if (OS.SendMessage (handle, OS.LVM_GETCOUNTPERPAGE, 0, 0) <= 0)  return;
public void showSelection () {	checkWidget (); 	int index = OS.SendMessage (handle, OS.LVM_GETNEXTITEM, -1, OS.LVNI_SELECTED);	if (index != -1) OS.SendMessage (handle, OS.LVM_ENSUREVISIBLE, index, 0);}