scripting tn5250

I've been looking through the archive about scripting and Brian's recent
post (http://archive.midrange.com/linux5250/index.htm)  seems to be the
closest to what I want.

What I want to do is to be able to script tn5250, cross platform, to tie
some programs together.  So if program X says something, an intermediate
program (say a perl script) listens and then starts up a tn5250 session
(or modifies an existing one) and issues a couple of commands to bring
up the right information.

Can someone with more knowledge than I comment on how close to possible
this currently is?  Or a vague outline of what it would take to have
this happen?  I'd be interesting in helping make it happen, if I can.

Thank you

--
Steven Kurylo