Graham,

Here is an article that shows how. It is not .Net based, but you should
still be able to apply

HOWTO: Create a Visual Basic Automation Add-in for Excel Worksheet Functions
http://support.microsoft.com/default.aspx?kbid=285337

--

HTH

Bob Phillips
... looking out across Poole Harbour to the Purbecks
(remove nothere from the email address if mailing direct)

"Graham" wrote in message
...
I am new to COM Add-Ins and have implemented the
Microsoft example:
HOW TO: Build an Office COM Add-in by Using Visual
Basic .NET
Reg: http://support.microsoft.com/default.aspx?
kbid=302896

This worked fine. However, it only shows how to include a
user defined button. I wish to add additional member
functions to the connect class, or a new class, that can
be called from macros within Excel.

I am using vb.Net 2002 and Excel XP.

Any help much appreciated.


Regards: