Dealing with interrupts in LW

Is there a mechanism for dealing with interrupts in LW?  Ideally I'd
like to be able to set up handlers for various Unix signals, but since
I want it to work on windows too that is probably over-ambitious and
I'll settle for being able to handle keyboard interrupts (SIGINT to
Unix I think) and doing some cleanup action before dying.

This is probably somewhere obvious in the manual...

--tim