Code for Payment processing using First Data Global Gateway (Link Point)

I am looking for someone to write code to perform payment processing using First Data Global Gateway (aka LinkPoint). The code must be written in VB.Net and will be used on an ASP.Net website. The code should use their Web Services based API. I need functions to charge a credit card, check, and perform refunds. Sensible use of OOP principles appreciated. You can read all the details on their Code Wrappers and Manuals @ [login to view URL] (See FD Global Gateway Web Service API v1.8 for details). Signing up for an a test/staging account is free and should making testing relatively easy.