private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
        {
            IActiveView m_activeview = axMapControl1.Map as IActiveView;
            IPoint point = new PointClass();
            System.Drawing.Point p = System.Windows.Forms.Cursor.Position;

            this.toolStripStatusLabel1.Text = "X: " + System.Convert.ToString(p.X) + "  Y: " + System.Convert.ToString(p.Y);

            point = m_activeview.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
            label5.Text = "X: " + Convert.ToString(point.X) + " Y: " + Convert.ToString(point.Y);
           
             double w ;

                    w = 40 ;
                 
               
                label6.Text = "大小值：" + Convert.ToString(w);
         
               
        }