A Pattern object that defines the pattern/borders to be shown on the frame.
By default, the frame shows a thick-black border around the
nodes, so the Pattern.Type property is
ShowOnBackground property specifies whether the frame is shown on the back or
front of the chart. The Visible property shows
or hides a specified frame.
The following screen shot shows a pattern
on the node:
following screen shot shows a pattern on the frame: