Infragistics Grid Expanders

When using the Ultragrid; imagine you have a Year band and then there is a plus sign next to it, you click the expander and then you have the month bands show up in a set of insetted rows. That works just fine and dandy. But say you want to get rid of the plus sign if there are no detail records, anyone know how to do that?
[325 byte] By [codefund.com] at [2007-12-16]