Handle to a video played in a video player

[C++ Programming]

Hi,

I have a video playing in a video player. Irrespective of video player, I need the handle to the video being played. I have user-specified screen co-ordinates, now I need to convert the screen co-ordinates into frame co-ordinates of the video. To convert screen co-ordinates to video-frame co-ordinates and to further process video frames, I need handle to the video.

I am using Visual Studio and C++ for Win32 programming.

Any pointer?

Thanks