This section describes how messages are processed by the default dialog procedure of the file dialog. This standard dialog can be used to provide a common, consistent file selection function.

The file dialog's default procedure can be called using the WinDefFileDlgProc function. A user-provided subclassing dialog procedure should make this call for all messages that it does not process when using the file dialog.

The default dialog procedure of the file dialog sends the messages listed in this section to itself to perform the requested action. This design allows a user-provided dialog procedure to customize the file dialog to its own needs.