Timer created with hwnd = NULL do not fire

[chentiangemalc]

1. When using SetTimer(NULL,NULL,,NULL) the WM_TIMER events are not being sent to the Window. I can see OTVDM passing the API Correctly onto the win32 API SetTimer, but using Spy++ to monitor windows messages cannot see any WM_TIMER messages with wParam matching the ID returned by SetTimer being sent to the Window.
   If HWND is specified the timer message is received in WndProc handler (As expected)

Expected behavior
This example code should work., as it does in Windows XP and Windows 10 with NTVDM and the line MessageBox(hwnd,"Hit Timer","Timer!!",MB_OK); should be hit.

UINT myTimer = SetTimer(NULL,NULL,10000,NULL);
               
 printf("Timer created with ID = 0x%08X\n",myTimer);              
BOOL fRetVal = TRUE;

 for(;;)
 {

    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
    {              
       if (msg.message == WM_TIMER && msg.wParam == myTimer )
       {   
       		MessageBox(hwnd,"Hit Timer","Timer!!",MB_OK);   
       }
       
       if (msg.message == WM_QUIT)
          return TRUE;

       TranslateMessage(&msg);
       DispatchMessage(&msg);
    }

Screenshots

Under OTVDM on Windows 10 x86

On the same machine but using NTVDM:

Environment (please complete the following information):

• Tested on Windows 11 (21H2 build 22000.739) x64 and Windows 10 (10.0.19044.1889) x86

[MsgTst.zip](https://github.com/otya128/winevdm/files/9465884/MsgTst.zip)

Traces and test program
[trace.zip](https://github.com/otya128/winevdm/files/9465879/trace.zip)