MFC中显示一张位图

1、用类CBitmap加载位图

2、创建内存DC， 将位图选进此内存DC

3、调用BitBlt将内存DC的内容拷贝到其它DC(通知是显示DC)

例子（来自MSDN)：

// This OnDraw() handler loads a bitmap from system resources,// centers it in the view, and uses BitBlt() to paint the bitmap// bits.void CBlat2View::OnDraw(CDC* pDC){   CBlat2Doc* pDoc = GetDocument();   ASSERT_VALID(pDoc);   // load IDB_BITMAP1 from our resources   CBitmap bmp;   if (bmp.LoadBitmap(IDB_BITMAP1))   {      // Get the size of the bitmap      BITMAP bmpInfo;      bmp.GetBitmap(&bmpInfo);      // Create an in-memory DC compatible with the      // display DC we're using to paint      CDC dcMemory;      dcMemory.CreateCompatibleDC(pDC);      // Select the bitmap into the in-memory DC      CBitmap* pOldBitmap = dcMemory.SelectObject(&bmp);      // Find a centerpoint for the bitmap in the client area      CRect rect;      GetClientRect(&rect);      int nX = rect.left + (rect.Width() - bmpInfo.bmWidth) / 2;      int nY = rect.top + (rect.Height() - bmpInfo.bmHeight) / 2;      // Copy the bits from the in-memory DC into the on-      // screen DC to actually do the painting. Use the centerpoint      // we computed for the target offset.      pDC->BitBlt(nX, nY, bmpInfo.bmWidth, bmpInfo.bmHeight, &dcMemory,          0, 0, SRCCOPY);      dcMemory.SelectObject(pOldBitmap);   }   else      TRACE0("ERROR: Where's IDB_BITMAP1?\n");}