🚀 go-pugleaf

Hi out there....well it's time for another question that will 
probably be ridiculously elementary for most of you. I am writing
a program that will basically run a 'do until cntrl c is pushed'
kind of loop. My question - How do you test for cntrl c ?????
I am using the Megamax C compiler and I found one function called
Ccein (or something like that ) that says it will echo keyboard input
without displaying it except cntrl q cntrl s and cntrl c which will 
be trapped and acted upon.
Sorry if I'm a little ( or a lot ) slow, but being fairly new to the
world of C, this is pretty cryptic to me. Is this the correct way to
test for cntrl c ? If so, how do I use this function (examples please).
If not, what's a pretty standard way of doing this ??????
Your responses will be greatly appreciated,
keith hedger