public void OnActivate(IDrawingSurface drawingService)
 {
     drawingService.GetControl().Cursor = Cursors.Arrow;
     this.drawingSurface = drawingService;
     this.dragHelper     = null;
 }
 public void OnActivate(IDrawingSurface drawingService)
 {
     drawingService.GetControl().Cursor = Cursors.Arrow;
     this.drawingSurface = drawingService;
     this.dragHelper = null;
 }