I've done a search through the forums, but I haven't managed to find
the answer I'm looking for.

I have a relatively simple Excel file that I created using VSTO.  In
the startup event of one of the sheets, I add a button to the toolbar,
and when I click that button, it opens up a form.  When I fill in the
form and click the run button, it grabs data from a stored procedure
and dumps it into Excel, formatting it correctly.

When I run it in VS.NET, it works fine.  When I go to the bin folder
and open the Excel file there, the button appears, and clicking on it
works like a charm.

But... if I take the Excel file and the dll and copy them to another
place on the same workstation (My Documents), then when I open up the
Excel file, no button appears.  No error, either.  Nothing.  Clearly,
something is missing, but I'm not sure what it is.  I can't imagine
that I need to use an installer project, do I?  Again, it works fine
without Visual Studio when it's sitting in its original bin folder,
but if I put it anywhere else on the same machine, it doesn't.

Thanks,
Lisa