We recently bought Visual Studio Professional. This package comes with VB, VC++, and VFP. I am very comfortable writing my applications in VFP, but should I be writing some of my code in VB or VC++? I know the basics of VB and VC++, and I would not mind learning them fully.

I will probably be writting internet applications in the near future for the apps I write today. I just heard about Windows (DNA). Should I be investing this? Are there any books or classes that would help me?