CARB Question? Net vs Reg

What is the difference between Carbs and Net Carbs?  Which do we count?  If we count Net Carb how do you determine the Net Carbs in an item?  I have one other question about protein, how do you figure a protein count when you eat out if there is no nutrional count?  Such as yesterday I ate about 8 popcorn shrimp (breading removed)  but not sure how to count the protein since we were eating out.  Thanks for all of you that answer!

Total carbs
- sugar alcohols (we don't absorb them)
- fiber (not absorbed)
____________
net impact carbs


Or I just count sugars since that's the only thing that can fatten me up again

Can't answer the protein, as I never count food protein at all.

since Michelle answered carbs I'll just tell you that I count approximately 7 grams of protein for each ounce I consume.  Sometimes ya just gotta guess, otherwise get on sparkpeople.com or fitday or whatever you use and count it up when ya get home

Thank you so much that anwered my questions.  Thanks again. 

I didn't cout any of them, except for being mindful fo the simple carbs (flours and sugar).  Veggies are partially malabsorbed anyway.