newBits = OS.LVS_EX_GRIDLINES;
public void setLinesVisible (boolean show) {	checkWidget ();	int newBits = 0;	if (show) {		newBits = OS.LVS_EX_GRIDLINES;		int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);			if ((bits & OS.LVS_NOCOLUMNHEADER) == 0) fixItemHeight (true);	}	OS.SendMessage (handle, OS.LVM_SETEXTENDEDLISTVIEWSTYLE, OS.LVS_EX_GRIDLINES, newBits);}