VC6新建一个多文档项目；根据窗口标题的最后数字，绘制不同图形；

void CPrdView::OnDraw(CDC* pDC)
{
	CPrdDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CString str1 = pDoc->GetTitle();
	CPoint pt[4];
	//起点
    pt[0].x = 20;
    pt[0].y = 20; 
	//第一条线终点
    pt[1].x = 20;
    pt[1].y = 160; 
	//第二条线终点
    pt[2].x = 150;
    pt[2].y = 140; 
	//回到起点
    pt[3].x = 20;
    pt[3].y = 20;
	CRgn rgn;
	CBrush brush;

	int ti = atoi(str1.Right(1));
	switch(ti)
	{
	case 1:
		pDC->Rectangle(5,5,150,150);
		break;
	case 2:
		pDC->Ellipse(5,5,150,150);
		break;
	case 3:
		pDC->Ellipse(5,5,250,150);
		break;
	case 4:
		pDC->Arc(5,5,250,100,5,100,250,100);
		break;
	case 5:		 
		pDC->Polygon(pt,3);
		break;
	case 6:
        rgn.CreatePolygonRgn( pt, 3, ALTERNATE); //创建区域  
        brush.CreateSolidBrush( RGB( 0, 255, 0 ) ); //创建画刷
        pDC->FillRgn( &rgn, &brush ); 
		break;
	default:
		break;
	}
}