ADO----nDSN

    //////////////链接数据库 非DSN模式/////////////////////////////
    //CString strOpen="DSN=DBAddressBook;UID=sa;PWD=123456";
    //m_pConnection.CreateInstance(__uuidof(Connection));
    //m_pConnection->Open("Provider=SQLOLEDB;SERVER=R-PC;DATABASE=;UID=;PWD=;","","",-1);
    
    //try
    //{
    //    m_pConnection.CreateInstance("ADODB.Connection");              //创建连接对象实例
        //_bstr_t strConnect="Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Restaurant;Data Source=(教师机\SQLEXPRESS)";
        //_bstr_t strConnect="driver={SQL Server};Server=R-PC;DATABASE=DBAdressBook;UID=sa;PWD=123456";
        //m_pConnection->Open(strConnect,"","",adModeUnknown);         //打开数据库
    //}
    //catch (_com_error e)                                            //捕捉错误
    //{
        //AfxMessageBox(e.Description());                             //弹出错误
    //}

  try
  {
       m_pConnection.CreateInstance("ADODB.Connection");
       _bstr_t strConnect="Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=DBAdressBook;Data Source=xxxx";
       //_bstr_t strConnect="driver={SQL Server};Server=xxxx;DATABASE=DBAdressBook;UID=sa;PWD=xxxxx";
       m_pConnection->Open(strConnect,"","",adModeUnknown);
       AfxMessageBox("连接成功");
  }
  catch(_com_error e)
  {
      AfxMessageBox("连接失败");
  }
//////////////////////////////////////////