There are many types of files that can help you learn: source code packages, rpg engines, helper libraries,
directx wrappers, etc etc. They've been split into relevant categories to make finding what you want easy.
RPG / Tile Engine Source
Source code packages for both 'complete' RPG engines (usually including things such as NPC support, character creation, etc.), or plain tile engines which are a great place to get started on an RPG. Many of these include map editors to go along with them. Something to remember, though: it's always best to look at these only as an example, and to write your own engine so that it can cater to your game's needs exactly.
Full VB Games w/ Source
Full games written in VB that include the source code. It's great to look at something finished and see what you can accomplish in VB!
'Helper' Libraries and Utilities
These libraries and utilities can be of great help when you just can't quite take the time to write some complicated algorithm yourself: after all, why re-invent the wheel?
Sample VB projects detailing the implementation of specific effects. For example, alpha blending, scrolling credits, or NPC conversations.
Miscellaneous files that don't quite fit into any of the existing categories. If enough files in this category seem to fit together, a seperate category will be created for them.