Welcome to www.cryptovb.com. This Web site contains resources for Visual Basic programmers who want to include strong cryptography in their programming. It is currently maintained by SPG (which is a broad community)
There are only two books on Cryptography for Visual Basic; see the books link at left.
Microsoft has released a COM wrapper for Visual Basic called CAPICOM, which provides access to much of (but not all of) Microsoft's CryptoAPI. You can download and read about it. It's really good for certificates, but if you just want to juggle your own symmetric and asymmetric keys, you may want to use the WCCO open source code instead.