Visual C++

ASP .Net

W3Schools
ASP Alliance
GotDotNet (this is a really good site)

If you need more resources try searching Google with more details on what you are looking for...or ask your TA

C#

C-Sharp Corner
C Sharp Help
Csharp-Station

VB .Net

I don't know of any great VB .Net sites but most of the ASP .Net examples seem to be given in VB, and the MSDN reference is a good resource. Let me know if you can't find something VB related--I'll help with the search

Generally useful reference

MSDN APIs