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LegacyUpdate/Compat.cpp

@@ -0,0 +1,39 @@
+#include "stdafx.h"
+#include <comdef.h>
+#include "Utils.h"
+
+typedef BOOL (WINAPI *_Wow64DisableWow64FsRedirection)(PVOID *OldValue);
+typedef BOOL (WINAPI *_Wow64RevertWow64FsRedirection)(PVOID OldValue);
+typedef BOOL (WINAPI *_GetProductInfo)(DWORD, DWORD, DWORD, DWORD, PDWORD);
+
+// XP+
+_Wow64DisableWow64FsRedirection $Wow64DisableWow64FsRedirection = (_Wow64DisableWow64FsRedirection)GetProcAddress(GetModuleHandle(L"kernel32.dll"), "Wow64DisableWow64FsRedirection");
+_Wow64RevertWow64FsRedirection $Wow64RevertWow64FsRedirection = (_Wow64RevertWow64FsRedirection)GetProcAddress(GetModuleHandle(L"kernel32.dll"), "Wow64RevertWow64FsRedirection");
+
+// Vista+
+_GetProductInfo $GetProductInfo = (_GetProductInfo)GetProcAddress(GetModuleHandle(L"kernel32.dll"), "GetProductInfo");
+
+BOOL GetVistaProductInfo(DWORD dwOSMajorVersion, DWORD dwOSMinorVersion, DWORD dwSpMajorVersion, DWORD dwSpMinorVersion, PDWORD pdwReturnedProductType) {
+	if ($GetProductInfo) {
+		return $GetProductInfo(dwOSMajorVersion, dwOSMinorVersion, dwSpMajorVersion, dwSpMinorVersion, pdwReturnedProductType);
+	} else {
+		*pdwReturnedProductType = PRODUCT_UNDEFINED;
+		return FALSE;
+	}
+}
+
+BOOL DisableWow64FsRedirection(PVOID *OldValue) {
+	if ($Wow64DisableWow64FsRedirection) {
+		return $Wow64DisableWow64FsRedirection(OldValue);
+	} else {
+		return TRUE;
+	}
+}
+
+BOOL RevertWow64FsRedirection(PVOID OldValue) {
+	if ($Wow64RevertWow64FsRedirection) {
+		return $Wow64RevertWow64FsRedirection(OldValue);
+	} else {
+		return TRUE;
+	}
+}