哪里错了？

Question

selectobject()要得是一个CBitmap*不是hbitmap

Answer 1

hBitmap = (HBITMAP) ::LoadImage(AfxGetInstanceHandle(), (LPCTSTR) strBmpFile, 
IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
hOldBitmap = (HBITMAP) ::SelectObject(cMemDC.m_hDC, hBitmap);
pDC->BitBlt(rcTab.left, rcTab.top,
rcTab.Width(), rcTab.Height(), &cMemDC,
0, 0, SRCCOPY);
::SelectObject(cMemDC.m_hDC, hOldBitmap);
::DeleteObject(hBitmap);

Answer 2

// just a demo, you can reference it   HBITMAP bitmap;
   /////读取位图文件SAMPLE.BMP
   bitmap=(HBITMAP)LoadImage(AfxGetInstanceHandle(),"SAMPLE.BMP",IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
   ASSERT(bitmap);
   HBITMAP OldBitmap;
   CDC MemDC;CRect rect;
   MemDC.CreateCompatibleDC(&dc);
   GetClientRect(rect);
   OldBitmap=(HBITMAP)MemDC.SelectObject(bitmap);
   ///显示它
   dc.BitBlt(20,20,rect.Width()-20,rect.Height()-20,&MemDC,0,0,SRCCOPY);
   MemDC.SelectObject(OldBitmap);

Answer 3

hBmp.GetBitmap(&bm);//这里应该用一个CBitmap对象来引导
可以用CBitmap m_bitmap.Attach(hBmp);
m_bitmap.GetBitmap(&bm);然后CBitmap* pOldBitmap = dcImage.SelectObject(&m_bitmap);

Answer 4

HANDLE to CGDIObject
pObject = CGDIObject::FromHandle( handle );CGDIObject to HANDLE 
handle = pObject->GetSafeHandle( );