Exit if fail to get instance of DirectX's SystemClock

AppleWin/source/Applewin.cpp

@@ -620,7 +620,7 @@ int APIENTRY WinMain (HINSTANCE passinstance, HINSTANCE, LPSTR lpCmdLine, int)
 
 	// Initialize COM
 	CoInitialize( NULL );
-	SysClk_InitTimer();
+	bool bSysClkOK = SysClk_InitTimer();
 //	DSInit();	// Done when g_hFrameWindow is created (WM_CREATE)
 
 	// DO ONE-TIME INITIALIZATION
@@ -659,7 +659,14 @@ int APIENTRY WinMain (HINSTANCE passinstance, HINSTANCE, LPSTR lpCmdLine, int)
 		MemInitialize();
 		VideoInitialize();
 		FrameCreateWindow();
-	   tfe_init();
+
+		if (!bSysClkOK)
+		{
+			MessageBox(g_hFrameWindow, "DirectX failed to create SystemClock instance", TEXT("AppleWin Error"), MB_OK);
+			break;
+		}
+
+		tfe_init();
         Snapshot_Startup();		// Do this after everything has been init'ed
     
 		if(bSetFullScreen)

AppleWin/source/SoundCore.cpp

@@ -566,7 +566,7 @@ static bool g_bRefClockTimerActive = false;
 static DWORD g_dwLastUsecPeriod = 0;
 
 
-void SysClk_InitTimer()
+bool SysClk_InitTimer()
 {
 	g_hSemaphore = CreateSemaphore(NULL, 0, 1, NULL);		// Max count = 1
 	if (g_hSemaphore == NULL)
@@ -574,7 +574,12 @@ void SysClk_InitTimer()
 
 	if (CoCreateInstance(CLSID_SystemClock, NULL, CLSCTX_INPROC,
                          IID_IReferenceClock, (LPVOID*)&g_pRefClock) != S_OK)
+	{
 		fprintf(stderr, "Error initialising COM\n");
+		return false;	// Fails for Win95!
+	}
+
+	return true;
 }
 
 void SysClk_UninitTimer()

AppleWin/source/SoundCore.h

@@ -40,7 +40,7 @@ void DSUninit();
 LONG NewVolume(DWORD dwVolume, DWORD dwVolumeMax);
 
 void SysClk_WaitTimer();
-void SysClk_InitTimer();
+bool SysClk_InitTimer();
 void SysClk_UninitTimer();
 void SysClk_StartTimerUsec(DWORD dwUsecPeriod);
 void SysClk_StopTimer();