How to configure file search routines?

How do I configure a new installation of WinXP so that its file explorer will search for byte/char ASCII content in files with *.PAS, or other extensions of my choosing?

I have configured it in the past, but now cannot remember or find out how.

TIA, JohnH

See: http://www.google.com/search?hl=en&q=file+diff

JS

"John Herbster" <no-swen@no-swen.com> wrote in message
news:utqvS5ftIHA.1316@TK2MSFTNGP06.phx.gbl...
How do I configure a new installation of WinXP so that its file explorer
will search for byte/char ASCII content in files with *.PAS, or other
extensions of my choosing?

I have configured it in the past, but now cannot remember or find out how.

TIA, JohnH