Creating a Frame Callback Function

The following example is a simple frame callback function. Register this callback by using the capSetCallbackOnFrame macro.

// FrameCallbackProc: frame callback function

// hWnd: capture window handle

// lpVHdr: pointer to struct containing captured

// frame information

//

LRESULT PASCAL FrameCallbackProc(HWND hWnd, LPVIDEOHDR lpVHdr)

{

if (!ghWndMain)

return FALSE;

wsprintf(gachBuffer, "Preview frame# %ld ", gdwFrameNum++);

SetWindowText(ghWndMain, (LPSTR)gachBuffer);

return (LRESULT) TRUE ;

}

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