John is certainly right, and Microsoft has a ton of online material, but basicly this should get you off to a good start:
Visual Studio 2010 - Visual Basic[
^]
and when things becomes unclear - use the "official" vb specification:
Visual Basic Language Specification 10.0[
^]
It's easy to forget the product documentation, as in "real men don't read the ..."
Good luck.
Regards
Espen Harlinn