Try searching CodeProject articles for "LED Display VB.NET"
Seven-segment LED Control for .NET[
^]
If that is not enough try searching Google with exactly the same search criteria
https://www.google.co.uk/?gfe_rd=cr&ei=gW9rU4reGarY8gfqn4HYBw#q=led+display+vb.net[
^]
If you have problems then by all means come back with a specific question, posting the code that you are having the problem with
Based on OP Comments the following links may be more helpful ...
Arduino with Visual Basic[
^]
http://serial-port-communication-in-vbnet/[
^]
Bizarrely a post in the Lounge has just led me (circuitously) to this post
easy arduino projects[
^] - one of which is wiring up an LED display. It's not VB.NET but hopefully will give some more information to get started