How do I selectively change cursor over chart DataSeriesItem?

Some - but not all - of the DataSeriesItems shown in my Chart can show additional information in a Window when the user clicks them (I have a PointClickListener that already does that). To let the user know when they’re over such an item, I would like to change the cursor. Can someone suggest how that can be done programmatically (or point me to an example?) I checked all the chart demo examples but don’t see any that change the cursor.

Thanks in advance for all help.