void m_cmd_nguoi_sd_ItemClick(object sender, ItemClickEventArgs e) { try { f999_ht_nguoi_su_dung v_frm = new f999_ht_nguoi_su_dung(); if(IsExistFormName(v_frm)) return; v_frm.MdiParent = this; v_frm.Show(); } catch(Exception v_e) { CSystemLog_301.ExceptionHandle(v_e); } }