兴奋啊，原来mfc中的单文档和对话框的代码是通用的啊！！！画图程序

 

//在单文档或对话框中的ondraw,onpaint函数中加入以下代码

CDC* pDC=GetDC();//定义pDC 单文档中可以不定义
  CPen pen[5];
  pen[0].CreatePen(PS_SOLID,3,RGB(255,0,0));//创建实线画笔
  pen[1].CreatePen(PS_DASH,1,RGB(0,255,0));//创建虚线画笔
  pen[2].CreatePen(PS_DOT,1,RGB(0,0,255));//点线
  pen[3].CreatePen(PS_DASHDOT,1,RGB(0,255,255));//点划线
  pen[4].CreatePen(PS_DASHDOTDOT,1,RGB(255,0,255));//双点划线
  CPen *pOldPen;
  pOldPen=pDC->SelectObject(&pen[0]);
  pDC->Rectangle(10,10,110,110);
  pDC->TextOut(10,115,"绘制矩形");
  
  pDC->SelectObject(&pen[1]);
  CPoint pts[]={CPoint(190,20),CPoint(200,60),CPoint(270,40),CPoint(210,80),CPoint(250,100),CPoint(300,3),CPoint(310,80)};
  pDC->Polyline(pts,7);
  pDC->TextOut(180,115,"绘制多段折线");
  
  pDC->SelectObject((&pen[2]));
  pDC->Ellipse(10,140,160,240);
  pDC->SelectObject(&pen[3]);
  pDC->Pie(20,150,150,230,160,160,10,160);
  pDC->SelectObject(&pen[4]);
  pDC->Arc(20,150,150,230,10,220,160,220);
  pDC->TextOut(10,245,"绘制椭圆，弧线和饼图");
  pDC->SetTextColor(RGB(0,0,255));
  
  pDC->TextOut(220,200,"使用不同的画笔绘制各种图形");
  
  pDC->SelectObject(pOldPen);
  for(int i=0;i<5;i++)
  {
   pen[i].DeleteObject();
   
  }