🚀 go-pugleaf

I'd like to know how to do cross-referencing in TeX.  Preferably
automatically.  For instance, I'd like to be able to say something like:

\beginsection{This is a test}
\label{foo}
\endsection
....
This is talked about in section{foo}

I'd like to be able to program TeX to do it.  (No, I hate LaTeX, and haven't
bothered replacing my manual since it got lost)  This would be useful for
things like computer manuals, or wargames rules, for instance.

I have no idea how to do it, other than by writing to a file, and that's kinda
messy:

1.1
title1
1.2
title2

And I can't do forward referencing in that case.

Ideas, suggestions?  I'd particularly like to know how LaTeX does it (no, I 
don't find that code readable...)

Na Choon Piaw
piaw@cory.berkeley.edu