I'm using Excel from Office 2013:

I want to query the user as to which function of 3-choices to run. I'm
currently set up to select a range of data using the mouse, then run the
proper 1 of 3 functions against the selection.

I suspect I get the selection up front, maybe dropdown list if that is
possible, then that code executes on the selection. That would be nice if
possible.

Thanks