Excel 2000 and text file call

What is the function within Excel to call a textfile in the same folder, and search within textfile for a keyword?

Websites considered:
http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/130/threadid/273598/scope/posts/Default.aspx

http://forums.techguy.org/business-applications/815345-solved-sql-request-excel-file.html