程序代码：

        CDialog::OnPaint();
        CClientDC dc(this);
        CDC *mdc=new CDC;
        mdc->CreateCompatibleDC(&dc);
        CBitmap bitmap;
        bitmap.LoadBitmap(IDB_BITMAP1);
        mdc->SelectObject(bitmap);
        CRect rect;
        GetClientRect(&rect);
        dc.BitBlt(0,0,80,105,mdc,0,0,SRCCOPY);
        dc.BitBlt(20,0,80,105,mdc,0,0,SRCCOPY);