configure topaz signature pad using c# and dll files

Question

How to detect if Topaz device is connected?

 

My Topaz is: T-L245-HSB-R (USB) I am using: dll

 

As it says on their officail DEMO:https://www.topazsystems.com/dotnet.html

 

https://www.topazsystems.com/software/download/sigplusnet.pdf