自己从程序中创建位图，然后将其显示出来

void Ctest_display_ddbView::OnDraw(CDC* pDC)
{
 Ctest_display_ddbDoc* pDoc = GetDocument();
 ASSERT_VALID(pDoc);
 if (!pDoc)
  return;

 // TODO: 在此处为本机数据添加绘制代码
 CBitmap Bitmap;

/*

* 如果要创建彩色位图，要用CreateCompatibleBitmap而不是CreateBitmap!!!

*/
 //Bitmap.CreateBitmap(50,50,1,24,NULL);
 Bitmap.CreateCompatibleBitmap(pDC,500,500);

 BITMAP bm;
 Bitmap.GetObject(sizeof(BITMAP),&bm);

 unsigned char *pData =
  new unsigned char [bm.bmHeight * bm.bmWidthBytes];

 /*WORD BitsPerPixel = bm.bmBitsPixel;
 CString strTmp;
 strTmp.Format(_T("%d"), BitsPerPixel);
 AfxMessageBox(strTmp);*/

 for(int y = 0; y < bm.bmHeight; ++y)
 {
  for(int x = 0; x < bm.bmWidth; ++x)
  {
   pData[x * 4 + y * bm.bmWidthBytes] = 0;
   pData[x * 4 + y * bm.bmWidthBytes + 1] = 0;
   pData[x * 4 + y * bm.bmWidthBytes + 2] = 0;
   pData[x * 4 + y * bm.bmWidthBytes + 3] = 0;
  }
 }

 Bitmap.SetBitmapBits(bm.bmHeight * bm.bmWidthBytes, pData);

 //delete pData;

 CDC MemDC;
 MemDC.CreateCompatibleDC(pDC);

 CBitmap *pOldBitmap = MemDC.SelectObject(&Bitmap);

 int nReturned = pDC->BitBlt(10, 10, bm.bmWidth, bm.bmHeight, &MemDC, 0, 0, SRCCOPY);
 //pDC->StretchBlt(0,0, bm.bmWidth, bm.bmHeight, &MemDC,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);

 MemDC.SelectObject(pOldBitmap);

 delete pData;
 UpdateData(false);
}