void m_cmd_luong_hs_athk_ItemClick(object sender, ItemClickEventArgs e) { try { f301_tinh_thu_nhap_khac v_frm = new f301_tinh_thu_nhap_khac(); if(IsExistFormName(v_frm)) return; v_frm.MdiParent = this; v_frm.Show(); } catch(Exception) { throw; } }