How to get the incoming number using RingCentral.Net and vb.Net in WinForms application?

We have an existing vb.Net WinForms application that accepts a phone # as a command line parameter. We have attempted to use RC Desktop Phone app to launch the external app but it does not work well in the clients terminal server environment. We are trying to convert the application to use the RC API to get the incoming number.

It looks like I need a presence subscription. I found this example https://gist.github.com/grokify/2c32b06e885b4637b8153a4b938fccb6 but it is written for the old C# SDK for .Net. I'm looking for vb.Net example code for getting the incoming number using the new RingCentral.Net class library.

Any help is much appreciated.