//该学生已经登录,返回提示信息
   memset(sendBuf,0,1024);
   strcpy(sendBuf,"The Account has been Logined!");
  }
  else
  {
   //查询数据库,验证该学生信息是否正确
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   CString accountSql = "select * from StudentInfo where StuID = '" + m_account + "'";
   RECORDSET rs = db.JExecuteWithRecordset(accountSql);
   BOOL accountExist = FALSE;
   if (rs != NULL)
   {
    while (!rs->rsEOF)
    {
     accountExist = TRUE;
     rs->MoveNext();
    }
   }
   if (accountExist)
   {
CString passwdSql = "select * from StudentInfo where StuID = '" + m_account + "' and Passwd = '" + m_password + "'"; //查询数据库
    RECORDSET rs1 = db.JExecuteWithRecordset(passwdSql);
    BOOL passwdCorrect = FALSE;
    if (rs1 != NULL)
    {
     while (!rs1->rsEOF)
     {
      passwdCorrect = TRUE;
      rs1->MoveNext();
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