Dealing with images and databases is basically done with byte arrays.

Here's a one starting point with VB.NET code samples from my blog:
Convert image to byte array and vice versa
Save binary data to SQL Server with VB.NET

You may also try Daniweb's site search. I've answered the same or at least very similar question few times. A pretty good search phrase is "image SQL Server VB.NET" (without quotes).