How can I add a button {from form controls} to the active sheet if I
want it to be in a specific position? Ideally, I want the button to be
aligned in one row and contained between three columns - my problem is
that I won't know before hand which row I want to restrict by.

The sheet I'm dealing with will have a variable amount of data every
time it is generated by my code, and I always want the button to be at
the end of the data.

Any ideas?
-bgetson