Using Custom File and Stream Handlers

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 It has been superseded by MediaStreamSource class.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

• Creating a File or Stream Handler
• Creating a Virtual Function Table for a Stream Handler
• Creating an Object Pointer
• Obtaining the Address of a Virtual Function Table
• Creating a File-Handler Instance in a DLL
• Determining Which Interface an Object Supports
• Incrementing the Handler Reference Count
• Deleting an Object