The HDN_ITEMCHANGING notification message notifies a header control’s parent window that the attributes of a header item are about to change. This notification message is sent in the form of a WM_NOTIFY message.
HDN_ITEMCHANGING phdr = (HD_NOTIFY FAR *) lParam;
Returns FALSE to allow the changes or TRUE to prevent them.
file: /Techref/os/win/api/win32/mess/src/msg08_16.htm, 1KB, , updated: 2000/4/7 11:20, local time: 2024/12/4 19:37,
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