Try this:

http://www.vertex42.com/ExcelArticle...functions.html

:) !
Doc ky o muc:
"How to Create Excel User Defined Functions"

Chuc may man!


--
Rock


------------------------------------------------------------------------
Rock's Profile: http://www.excelforum.com/member.php...o&userid=29723
View this thread: http://www.excelforum.com/showthread...hreadid=510475