用_ConnectionPtr怎么访问不同ip段的数据库？请前辈赐教！

bool SetupDlg::Open0Data(CString Aip,CString AName,CString AUser,CString Akey)
{
    // TODO:打开目标源数据库
    
    CString m_Con;
    try
    {
        if (m_OConnection!=NULL)
        {
            m_OConnection->Close();
            m_OConnection=NULL;
        }
        m_Con = "Provider=SQLOLEDB;Server=";
        m_Con = m_Con + Aip;
        m_Con = m_Con + _T(";Database=");
        m_Con = m_Con + AName;
        m_Con = m_Con + _T(";UID=");
        m_Con = m_Con + AUser;
        m_Con = m_Con + _T(";PWD=");
        m_Con = m_Con + Akey;

        m_OConnection.CreateInstance(__uuidof(Connection));
        m_OConnection->Open((_bstr_t)m_Con,"","",adModeUnknown);

        return true;
    }
    catch(_com_error e)
    {
        return false;
    }
}