private void OnExtentDefined(object sender, ExtentDraggedBoxEventArgs e)
 {
     txtMaxLat.Text   = e.Top.ToString();
     txtMinLat.Text   = e.Bottom.ToString();
     txtMinLon.Text   = e.Left.ToString();
     txtMaxLon.Text   = e.Right.ToString();
     _selectionExtent = new Extents();
     _selectionExtent.SetBounds(e.Left, e.Bottom, 0, e.Right, e.Top, 0);
     if (!e.InDrag)
     {
         MakeGridFromPoints.MakeExtentShapeFile();
     }
 }
 private void OnExtentCreated(Grid25MajorGrid s, ExtentDraggedBoxEventArgs e)
 {
     GridMapStatusUpdate(e.Top, e.Left, e.Right, e.Bottom, e.InDrag);
 }