void m_cmd_nhom_nguoi_su_dung_ItemClick(object sender, ItemClickEventArgs e) { try { f306_HT_USER_GROUP v_frm = new f306_HT_USER_GROUP(); if(IsExistFormName(v_frm)) return; v_frm.MdiParent = this; v_frm.Show(); } catch(Exception v_e) { CSystemLog_301.ExceptionHandle(v_e); } }