2 files changed, 23 insertions, 0 deletions

diff --git a/src/libs/dutil/WixToolset.DUtil/inc/dutilsources.h b/src/libs/dutil/WixToolset.DUtil/inc/dutilsources.h
index 6affb392..f1dd5d1a 100644
--- a/src/libs/dutil/WixToolset.DUtil/inc/dutilsources.h
+++ b/src/libs/dutil/WixToolset.DUtil/inc/dutilsources.h
@@ -62,6 +62,7 @@ typedef enum DUTIL_SOURCE
     DUTIL_SOURCE_XMLUTIL,
     DUTIL_SOURCE_VERUTIL,
     DUTIL_SOURCE_WNDUTIL,
+    DUTIL_SOURCE_ENVUTIL,
 
     DUTIL_SOURCE_EXTERNAL = 256,
 } DUTIL_SOURCE;
diff --git a/src/libs/dutil/WixToolset.DUtil/inc/envutil.h b/src/libs/dutil/WixToolset.DUtil/inc/envutil.h
new file mode 100644
index 00000000..8491b27b
--- /dev/null
+++ b/src/libs/dutil/WixToolset.DUtil/inc/envutil.h
@@ -0,0 +1,22 @@
+#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
+
+/********************************************************************
+ EnvExpandEnvironmentStrings - Wrapper for ::ExpandEnvironmentStrings.
+
+ *******************************************************************/
+HRESULT DAPI EnvExpandEnvironmentStrings(
+    __in LPCWSTR wzSource,
+    __out LPWSTR* psczExpanded,
+    __out_opt SIZE_T* pcchExpanded
+    );
+
+#ifdef __cplusplus
+}
+#endif
+