ONPLANTARGETMSIPACKAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANTARGETMSIPACKAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANMSIFEATURE:
+            hr = BalBaseBAProcOnPlanMsiFeature(pBA, reinterpret_cast<BA_ONPLANMSIFEATURE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANMSIFEATURE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPLANPACKAGECOMPLETE:
+            hr = BalBaseBAProcOnPlanPackageComplete(pBA, reinterpret_cast<BA_ONPLANPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONPLANPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYBEGIN:
+            hr = BalBaseBAProcOnApplyBegin(pBA, reinterpret_cast<BA_ONAPPLYBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONAPPLYBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATEBEGIN:
+            hr = BalBaseBAProcOnElevateBegin(pBA, reinterpret_cast<BA_ONELEVATEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONELEVATEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONELEVATECOMPLETE:
+            hr = BalBaseBAProcOnElevateComplete(pBA, reinterpret_cast<BA_ONELEVATECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONELEVATECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONPROGRESS:
+            hr = BalBaseBAProcOnProgress(pBA, reinterpret_cast<BA_ONPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONERROR:
+            hr = BalBaseBAProcOnError(pBA, reinterpret_cast<BA_ONERROR_ARGS*>(pvArgs), reinterpret_cast<BA_ONERROR_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERBEGIN:
+            hr = BalBaseBAProcOnRegisterBegin(pBA, reinterpret_cast<BA_ONREGISTERBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONREGISTERBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONREGISTERCOMPLETE:
+            hr = BalBaseBAProcOnRegisterComplete(pBA, reinterpret_cast<BA_ONREGISTERCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONREGISTERCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEBEGIN:
+            hr = BalBaseBAProcOnCacheBegin(pBA, reinterpret_cast<BA_ONCACHEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGEBEGIN:
+            hr = BalBaseBAProcOnCachePackageBegin(pBA, reinterpret_cast<BA_ONCACHEPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREBEGIN:
+            hr = BalBaseBAProcOnCacheAcquireBegin(pBA, reinterpret_cast<BA_ONCACHEACQUIREBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIREBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIREPROGRESS:
+            hr = BalBaseBAProcOnCacheAcquireProgress(pBA, reinterpret_cast<BA_ONCACHEACQUIREPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIREPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONRESOLVESOURCE:
+            hr = BalBaseBAProcOnResolveSource(pBA, reinterpret_cast<BA_ONRESOLVESOURCE_ARGS*>(pvArgs), reinterpret_cast<BA_ONRESOLVESOURCE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEACQUIRECOMPLETE:
+            hr = BalBaseBAProcOnCacheAcquireComplete(pBA, reinterpret_cast<BA_ONCACHEACQUIRECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEACQUIRECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYBEGIN:
+            hr = BalBaseBAProcOnCacheVerifyBegin(pBA, reinterpret_cast<BA_ONCACHEVERIFYBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEVERIFYBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEVERIFYCOMPLETE:
+            hr = BalBaseBAProcOnCacheVerifyComplete(pBA, reinterpret_cast<BA_ONCACHEVERIFYCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEVERIFYCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHEPACKAGECOMPLETE:
+            hr = BalBaseBAProcOnCachePackageComplete(pBA, reinterpret_cast<BA_ONCACHEPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHEPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONCACHECOMPLETE:
+            hr = BalBaseBAProcOnCacheComplete(pBA, reinterpret_cast<BA_ONCACHECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONCACHECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEBEGIN:
+            hr = BalBaseBAProcOnExecuteBegin(pBA, reinterpret_cast<BA_ONEXECUTEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGEBEGIN:
+            hr = BalBaseBAProcOnExecutePackageBegin(pBA, reinterpret_cast<BA_ONEXECUTEPACKAGEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPACKAGEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPATCHTARGET:
+            hr = BalBaseBAProcOnExecutePatchTarget(pBA, reinterpret_cast<BA_ONEXECUTEPATCHTARGET_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPATCHTARGET_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPROGRESS:
+            hr = BalBaseBAProcOnExecuteProgress(pBA, reinterpret_cast<BA_ONEXECUTEPROGRESS_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPROGRESS_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEMSIMESSAGE:
+            hr = BalBaseBAProcOnExecuteMsiMessage(pBA, reinterpret_cast<BA_ONEXECUTEMSIMESSAGE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEMSIMESSAGE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEFILESINUSE:
+            hr = BalBaseBAProcOnExecuteFilesInUse(pBA, reinterpret_cast<BA_ONEXECUTEFILESINUSE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEFILESINUSE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTEPACKAGECOMPLETE:
+            hr = BalBaseBAProcOnExecutePackageComplete(pBA, reinterpret_cast<BA_ONEXECUTEPACKAGECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTEPACKAGECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONEXECUTECOMPLETE:
+            hr = BalBaseBAProcOnExecuteComplete(pBA, reinterpret_cast<BA_ONEXECUTECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONEXECUTECOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERBEGIN:
+            hr = BalBaseBAProcOnUnregisterBegin(pBA, reinterpret_cast<BA_ONUNREGISTERBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONUNREGISTERBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONUNREGISTERCOMPLETE:
+            hr = BalBaseBAProcOnUnregisterComplete(pBA, reinterpret_cast<BA_ONUNREGISTERCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONUNREGISTERCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONAPPLYCOMPLETE:
+            hr = BalBaseBAProcOnApplyComplete(pBA, reinterpret_cast<BA_ONAPPLYCOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONAPPLYCOMPLETE_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXEBEGIN:
+            hr = BalBaseBAProcOnLaunchApprovedExeBegin(pBA, reinterpret_cast<BA_ONLAUNCHAPPROVEDEXEBEGIN_ARGS*>(pvArgs), reinterpret_cast<BA_ONLAUNCHAPPROVEDEXEBEGIN_RESULTS*>(pvResults));
+            break;
+        case BOOTSTRAPPER_APPLICATION_MESSAGE_ONLAUNCHAPPROVEDEXECOMPLETE:
+            hr = BalBaseBAProcOnLaunchApprovedExeComplete(pBA, reinterpret_cast<BA_ONLAUNCHAPPROVEDEXECOMPLETE_ARGS*>(pvArgs), reinterpret_cast<BA_ONLAUNCHAPPROVEDEXECOMPLETE_RESULTS*>(pvResults));
+            break;
+        }
+    }
+
+    pBA->BAProcFallback(message, pvArgs, pvResults, &hr, pvContext);
+
+    return hr;
+}
diff --git a/src/balutil/inc/BalBootstrapperEngine.h b/src/balutil/inc/BalBootstrapperEngine.h
new file mode 100644
index 00000000..45131d98
--- /dev/null
+++ b/src/balutil/inc/BalBootstrapperEngine.h
@@ -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.
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// function declarations
+
+HRESULT BalBootstrapperEngineCreate(
+    __in PFN_BOOTSTRAPPER_ENGINE_PROC pfnBAEngineProc,
+    __in_opt LPVOID pvBAEngineProcContext,
+    __out IBootstrapperEngine** ppEngineForApplication
+    );
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/inc/IBAFunctions.h b/src/balutil/inc/IBAFunctions.h
new file mode 100644
index 00000000..7d8a07fa
--- /dev/null
+++ b/src/balutil/inc/IBAFunctions.h
@@ -0,0 +1,34 @@
+#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.
+
+
+DECLARE_INTERFACE_IID_(IBAFunctions, IBootstrapperApplication, "0FB445ED-17BD-49C7-BE19-479776F8AE96")
+{
+    // OnThemeLoaded - Called after the BA finished loading all the controls for the theme.
+    //
+    STDMETHOD(OnThemeLoaded)(
+        THEME* pTheme,
+        WIX_LOCALIZATION* pWixLoc
+        ) = 0;
+
+    // WndProc - Called if the BA hasn't handled the message.
+    //           The implementation must either return E_NOTIMPL or call ThemeDefWindowProc for unhandled messages.
+    //
+    STDMETHOD(WndProc)(
+        __in THEME* pTheme,
+        __in HWND hWnd,
+        __in UINT uMsg,
+        __in WPARAM wParam,
+        __in LPARAM lParam,
+        __inout LRESULT* plRes
+        ) = 0;
+
+    // BAFunctionsProc - The PFN_BA_FUNCTIONS_PROC can call this method to give the BAFunctions raw access to the callback from WixStdBA.
+    //                   This might be used to help the BAFunctions support more than one version of the engine/WixStdBA.
+    STDMETHOD(BAFunctionsProc)(
+        __in BA_FUNCTIONS_MESSAGE message,
+        __in const LPVOID pvArgs,
+        __inout LPVOID pvResults,
+        __in_opt LPVOID pvContext
+        ) = 0;
+};
diff --git a/src/balutil/inc/balcondition.h b/src/balutil/inc/balcondition.h
new file mode 100644
index 00000000..677c593f
--- /dev/null
+++ b/src/balutil/inc/balcondition.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.
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _BAL_CONDITION
+{
+    LPWSTR sczCondition;
+    LPWSTR sczMessage;
+} BAL_CONDITION;
+
+
+typedef struct _BAL_CONDITIONS
+{
+    BAL_CONDITION* rgConditions;
+    DWORD cConditions;
+} BAL_CONDITIONS;
+
+
+/*******************************************************************
+ BalConditionsParseFromXml - loads the conditions from the UX manifest.
+
+********************************************************************/
+DAPI_(HRESULT) BalConditionsParseFromXml(
+    __in BAL_CONDITIONS* pConditions,
+    __in IXMLDOMDocument* pixdManifest,
+    __in_opt WIX_LOCALIZATION* pWixLoc
+    );
+
+
+/*******************************************************************
+ BalConditionEvaluate - evaluates condition against the provided IBurnCore.
+
+ NOTE: psczMessage is optional.
+********************************************************************/
+DAPI_(HRESULT) BalConditionEvaluate(
+    __in BAL_CONDITION* pCondition,
+    __in IBootstrapperEngine* pEngine,
+    __out BOOL* pfResult,
+    __out_z_opt LPWSTR* psczMessage
+    );
+
+
+/*******************************************************************
+ BalConditionsUninitialize - uninitializes any conditions previously loaded.
+
+********************************************************************/
+DAPI_(void) BalConditionsUninitialize(
+    __in BAL_CONDITIONS* pConditions
+    );
+
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/inc/balinfo.h b/src/balutil/inc/balinfo.h
new file mode 100644
index 00000000..be4b75d0
--- /dev/null
+++ b/src/balutil/inc/balinfo.h
@@ -0,0 +1,107 @@
+#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.
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum BAL_INFO_PACKAGE_TYPE
+{
+    BAL_INFO_PACKAGE_TYPE_UNKNOWN,
+    BAL_INFO_PACKAGE_TYPE_EXE,
+    BAL_INFO_PACKAGE_TYPE_MSI,
+    BAL_INFO_PACKAGE_TYPE_MSP,
+    BAL_INFO_PACKAGE_TYPE_MSU,
+    BAL_INFO_PACKAGE_TYPE_BUNDLE_UPGRADE,
+    BAL_INFO_PACKAGE_TYPE_BUNDLE_ADDON,
+    BAL_INFO_PACKAGE_TYPE_BUNDLE_PATCH,
+} BAL_INFO_PACKAGE_TYPE;
+
+typedef enum BAL_INFO_CACHE_TYPE
+{
+    BAL_INFO_CACHE_TYPE_NO,
+    BAL_INFO_CACHE_TYPE_YES,
+    BAL_INFO_CACHE_TYPE_ALWAYS,
+} BAL_INFO_CACHE_TYPE;
+
+
+typedef struct _BAL_INFO_PACKAGE
+{
+    LPWSTR sczId;
+    LPWSTR sczDisplayName;
+    LPWSTR sczDescription;
+    BAL_INFO_PACKAGE_TYPE type;
+    BOOL fPermanent;
+    BOOL fVital;
+    BOOL fDisplayInternalUI;
+    LPWSTR sczProductCode;
+    LPWSTR sczUpgradeCode;
+    LPWSTR sczVersion;
+    LPWSTR sczInstallCondition;
+    BAL_INFO_CACHE_TYPE cacheType;
+} BAL_INFO_PACKAGE;
+
+
+typedef struct _BAL_INFO_PACKAGES
+{
+    BAL_INFO_PACKAGE* rgPackages;
+    DWORD cPackages;
+} BAL_INFO_PACKAGES;
+
+
+typedef struct _BAL_INFO_BUNDLE
+{
+    BOOL fPerMachine;
+    LPWSTR sczName;
+    LPWSTR sczLogVariable;
+    BAL_INFO_PACKAGES packages;
+} BAL_INFO_BUNDLE;
+
+
+/*******************************************************************
+ BalInfoParseFromXml - loads the bundle and package info from the UX
+                       manifest.
+
+********************************************************************/
+DAPI_(HRESULT) BalInfoParseFromXml(
+    __in BAL_INFO_BUNDLE* pBundle,
+    __in IXMLDOMDocument* pixdManifest
+    );
+
+
+/*******************************************************************
+ BalInfoAddRelatedBundleAsPackage - adds a related bundle as a package.
+
+ ********************************************************************/
+DAPI_(HRESULT) BalInfoAddRelatedBundleAsPackage(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in LPCWSTR wzId,
+    __in BOOTSTRAPPER_RELATION_TYPE relationType,
+    __in BOOL fPerMachine
+    );
+
+
+/*******************************************************************
+ BalInfoFindPackageById - finds a package by its id.
+
+ ********************************************************************/
+DAPI_(HRESULT) BalInfoFindPackageById(
+    __in BAL_INFO_PACKAGES* pPackages,
+    __in LPCWSTR wzId,
+    __out BAL_INFO_PACKAGE** ppPackage
+    );
+
+
+/*******************************************************************
+ BalInfoUninitialize - uninitializes any info previously loaded.
+
+********************************************************************/
+DAPI_(void) BalInfoUninitialize(
+    __in BAL_INFO_BUNDLE* pBundle
+    );
+
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/inc/balretry.h b/src/balutil/inc/balretry.h
new file mode 100644
index 00000000..040ab4ae
--- /dev/null
+++ b/src/balutil/inc/balretry.h
@@ -0,0 +1,65 @@
+#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.
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum BALRETRY_TYPE
+{
+    BALRETRY_TYPE_CACHE,
+    BALRETRY_TYPE_EXECUTE,
+} BALRETRY_TYPE;
+
+/*******************************************************************
+ BalRetryInitialize - initialize the retry count and timeout between
+                      retries (in milliseconds).
+********************************************************************/
+DAPI_(void) BalRetryInitialize(
+    __in DWORD dwMaxRetries,
+    __in DWORD dwTimeout
+    );
+
+/*******************************************************************
+ BalRetryUninitialize - call to cleanup any memory allocated during
+                        use of the retry utility.
+********************************************************************/
+DAPI_(void) BalRetryUninitialize();
+
+/*******************************************************************
+ BalRetryStartPackage - call when a package begins to be modified. If
+                        the package is being retried, the function will
+                        wait the specified timeout.
+********************************************************************/
+DAPI_(void) BalRetryStartPackage(
+    __in BALRETRY_TYPE type,
+    __in_z_opt LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId
+    );
+
+/*******************************************************************
+ BalRetryErrorOccured - call when an error occurs for the retry utility
+                        to consider.
+********************************************************************/
+DAPI_(void) BalRetryErrorOccurred(
+    __in_z_opt LPCWSTR wzPackageId,
+    __in DWORD dwError
+    );
+
+/*******************************************************************
+ BalRetryEndPackage - returns IDRETRY is a retry is recommended or 
+                      IDNOACTION if a retry is not recommended.
+********************************************************************/
+DAPI_(HRESULT) BalRetryEndPackage(
+    __in BALRETRY_TYPE type,
+    __in_z_opt LPCWSTR wzPackageId,
+    __in_z_opt LPCWSTR wzPayloadId,
+    __in HRESULT hrError,
+    __inout BOOL* pfRetry
+    );
+
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/inc/balutil.h b/src/balutil/inc/balutil.h
new file mode 100644
index 00000000..0fbaab97
--- /dev/null
+++ b/src/balutil/inc/balutil.h
@@ -0,0 +1,165 @@
+#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 "dutil.h"
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BalExitOnFailure(x, f, ...) if (FAILED(x)) { BalLogError(x, f, __VA_ARGS__); ExitTrace(x, f, __VA_ARGS__); goto LExit; }
+#define BalExitOnRootFailure(x, f, ...) if (FAILED(x)) { BalLogError(x, f, __VA_ARGS__); Dutil_RootFailure(__FILE__, __LINE__, x); ExitTrace(x, f, __VA_ARGS__); goto LExit; }
+#define BalExitOnNullWithLastError(p, x, f, ...) if (NULL == p) { DWORD Dutil_er = ::GetLastError(); x = HRESULT_FROM_WIN32(Dutil_er); if (!FAILED(x)) { x = E_FAIL; } BalLogError(x, f, __VA_ARGS__); ExitTrace(x, f, __VA_ARGS__); goto LExit; }
+
+#define FACILITY_WIX 500
+
+const LPCWSTR BAL_MANIFEST_FILENAME = L"BootstrapperApplicationData.xml";
+
+static const HRESULT E_WIXSTDBA_CONDITION_FAILED = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIX, 1);
+
+static const HRESULT E_MBAHOST_NET452_ON_WIN7RTM = MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIX, 1000);
+
+
+/*******************************************************************
+ BalInitialize - remembers the engine interface to enable logging and
+                 other functions.
+
+********************************************************************/
+DAPI_(void) BalInitialize(
+    __in IBootstrapperEngine* pEngine
+    );
+
+/*******************************************************************
+ BalInitializeFromCreateArgs - convenience function to call BalBootstrapperEngineCreate
+                               then pass it along to BalInitialize.
+
+********************************************************************/
+DAPI_(HRESULT) BalInitializeFromCreateArgs(
+    __in const BOOTSTRAPPER_CREATE_ARGS* pArgs,
+    __out IBootstrapperEngine** ppEngine
+    );
+
+/*******************************************************************
+ BalUninitialize - cleans up utility layer internals.
+
+********************************************************************/
+DAPI_(void) BalUninitialize();
+
+/*******************************************************************
+ BalManifestLoad - loads the Application manifest into an XML document.
+
+********************************************************************/
+DAPI_(HRESULT) BalManifestLoad(
+    __in HMODULE hUXModule,
+    __out IXMLDOMDocument** ppixdManifest
+    );
+
+/*******************************************************************
+BalEvaluateCondition - evaluates a condition using variables in the engine.
+
+********************************************************************/
+DAPI_(HRESULT) BalEvaluateCondition(
+    __in_z LPCWSTR wzCondition,
+    __out BOOL* pf
+    );
+
+/*******************************************************************
+BalFormatString - formats a string using variables in the engine.
+
+ Note: Use StrFree() to release psczOut.
+********************************************************************/
+DAPI_(HRESULT) BalFormatString(
+    __in_z LPCWSTR wzFormat,
+    __inout LPWSTR* psczOut
+    );
+
+/*******************************************************************
+BalGetNumericVariable - gets a number from a variable in the engine.
+
+ Note: Returns E_NOTFOUND if variable does not exist.
+********************************************************************/
+DAPI_(HRESULT) BalGetNumericVariable(
+    __in_z LPCWSTR wzVariable,
+    __out LONGLONG* pllValue
+    );
+
+/*******************************************************************
+BalSetNumericVariable - sets a numeric variable in the engine.
+
+********************************************************************/
+DAPI_(HRESULT) BalSetNumericVariable(
+    __in_z LPCWSTR wzVariable,
+    __in LONGLONG llValue
+    );
+
+/*******************************************************************
+BalStringVariableExists - checks if a string variable exists in the engine.
+
+********************************************************************/
+DAPI_(BOOL) BalStringVariableExists(
+    __in_z LPCWSTR wzVariable
+    );
+
+/*******************************************************************
+BalGetStringVariable - gets a string from a variable in the engine.
+
+ Note: Use StrFree() to release psczValue.
+********************************************************************/
+DAPI_(HRESULT) BalGetStringVariable(
+    __in_z LPCWSTR wzVariable,
+    __inout LPWSTR* psczValue
+    );
+
+/*******************************************************************
+BalSetStringVariable - sets a string variable in the engine.
+
+********************************************************************/
+DAPI_(HRESULT) BalSetStringVariable(
+    __in_z LPCWSTR wzVariable,
+    __in_z_opt LPCWSTR wzValue
+    );
+
+/*******************************************************************
+ BalLog - logs a message with the engine.
+
+********************************************************************/
+DAPIV_(HRESULT) BalLog(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    );
+
+/*******************************************************************
+ BalLogError - logs an error message with the engine.
+
+********************************************************************/
+DAPIV_(HRESULT) BalLogError(
+    __in HRESULT hr,
+    __in_z __format_string LPCSTR szFormat,
+    ...
+    );
+
+/*******************************************************************
+BalLogId - logs a message with the engine with a string embedded in a 
+           MESSAGETABLE resource.
+
+********************************************************************/
+DAPIV_(HRESULT) BalLogId(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in DWORD dwLogId,
+    __in HMODULE hModule,
+    ...
+    );
+
+DAPI_(HRESULT) BalLogIdArgs(
+    __in BOOTSTRAPPER_LOG_LEVEL level,
+    __in DWORD dwLogId,
+    __in HMODULE hModule,
+    __in va_list args
+    );
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/balutil/precomp.h b/src/balutil/precomp.h
new file mode 100644
index 00000000..89607416
--- /dev/null
+++ b/src/balutil/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 <bitsmsg.h>
+#include <msi.h>
+#include <wininet.h>
+#include <CommCtrl.h>
+
+#include <dutil.h>
+#include <pathutil.h>
+#include <locutil.h>
+#include <memutil.h>
+#include <strutil.h>
+#include <thmutil.h>
+#include <xmlutil.h>
+
+#include "BootstrapperEngine.h"
+#include "BootstrapperApplication.h"
+#include "IBootstrapperEngine.h"
+#include "IBootstrapperApplication.h"
+
+#include "BAFunctions.h"
+#include "IBAFunctions.h"
+
+#include "balutil.h"
+#include "BalBootstrapperEngine.h"
+#include "balcondition.h"
+#include "balinfo.h"
+#include "balretry.h"