VC双画布消除屏幕闪烁实例详解

CDC m_dcMem;              //创建内存画布

  CBitmap m_bmpMemDC;         //创建内存画布的

//初始化内存画布

CDC* pDC = GetDC();

 if(pDC->GetSafeHdc())

  {

  if(!m_dcMem.CreateCompatibleDC(pDC))

   {

    ReleaseDC(pDC);

   return;

   }

  if(!m_bmpMemDC.CreateCompatibleBitmap(pDC, rect.Width(), rect.Height()))

   {

    ReleaseDC(pDC);

   return;

   }

   m_dcMem.SelectObject(&m_bmpMemDC);

   ReleaseDC(pDC);

//把图像画到内存画布上

//内存画布映射到屏幕

pDC->BitBlt(0,0,rect.Width(),rect.Height(),&m_dcMem,0,0,SRCCOPY);