How to give support for Samsung S-Pen?

In my Galaxy Note, the s-pen is not working. One of Unity´s 3.5 changes is:

“Added support for Galaxy Note Stylus Pen (through KeyCode.LeftControl and KeyCode.Delete).”

I´m running 3.5.6f4. I can´t get it to work, i´ve tried both Input.touches and Input.GetMouseButtonDown to no avail. Only UnityGUI seems to be responding to the stylus.

I suppose the KeyCodes mentioned in the changelog are the keys that are on the stylus, not the actual stylus. Has anyone managed to get this working?

I think Samsung got this to work, see http://developer.samsung.com/s-pen-sdk/unity-extension.