Test

launcher/Options.c

@@ -0,0 +1,40 @@
+#include <windows.h>
+#include "Exec.h"
+#include "VersionInfo.h"
+#include "Wow64.h"
+
+void LaunchOptions(int nCmdShow) {
+#if !_WIN64
+	// Some issues arise from the working directory being SysWOW64 rather than System32. Notably,
+	// Windows Vista - 8.1 don't have wuauclt.exe in SysWOW64. Disable WOW64 redirection temporarily
+	// to work around this.
+	PVOID oldValue;
+	BOOL isRedirected = DisableWow64FsRedirection(&oldValue);
+#endif
+
+	HRESULT hr;
+
+	if (AtLeastWin10()) {
+		// Windows 10+: Open Settings app
+		hr = Exec(NULL, L"ms-settings:windowsupdate-options", NULL, NULL, SW_SHOWDEFAULT, FALSE, NULL);
+	} else if (AtLeastWinVista()) {
+		// Windows Vista, 7, 8: Open Windows Update control panel
+		WCHAR wuauclt[MAX_PATH];
+		ExpandEnvironmentStrings(L"%SystemRoot%\\System32\\wuauclt.exe", wuauclt, ARRAYSIZE(wuauclt));
+		hr = Exec(NULL, wuauclt, L"/ShowOptions", NULL, SW_SHOWDEFAULT, FALSE, NULL);
+	} else {
+		// Windows 2000, XP: Open Automatic Updates control panel
+		WCHAR wuaucpl[MAX_PATH];
+		ExpandEnvironmentStrings(L"%SystemRoot%\\System32\\wuaucpl.cpl", wuaucpl, ARRAYSIZE(wuaucpl));
+		hr = Exec(NULL, wuaucpl, NULL, NULL, SW_SHOWDEFAULT, FALSE, NULL);
+	}
+
+#if !_WIN64
+	// Revert WOW64 redirection if we changed it
+	if (isRedirected) {
+		RevertWow64FsRedirection(oldValue);
+	}
+#endif
+
+	PostQuitMessage(hr);
+}