Nanfor query

Hi ppls,
I can't get NG to run on my XP notebook, so I'm asking here instead.
I seem to recall that in the Nanfor file functions, there is a 
seek/search function. I thought it was FT_FSeek( string ), but it's not.
Can anybody elucidate?
Basically, I want to open a text file and search it for a specific string.
Cheers
Chaz