程序代码：

char *pBuf;
DWORD dwFileLen;
//FileInfo staff;
void CHanjxDlg::OnOpenFile() 
{
    // TODO: Add your control notification handler code here    
    //filename=openfile.GetFileName();

    CFileDialog fileDlg(TRUE);
    fileDlg.m_ofn.lpstrFilter="Text Files(*.doc)\0*.doc\0*.jpg\0All File(*.*)\0*.*\0\0";
    //fileDlg.m_ofn.lpstrDefExt="doc";
    if (IDOK==fileDlg.DoModal())
    {
        CFile file(fileDlg.GetFileName(),CFile::typeBinary);
        //char *pBuf;
        //DWORD dwFileLen;
        dwFileLen=file.GetLength();
        pBuf=new char[dwFileLen+1];
        pBuf[dwFileLen]=0;
        file.Read(pBuf,dwFileLen);
        file.Close();
        //MessageBox(pBuf);
    }    
}

void CHanjxDlg::OnSend() 
{
    // TODO: Add your control notification handler code here
    CFileDialog fileDlg(FALSE);
    fileDlg.m_ofn.lpstrFilter="Text Files(*.doc)\0*.doc\0All File(*.*)\0*.*\0\0";
    
    if (IDOK==fileDlg.DoModal())
    {
        CFile file(NULL,CFile::modeWrite);
        file.Write(pBuf,dwFileLen);
        file.Close();
        //MessageBox(pBuf);
    }
}