Inside Macintosh: QuickTime Components /

Chapter 11 - Clock Components / Clock Components Reference

Movie Toolbox Clock Support Functions /

RemoveCallBackFromTimeBase

Your clock component uses the RemoveCallBackFromTimeBase function to remove a callback event from the list of scheduled callback events. The Movie Toolbox maintains this list.

pascal OSErr RemoveCallBackFromTimeBase (QTCallBack cb);

cb

Specifies the callback event for the operation. Your clock component obtains this value from the parameters passed to your ClockCallMeWhen function (described on page 11-10).

DESCRIPTION

Your component should call the RemoveCallBackToTimeBase function when your ClockCancelCallBack function determines that your component can cancel the callback event (see "Using the Callback Functions" beginning on page 11-8 for more information about the ClockCancelCallBack function).

SPECIAL CONSIDERATIONS

Your component should call the RemoveCallbackFromTimeBase function only for callback events that were successfully added to the schedule with the AddCallBackToTimeBase function (described on page 11-16).

Main | Top of Section | What's New | Apple Computer, Inc. | Find It | Feedback | Help