Hi Petr

Thanks for the suggestion, but I don't really want to rework my addin to be
a pseudo addin workbook. It would also screw up my existing users. My addin
only has three UDFs so recognizing the workbook name only wouldn't give me a
huge performance benefit.

I'm working on some VBA code and hopefully the whole process shouldn't be
too difficult. Other suggestions are still welcome, just in case I'm missing
something.

Thanks away

Dave