boolean hover = focusItem.x <= x && x < (focusItem.x + focusItem.width) && focusItem.y <= y && y < (focusItem.y + getBandHeight());
boolean hover = focusItem.isHover (x, y);
LRESULT WM_LBUTTONUP (int wParam, int lParam) {	LRESULT result = super.WM_LBUTTONUP (wParam, lParam);	if (result == LRESULT.ZERO) return result;	if (focusItem == null) return result;	int x = (short) (lParam & 0xFFFF);	int y = (short) (lParam >> 16);	boolean hover = focusItem.x <= x && x < (focusItem.x + focusItem.width) && focusItem.y <= y && y < (focusItem.y + getBandHeight()); 	if (hover) {		Event event = new Event ();		event.item = focusItem;		sendEvent (focusItem.expanded ? SWT.Collapse : SWT.Expand, event);		focusItem.expanded = !focusItem.expanded;		showItem (focusItem);	}	return result;}