struct ArrayCtrlTip : ArrayCtrl {
	virtual void MouseMove(Point p, dword d)
	{
		int i = GetLineAt(p.y + GetScroll());
		if(!IsNull(i)) 
			Tip(String("You are in row " + i));
		ArrayCtrl::MouseMove(p, d);
	}
	typedef ArrayCtrlTip CLASSNAME;
};