VR Case Gamepad

Hi everybody.

I am using this controller.
How can I use it from Unity?

I am using C# and I would like, if possible, to avoid using libraries.

So, how am I supposed to check, in C#, inputs from the controller?

 

I like using this to check my inputs from random controllers:
https://www.assetstore.unity3d.com/en/#!/content/43621

 

I thought it would have been more complex, so thank you!