not PWO. after a workout is when your body actually needs an insulin spike to replenish muscle glycogen lost during exercise. PWO is the time when your body is most sensitive to the good effects of Insulin (i.e. whereby insulin shuttles carbs into your muscles, rather than adipose tissue). of course, if you overdo the post workout carbs the residual carbs that can't fit in your muscle stores may be stored as body fat.
in this regard, dextrose would be a good carb for PWO consumption b/c it would get you that immediate blood sugar spike that your muscles crave at that point in time. you might end up feeling somewhat bloated, however.
i've found that i don't get much of a bloat with oats, but if i eat too many oats (or carbs for that matter) i do feel bloated and have a hard time getting hungry again an hr later for a full meal. so i'd say, keep your pre and PWO meals somewhat small but efficient enough to kick start the anabolic processes and reserve your hunger for your post post meal.
also, i'd stay away from mixing milk and whey. you'll feel very bloated and the casein protein in milk would only slow the absorption of your whey, which is not totally ideal PWO.