# File vtk/tk/vtkTkRenderWidget.rb, line 186
  def GetRenderWindow
    addr = Tk.tk_call(self, 'GetRenderWindow')[5..-1]
    renderWindow = Vtk::RenderWindow.new('_%s_vtkRenderWindow_p' % addr)
    renderWindow.UnRegister(nil)
    return renderWindow
  end