BOOL mmpUpdate(idMovie, hDC, lprectArea)
This function draws the current frame into the given display context. It is normally used to update an invalid rectangle on the stage window.
MMPID idMovie
Identifies the movie ID of the Movie Player instance.
HDC hDC
Identifies the handle to the device context.
LPRECT lprectArea
Points to a RECT data structure that contains the rectangle to be updated.
Returns TRUE if successful, otherwise returns FALSE.