Create shipping labels via Fedex API

We have a custom built in house software built in VB6 using MySQL database. We are looking for someone who has experience working with Fedex API. You can use whichever programming language, but it must blend with our VB6 application. Meaning, the event will be triggered from the VB6 software and your application will be well hidden and just provide the shipping label for our user. A shipping label is a printout of information provided by Fedex that will act like a postage stamp. I think it has a barcode on it. We will print it and tape it to a box where then we can mail it.