Sets the focus rectangle to the item at the specified index in a multiple-selection list box. If the item is not visible, it is scrolled into view.
Specifies the zero-based index of the list box item that is to receive the focus rectangle.
Windows 95/Windows 98/Windows Millennium Edition (Windows Me) : 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 list box is limited only by available memory.
If this value is FALSE, the item is scrolled until it is fully visible; if it is TRUE, the item is scrolled until it is at least partially visible.
If an error occurs, the return value is LB_ERR (-1). Otherwise, LB_OKAY (0) is returned.
If this message is sent to a single-selection list box that does not contain a selected item, the caret index is set to the item specified by the wParam parameter. If the single-selection list box does contain a selected item, the list box returns LB_ERR.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|