dont quote me on this but i think protools is an entirely separate platform. you record audio through your soundcard, you chop it up, quantize it, clean it up in something like wavelab or soundforge or reason or whatever you use, then ship it into protools.
i also thought that protools was just a hard drive and a farm of DSP processors that crunch crazily good, better than hardware quality effects and mastering/dithering tools. you can record audio from hardware synths and what not using the input on your regular soundcard. once its recorded, just bounce it into protools.