*laughs* Judging by the answers so far, I would bet many are in the IT field.. just not actual programmers.
1. In two weeks you will not learn a new language, but good chance you will get a grasp.
VB6? Tons of shops still use this langauge, MS is thinking about about removing support if not already in progress to do so. There is a reason, the newer versions of .Net are not doing as well as previous versions because of Dev Time and Dev Costs. You can find VB coders for 10k cheaper then a C#.. (Dollars vary for different areas). The one thing VB does bring is the time to market which .Net cannot touch. I think this will be much like the Y2k issue except without an fixed point to kill the language it will never go away.
I do agree, VB6 teaches some god aweful habits in new programmers that usually require a 2x4 to remove. You are going to learn a very bad version of OOP (Before someone jumps that VB6 does not do OOP, it does. All a language needs to be labeled as OOP is it has Objects that can manage behavior with methods and attributes). In my professional opinion, I would not learn bad habits until I knew the right way to do something nor would I allow anyone under me to do so either.
.Net Package: If you will be in the Enterprise arena, this would be a good thing to know but you will find as the employer gets smaller.. this package is not used. This will change though, it will just take a few more years. For long term, this is your best bet.
Java.. Just not a professional langauge yet. They really need to take a SmallTalk approach to this and then it might get some value to it. I find it funny when the best IDE for a language is notepad but maybe this is me, been using Java since like .42 beta.
If you learn something from reading the above, is each langauge has a time and place to be used. The key to being a good developer, is to know when that is. You are a perfect example, you have very little time but need a lot done. So you need to pick a language that fits that and then after these two weeks are over, select a langauge to learn that will help better you as a programmer. If you were really motivated to learn a real language, you would not have waited until the last 2 weeks to do so.
Check out this website:
www.planetsourcecode.com
This will give you a good look at most of the langauges several of the other posts have brought up.