No you cannot, not in VBA, the UDF has to be in the standard code module.

You can call a class from within the UDF, but not directly as the UDF.

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HTH

Bob

"Leo" wrote in message
...
Dear Experts,
I recently became interested in style of using Class Modules.
I need to know if we can use Class Modules to creat User Defined
Functions?(functions that is useable in Excel sheet like a normal
worksheet
function)
if yes, please explain how, and show a simple sample.
thanks in advance.
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Thans & Best regards
Leo, InfoSeeker