The HDM_INSERTITEM message inserts a new item into a header control. You can send this message explicitly or by using the Header_InsertItem macro.
HDM_INSERTITEM wParam = (WPARAM) (int) index; lParam = (LPARAM) (const HD_ITEM FAR*) phdi;
If the operation succeeds, the return value is the index of the new item.
If the operation fails, the return value is - 1.
|file: /Techref/os/win/api/win32/mess/src/msg08_9.htm, 1KB, , updated: 2000/4/7 12:20, local time: 2022/8/7 23:55,
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