private void axMxDrawX1_CustomEvent_1(object sender, AxMxDrawXLib._DMxDrawXEvents_CustomEventEvent e)
    {
            if (e.sEventName == "Mx_DeleteLayer")
            {
                // 得到删除的层名.
                MxDrawResbuf param = (MxDrawResbuf)axMxDrawX1.CustomEventParam();
                for (int i = 0; i < param.Count; i++)
                {
                    String sLayerName = param.AtString(i);
                }
            }
    }