Hi Pablo,
When you create your own functions,
they are referred to User Defined Functions (UDF).

Some examples UDF are in in
http://www.mvps.org/dmcritchie/excel/formula.htm
http://www.mvps.org/dmcritchie/excel/proper.htm
and instructions to install in your personal.xls
http://www.mvps.org/dmcritchie/excel/getstarted.htm
---
HTH,
David McRitchie, Microsoft MVP - Excel [site changed Nov. 2001]
My Excel Pages: http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page: http://www.mvps.org/dmcritchie/excel/search.htm

"Pablo Ramirez via OfficeKB.com" wrote in message ...
Hi. I want to know how can I do to add a function for use like Max() or Min()