>Ed,
>
>>Yes, I know, but it does not go to MTS, right?
>
>That I do not know, I've not done any MTS yet. I didn't think that MTS has anything to do with the UI, the UI uses MTS as a data transfer layer, right?

Not really just data transfer. You put your business logic in the COM DLL and run it in MTS. This can be validation, etc...not just transfering data.