An application sends an LB_GETSEL message to retrieve the selection state of an item.
LB_GETSEL wParam = (WPARAM) index; // item index lParam = 0; // not used; must be zero
Windows 95: The wParam parameter is limited to 16-bit values. This means list boxes cannot contain more than 32,767 items. Although the number of items is restricted, the total size in bytes of the items in a listbox is limited only by available memory.
If an item is selected, the return value is greater than zero; otherwise, it is zero. If an error occurs, the return value is LB_ERR.
|file: /Techref/os/win/api/win32/mess/src/msg10_10.htm, 1KB, , updated: 2000/4/7 12:20, local time: 2022/9/27 03:18,
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