The LVM_SETITEMCOUNT message prepares a list view control for adding a large number of items. You can send this message explicitly or by using the ListView_SetItemCount macro.
LVM_SETITEMCOUNT wParam = (WPARAM) (int) cItems; lParam = 0;
No return value.
By sending the LVM_SETITEMCOUNT message before adding a large number of items, you enable a list view control to reallocate its internal data structures only once rather than every time you add an item.
file: /Techref/os/win/api/win32/mess/src/msg13_1.htm, 1KB, , updated: 2000/4/7 12:20, local time: 2024/9/4 05:29,
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