You need to add the function to the PERSONAL.XLS file to be able to use it
in all files.
Learn something about VBA from David McRitchie's site on "getting started"
with VBA

http://www.mvps.org/dmcritchie/excel/getstarted.htm
best wishes
--
Bernard V Liengme
www.stfx.ca/people/bliengme
remove caps from email


"Alejandro Garcia" wrote in message
. ..
I need create a funtcion and use it in all book, in all sheet. I have the
function but I don't know how use it like, =MyFunction() in something
books.

Thanks.

Sorry, my English isn't good.