Hi, Juan,
I honestly have never tried that, so I don't know if it can be accomplished. Hopefully Craig might have some insight.
At the risk of throwing this in a totally different direction - when you are preparing the data for the report (either in a stored procedure, Fox code, or some other process), can you invoke the DLL at that point to do whatever data manipulation/logic is necessary, and reflect the changes in the report data? Just a thought.
Kevin