Help needed in using TList.

I have used a Tlist component in my project.Now I faced with a new problem
I would like to edit a particular field in a record and i am unaware of
any procedure .I very much pleased if somebody can help me out.
Thanking You
Purnaram.K
E-Mail :sl...@cc.usu.edu.
(If Anyone can send me mail that would be great)