Here is the tutorial in which you can learn how you can make NordVPN checker in VB.net. This video helped me a lot I was unable to understand how to add a custom header in httpRequest then this video showed up and it helped me to understand how to do that. Because NordVPN httpRequest required an Authorization token in the header. He used a NordVPN OB config to get the required data. If you want to make your own NordVPN checker then you have to watch previous videos of this series to understand each and everything.