function MouseEvent(dX, dY, lType) {
                    if(lType == 3)
                    {
                        // 鼠标右键按下
                        var filter = mxOcx.NewResbuf();

                        // 5020 = RTDXF0,只选择直线实体，设置过滤条件

                        //filter.AddStringEx("LINE",5020);

                        var ent = mxOcx.FindEntAtPoint(dX, dY, filter);

                        var sPopMenu;
                        if(ent != null)
                        {
                            mxOcx.ClearCurrentSelect();
                            mxOcx.AddCurrentSelect(ent.ObjectID,true,true);

                            sPopMenu = mxOcx.GetOcxAppPath() + "\MxPopMenuEnt.mnu"
                        }
                        else
                        {
                            sPopMenu = mxOcx.GetOcxAppPath() + "\MxPopMenu.mnu"
                        }


                        mxOcx.TrackPopupMenu(dX, dY, sPopMenu);
                        // 设置1，表示鼠标事件，不再往下传递.
                        mxOcx.SetEventRet(1);
                        }
                    }