Movie Player messages are sent to a frame callback function to notify the application that a movie frame has been advanced and to send script-channel text to an application. Use these messages to get frame-advance information:
MMP_HOOK_FRAME
Sent to a frame callback function after the Movie Player completes screen updates for the frame or subframe.
MMP_HOOK_SCRIPT
Sent to a frame callback function before the Movie Player processes the script-channel text for the frame.