Here is a reason why can not log a SQL CString

Becuse the SQL CString are used by SQL server that will cloch it and use,if you want to read,not permit;
only copy it to avoid it! This have waste my Half a day to find it!
by using :
updateStr+=" where ±àÂë='"+m_fnbm+"'";
    //AfxMessageBox(updateStr);
    //logHere("update:"+updateStr);
    CString info;
 char *ps1=updateStr.GetBuffer(updateStr.GetLength());
 char *ps2=info.GetBuffer(updateStr.GetLength());
 strcat(ps2,ps1);
          // AfxMessageBox(info);
      logHere(info);
    db2.ExecuteSQL(updateStr);
is ok!