PolyPolygon, Polyline, Polygon的简单用法

BOOL rnPolygon(LPPOINT lpPoints, int nCount);rnvoid CExoView::OnDraw(CDC* pDC)nn CPoint Pt[7];n Pt[0] = CPoint(20, 50);n Pt[1] = CPoint(180, 50);n Pt[2] = CPoint(180, 20);n Pt[3] = CPoint(230, 70);n