Tom

I you can write .Net code behind excel with the new visual studio 2005
and the visual studio tools for office.
You will have the full .Net enviroment and you can control excel even better
than from excel.
You will have more events etc. etc.
Further more you can use the action pane for your own self made controls.

Visual studio 2005 is now a final beta, so it new but if you need extra info let me know.

Kaak