An application sends an LB_SETCURSEL message to select a string and scroll it into view, if necessary. When the new string is selected, the list box removes the highlight from the previously selected string.
LB_SETCURSEL 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 error occurs, the return value is LB_ERR. If the index parameter is -1, the return value is LB_ERR even though no error occurred.
Use this message only with single-selection list boxes. You cannot use it to set or remove a selection in a multiple-selection list box.