Adding border around pie chart pieces using VBA

[jfgreen123]

I have written some code to create and format pie charts, but I can't find how to add a border around each piece of pie. Excel generates the pie chart with only a default interior colour, and no border to each piece. As one piece needs to be white a border is critical to see it against the white sheet.
Manually you can select Format Data Series and adjust Border Colours and Border Styles.
In VBA I can't get it to accept a Border against the SeriesCollection.
How can I add and format a border to the pie chart pieces?
Thanks