Cooking with wine?

Katie M asked:

Hello, I'm going to be cooking with some left over wine and I read that it takes 2.5 hours to burn out the alcohol until there is 5% left, but obviously, it doesn't take 2.5 hours to make a sauce. So my question is, can the wine cook on the stove by itself? Or will it just all evaporate? Does it HAVE to be cooked with something?