making a absolute overlapped window, even overlap games

Code:

---

        hwnd = CreateWindowEx(
                WS_EX_TOPMOST ,
                "myWindowClass",
                "The title of my window",
                WS_OVERLAPPEDWINDOW,
                CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
                NULL , NULL, hInstance, NULL);
       
       
       
       
       
        SetWindowPos(hwnd,HWND_TOPMOST,0,0,0,0,SWP_NOOWNERZORDER);

---

how do i make an absolute overlapping window that overlaps everything, even games like "call of duty" that insist on overlapping all other windows? i need to create a overlapped desktop timer for the cybercafe where games can see the time remaining before they have to pay up. the above code overlaps most window but not the games ones

You won't be able to do that for a Direct-X game - as you already know.
Direct-X games have direct access to the video ram and can change screen resolutions, etc...

I would ask the folks over in the Game programming forum or search the web for similiar apps that game players have developed.

gg