Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Application-Defined Functions / Cover Functions

MyCoverProc

Your cover functions should support the following interface:

pascal OSErr MyCoverProc (Movie theMovie, RgnHandle changedRgn, 
                           long refcon);

theMovie

Specifies the movie for this operation.

changedRgn

Contains a handle to the changed screen region.

refcon

Contains the reference constant that you specified when you defined the progress function.

DESCRIPTION

Your cover function should always return an error value of noErr.