...
int WFrameWidth, TitleBarHeight;

void Get_WFW_TBH()
{
	TopWindow w,w1;
	w.SetRect(10,10,10,10); 
	w.OpenMain();
	w1.SetRect(w.GetRect());
	w1.OpenMain();
	Rect rw=w.GetRect();
	Rect rw1=w1.GetRect();
	WFrameWidth=rw1.left-rw.left; //left-frame thickness
	TitleBarHeight=rw1.top-rw.top;
	w.Close();
	w1.Close();
}