Read this:

http://www.jkp-ads.com/articles/RegisterUDF00.asp

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Kind regards,

Niek Otten
Microsoft MVP - Excel

"Faraz Ahmed Qureshi" wrote in
message ...
Any guidance as to how to have a UDF in an addin be declared/registered
etc.
so as to be used like all other usual/normal functions? like be
autocompleted
upon partial entry, arguments be displayed in the supertip and be capable
to
be used in the Conditional Formatting and other features?

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Thanx in advance & Best Regards,

Faraz!