Microwaving wine to remove alcohol?
Cooking is not as effective at removing alcohol as many people think; the alcohol and water evaporate or boil together. At a simmer, it might only take 10-15 minutes to get rid of half of the alcohol, but getting rid of 90% of it takes more like two hours. See this previous question on cooking away alcohol for more detail.

In any case, a microwave can certainly simmer or boil liquids, and the alcohol/water evaporation doesn't care about what equipment you used to cook it, so you certainly could do use a microwave to reduce the amount of alcohol in wine.

However, it doesn't give you nearly as much control as a stove; even if you use a reduced power, it'll tend to boil on and off as it cycles the power. And microwaving for extended time periods is a pretty awkward method.

So in general, I'd suggest doing this kind of thing with conventional cooking methods, especially if it's as part of a dish. You can use the cooking time of a stew to help reduce the alcohol, for example. And even if you want to remove more alcohol than the cooking time of your dish permits, a pot on the stove gives you much better control.