What kind of an add-in (.xla, .xll, COM dll)?

Regards,
Aaron Queenan.

"S. Daum" wrote in message
...
I have developed an add-in using Excel 2002. Some of our customers are
using
older versions of Excel. Could anyone point me to references that might
explain different deployment options? For example, should I ship both an
Excel/97 and an Excel/2002 version of my add-in? By only using Excel/2002
can I make both versions? Where is the best place to install an Excel
add-in? Any guidance appreciated.

Regards,
Steve