This message is passed to a Movie Player frame-hook callback function before the Movie Player processes the text in the movie script channel.
WORD wParam
Specifies the frame index.
LONG lParam
Specifies a far pointer to a null-terminated character buffer containing the script-channel text for this frame.
Return FALSE to direct the Movie Player to process the script text for the frame. Return TRUE to indicate that the callback function handled the script text and that the Movie Player should ignore it.
mmpSetFrameHook, mmpGetFrameHook, MMP_HOOK_FRAME