LB_SETANCHORINDEX

An application sends an LB_SETANCHORINDEX message to set the anchor item—that is, the item from which a multiple selection starts. A multiple selection spans all items from the anchor item to the caret item.

LB_SETANCHORINDEX 
wParam = (WPARAM) index; // index to set as anchor 
lParam = 0;              // not used; must be zero 
 

Parameters

index
Value of wParam. Specifies the index of the new anchor item.

Windows 95 and Windows 98: 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.

Return Values

If the message succeeds, the return value is zero.

If the message fails, the return value is LB_ERR.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winuser.h.

See Also

List Boxes Overview, List Box Messages, LB_GETANCHORINDEX