Using Multimedia File I/O

[The feature associated with this page, Multimedia File I/O, is a legacy feature. It has been superseded by Source Reader. Source Reader has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader instead of Multimedia File I/O, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

This section contains examples demonstrating how to perform the following tasks:

• Opening a File with mmioOpen
• Creating and Deleting a File.
• Seeking to a New Position in a File.
• Changing the I/O Buffer Size.
• Accessing a File I/O Buffer.
• Generating Four-Character Codes.
• Creating a RIFF Chunk.
• Searching for a RIFF Chunk.
• Searching for a Subchunk.
• Performing File I/O on RIFF Files.
• Performing Memory File I/O.
• Installing Custom I/O Procedures.
• Sharing an I/O Procedure with Other Applications.