void m_cmd_chuc_vu_ItemClick(object sender, ItemClickEventArgs e)
 {
     try
     {
         F110_dm_chuc_vu v_f = new F110_dm_chuc_vu();
         if(IsExistFormName(v_f)) return;
         v_f.MdiParent = this;
         v_f.Show();
     }
     catch(Exception v_e)
     {
         CSystemLog_301.ExceptionHandle(v_e);
     }
 }