Seems to me a that a year or so ago someone tried to use Xt Widgets
with Xforms -- don't know that they had any success, though. I rather
doubt it.
I think you'd definitely have to go through some extraordinary
contortions to make it work. XForms and Xt would battle for control
of XEvents -- you'd have to write your own event loop rather than use
either XForms's or Xt's and dispatch events as appropriate.
I strongly disrecommend mixing the two. What's in your Widget that
can't be done in XForms (or, conversely, what's in XForms that can't
be done in your Widget set)?
spl