Hi Chris!
I think I know how to implement this feature of Win32 serial comm, but before I attempted I wanted to broadcast my intent to do so. Is anyone else working on this, or in the serial.c area that would like to discuss it?
No one that I know of is working in this area. Periodically someone might work on serial comm stuff, particularly Uwe Bonnes, but in general this area languishes until someone motivated comes along.
So please, work away :) Out of curiosity, which device are you playing with?
Cheers, --Juan