LB_SELITEMRANGE Overview Group

An application sends an LB_SELITEMRANGE message to select one or more consecutive items in a multiple-selection list box.

LB_SELITEMRANGE 

wParam = (WPARAM) (BOOL) fSelect;   // selection flag 

lParam = MAKELPARAM(wFirst, wLast); // first and last items

Parameters

fSelect: Value of wParam. Specifies how to set the selection. If the fSelect parameter is TRUE, the string is selected and highlighted; if fSelect is zero, the highlight is removed and the string is no longer selected.
wFirst: Value of the low-order word of lParam. Specifies the zero-based index of the first item to select.
wLast: Value of the high-order word of lParam. Specifies the zero-based index of the last item to select.

If an error occurs, the return value is LB_ERR.

Use this message only with multiple-selection list boxes.

This message can select a range only within the first 65,536 items.