Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Functions for Creating File Previews

The Movie Toolbox provides two functions that allow you to create file previews. File previews contain information that gives the user an idea of a file's contents without opening the file. Typically, a file's preview is a small PICT image (called a thumbnail), but previews may also contain other types of information that is appropriate to the type of file being considered. For example, a text file's preview might tell the user when the file was created and what it discusses. For more information about file previews and how to display them, see "Previewing Files" on page 2-55.

Note

The MakeFilePreview and AddFilePreview functions documented in this section are not listed in the MPW Movies.h interface file; rather, they appear in the MPW ImageCompression.h interface file.

You can use the MakeFilePreview function to create a preview for a file. The AddFilePreview function allows you to add a preview that you have created to a file.