CRect rect;  //定义矩形

    GetClientRect(&rect);  //获得客户区矩形

    pDC->SetMapMode(MM_ANISOTROPIC);  //设置映射模式

    pDC->SetWindowExt(rect.Width(),rect.Height());  //设置窗口

    pDC->SetViewportExt(rect.Width(),-rect.Height());  //设置视区：x轴水平向右为正，y轴垂直向上为正

    pDC->SetViewportOrg(rect.Width()/,rect.Height()/);  //设置客户区中心为坐标系原点

    rect.OffsetRect(-rect.Width()/,-rect.Height()/);  //客户区矩形校正

    pDC->SetTextColor(RGB(,,));  //字体颜色为红色

    pDC->SetBkColor(RGB(,,));  //背景色：红+绿=黄

    pDC->TextOut(-,,"Computer Graphics Based on VC++");  //输出文本1

    CString data,str="BoChuang Research Institute";

    data.Format("%s",str);  //输出文本2

    pDC->TextOut(,,data);

    pDC->SetTextColor(RGB(,,));

    pDC->SetBkMode(TRANSPARENT);  //设置背景模式，透明

    int i1=,i2=;

    double d1=5.2,d2=8.3;

    data.Format("%d,%d",i1,i2);  //输出整数

    pDC->TextOut(-,-,data);

    data.Format("%f,%f",d1,d2);  //输出小数

    pDC->TextOut(,-,data);

    CRect rect;  //定义矩形

    GetClientRect(&rect);  //获得客户区矩形

    pDC->SetMapMode(MM_ANISOTROPIC);  //设置映射模式

    pDC->SetWindowExt(rect.Width(),rect.Height());  //设置窗口

    pDC->SetViewportExt(rect.Width(),-rect.Height());  //设置视区：x轴水平向右为正，y轴垂直向上为正

    pDC->SetViewportOrg(rect.Width()/,rect.Height()/);  //设置客户区中心为坐标系原点

    rect.OffsetRect(-rect.Width()/,-rect.Height()/);  //客户区矩形校正

    CPoint ld,rt;  //定义椭圆形外接矩形的左下角点与右上角点坐标

    /*绘制外部黑色椭圆*/

    ld=CPoint(-,-),rt=CPoint(,);

    CBrush NewBrush,*pOldBrush;

    NewBrush.CreateSolidBrush(RGB(,,));

    pOldBrush=pDC->SelectObject(&NewBrush);

    pDC->Ellipse(CRect(ld,rt));

    pDC->SelectObject(pOldBrush);

    NewBrush.DeleteObject();

    /*绘制外部白色圆*/

    ld=CPoint(-,-),rt=CPoint(,);

    pDC->Ellipse(CRect(ld,rt));

    /*绘制内部黑色圆*/

    ld=CPoint(-,-),rt=CPoint(,);

    NewBrush.CreateSolidBrush(RGB(,,));

    pOldBrush=pDC->SelectObject(&NewBrush);

    pDC->Ellipse(CRect(ld,rt));

    pDC->SelectObject(pOldBrush);

    NewBrush.DeleteObject();

    /*绘制内部白色圆*/

    ld=CPoint(-,-),rt=CPoint(,);

    pDC->Ellipse(CRect(ld,rt));