This message selects a string and scrolls it into view, if necessary. When the new string is selected, the list box removes the highlight from the previously selected string.
| Parameter | Description |
| wParam | Contains the index of the string that is selected. If wParam is –1, the list box is set to have no selection. | |
| lParam | Is not used. |
The return value is LB_ERR if an error occurs.
This message should be used only with single-selection list boxes. It cannot be used to set or remove a selection in a multiple-selection list box.