your best bet might be to resort to code. Most experienced help here kinda disavows macros so we're not that knowledgeable with the finer points. You could use the macro to run this code but I think it would be easier/best to let the report OnFormat event take care of it. It would probably be easy enough to find code you can copy and adapt.
If you want to stick with the macro route for now, then I think your control name line would be Reports!rptNameOfYourReport.Section(i) where i is the number of the section. Detail section is 0 IIRC (or you could probably use acDetail instead of 0). You could also post a zipped copy of your db and someone could likely figure out the macro route or just provide you with the code version.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.