An application sends an LB_GETCARETINDEX message to determine the index of the item that has the focus rectangle in a multiple-selection list box. The item may or may not be selected.
LB_GETCARETINDEX wParam = 0; // not used; must be zero lParam = 0; // not used; must be zero
This message has no parameters.
The return value is the zero-based index of the list box item that has the focus rectangle. If the list box is a single-selection list box, the return value is the zero-based index of the item that is selected, if any.
file: /Techref/os/win/api/win32/mess/src/msg10_2.htm, 1KB, , updated: 2000/4/7 11:20, local time: 2024/11/4 11:16,
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