The CDN_HELP notification message is sent by an Explorer-style Open or Save As common dialog box when the user clicks the Help button. Your OFNHookProc hook procedure receives this message in the form of a WM_NOTIFY message.
CDN_HELP lpon = (LPOFNOTIFY) lParam;
The OFNOTIFY structure contains an NMHDR structure whose code member indicates the CDN_HELP notification code.
The return value is ignored.
The system sends this notification only if the dialog box was created using the OFN_EXPLORER value.
GetOpenFileName, GetSaveFileName, NMHDR, OFNHookProc, OFNOTIFY, OPENFILENAME, WM_NOTIFY
file: /Techref/os/win/api/win32/mess/src/msg03_5.htm, 1KB, , updated: 2000/4/7 12:19, local time: 2024/8/25 02:28,
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