CFileDialog::OnFileNameChange
Override this method if you want to handle the WM_NOTIFY CDN_SELCHANGE message.
virtual void OnFileNameChange( );
Remarks
The system sends the CDN_SELCHANGE message when the user selects a new file or folder in the file list of the Open or Save As dialog box. Override this method if you want to perform any actions in response to this message.
The system sends this message only if the dialog box was created with the OFN_EXPLORER flag turned on. For more information about the notification, see CDN_SELCHANGE. For information about the OFN_EXPLORER flag, see the OPENFILENAME structure and Open and Save As Dialog Boxes.
Requirements
Header: afxdlgs.h