An application sends an LB_DELETESTRING message to delete a string in a list box.
LB_DELETESTRING
wParam = (WPARAM) index; // index of string to delete
lParam = 0; // not used; must be zero
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.
The return value is a count of the strings remaining in the list. The return value is LB_ERR if the index parameter specifies an index greater than the number of items in the list.
If an application creates the list box with an owner-drawn style but without the LBS_HASSTRINGS style, the system sends a WM_DELETEITEM message to the owner of the list box so the application can free any additional data associated with the item.
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.
List Boxes Overview, List Box Messages, LB_ADDSTRING, LB_INSERTSTRING, WM_DELETEITEM