Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Application-Defined Functions / Movie Callout Functions

MyCalloutProc

Your movie callout function should present the following interface:

pascal Boolean MyCallOutProc (long refcon);

refcon

Contains the reference constant that you specified when you called the PlayMoviePreview function.

DESCRIPTION

Your movie callout function returns a Boolean value. The Movie Toolbox examines this value before continuing. If your function sets this value to false, the Movie Toolbox stops the preview and returns to your application.

Note

If you call the GetMovieActiveSegment function (described on page 2-122) from within your movie callout function, the Movie Toolbox will have changed the active movie segment to be the preview segment of the movie. The Movie Toolbox restores the active segment when the preview is done playing.