public override void OnMouseDown(int Button, int Shift, int X, int Y)
        {
            IActiveView pActView = m_hookHelper.ActiveView;
            IScreenDisplay pScreen = pActView.ScreenDisplay;
            IRubberBand pRubber = new RubberPolygonClass();
            IPolygon pPolygon = pRubber.TrackNew(pScreen, null) as IPolygon ;
            IArea pArea = pPolygon as IArea;
            double dArea =  pArea.Area;
            MessageBox.Show(“面积为：” + dArea);
            
        }

版权声明：本文为mynama原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://www.cnblogs.com/mynama/archive/2008/05/03/1180939.html