Knowing What Point is Selected on a Chart

[Bill]

Hello,
Try this again. No response before. May not be possible. I would like to
select a single point on a chart, then select a button that will call the
following subroutine:

AddCommenttoPoint(ByVal ElementID As Long, ByVal Arg1 As Long, ByVal Arg2 As
Long)

The elementID is XlSeries, Arg1 is the first series collection. The problem
I have is Arg2. I want that to be the data point that is selected on the
series. How do I determine which data point is selected on a series
collection using code? The Selected property does not work with the series
collection.

Thanks a lot.

Bill