I read in a thread from back in September that you could only access a single column that has its Aggregate property set to 'Custom'. I've been looking at the properties of the GridCustomAggregateEventArgs object that's passed into my CustomAggregate event handler and notice that there's an ItemIndex property, however it doesn't seem to change from the value -1. What's the suggested method for accessing the index (or, preferably, UniqueName) of the column for which the CustomAggregate event is firing?