VIDEO AND BITMAPS

Does anybody know how to retrieve and display a bitmap from video stream capture using the WIN32 API callback function :
LRESULT CALLBACK VideoStreamCallback(HWND hWndC, LPVIDEOHDR lpVHdr).
So far I have obtained BITMAPINFO structure from the video capture driver using:
dwSize = capGetVideoFormatSize(hWndC);
bmi = (BITMAPINFO*) malloc(dwSize);
capGetVideoFormat(hWndC,bmi,dwSize);
I would be really grateful to know where to go from here.