在对话框中添加图片， 画矩形，写文字， 设置透明背景

 

void CShowresult::OnPaint()

{

      CPaintDC dc(this); // device context for painting

      // 载入图片

      RECT rect;

      CDC *mdc= new CDC;

      CBitmap *bitmap= new CBitmap;

    GetClientRect (&rect);

      mdc->CreateCompatibleDC(&dc);

      bitmap->m_hObject = (HBITMAP)::LoadImage(NULL,"zuobiao.bmp",

           IMAGE_BITMAP, rect.right, rect.bottom, LR_LOADFROMFILE);

      mdc->SelectObject(bitmap);

      dc.BitBlt(0,0, rect.right, rect.bottom, mdc, 0, 0, SRCCOPY);

 

//  画矩形，并填充颜色

CBrush * brush=new CBrush (RGB(200,100,255));

    CBrush * pOldBrush= dc.SelectObject (brush);

    dc.Rectangle(0,0,10,10);

       dc.SelectObject (pOldBrush);

       delete brush;

    // 或者

      CBrush brush;            

    brush.CreateSolidBrush(RGB(200,100,255));  

       CBrush * pOldBrush= dc.SelectObject (&brush);

                                                    dc.Rectangle(start,280,start+20,284);

      dc.SelectObject (pOldBrush);

      brush.DeleteObject();

   // 写文字

      dc.TextOut(0, 0, str);

   // 透明背景

   dc.SetBkMode(TRANSPARENT);

   // Do not call CDialog::OnPaint() for painting messages

}