在MFC中，我想点击一个按钮，然后窗口显示为其他图片

这程序的窗口是个CView类或者继承的视图类吧，绘图都在OnDraw函数里，使用CDC类可以很容易绘图，你能画一个，应该可以画另一个。
我有丰富的VC代码，需要Q我  251700159
给你一个 使用IPICTURE的COM接口显示图片 的例子

void CArEditorView::OnAddPicture()

{

   

    CFileDialog dlg(1,"*.*",NULL,

        OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT|OFN_ENABLESIZING|

                OFN_FILEMUSTEXIST,

        "(*.JPG)|*.JPG|(*.GIF)|*.GIF|(*.BMP)|*.BMP|",this);

    if(dlg.DoModal()==IDCANCEL)

        return;

    str=dlg.GetPathName();



                // 显示图片

                IPicture *pPic;

    IStream *pStm;

   

    CFileStatus fstatus;

    CFile file;

    LONG cb;



   

   

    if (file.Open(t,CFile::modeRead)&&file.GetStatus(t,

        fstatus)&&

        ((cb = fstatus.m_size) != -1))

    {

        HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);

        LPVOID pvData = NULL;

        if (hGlobal != NULL)

        {

            if ((pvData = GlobalLock(hGlobal)) != NULL)

            {

                file.Read(pvData, cb);

                GlobalUnlock(hGlobal);

                CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);

               

                if(SUCCEEDED(OleLoadPicture(pStm,fstatus.m_size,TRUE,IID_IPicture,(LPVOID*

                    )&pPic)))

                {

                    OLE_XSIZE_HIMETRIC hmWidth;

                    OLE_YSIZE_HIMETRIC hmHeight;

                    

                    pPic->get_Width(&hmWidth);

                    pPic->get_Height(&hmHeight);

                    

                    double fX,fY;

                    fX = (double)pDC->GetDeviceCaps(HORZRES)*(double)hmWidth/

                        ((double)pDC->GetDeviceCaps(HORZSIZE)*100.0);

                    fY = (double)pDC->GetDeviceCaps(VERTRES)*(double)hmHeight/

                        ((double)pDC->GetDeviceCaps(VERTSIZE)*100.0);

                    if(FAILED(pPic->Render(*pDC,100,100,200,200,0,hmHeight,

                        hmWidth,-hmHeight,NULL)))

                        AfxMessageBox("Failed To Render The picture!");

                    pPic->Release();

                    

                }

                else

                    AfxMessageBox("Error Loading Picture From Stream!");

            }

        }

    }

    else

        AfxMessageBox("Can't Open Image File!");

}