According to N-trig, Microsoft has to do the job:
"Does N-trig offer customization of the side pen buttons so they can be mapped to various commands or keys, different for each application, like Wacom does?
For example, in Photoshop, the lower side button set to pan, top side button to right click, and another combination for Illustrator, Painter, 3dsmax etc?
If not yet, when is this expected to be implemented, and is there any workaround through other utilities like autohotkey etc?
Actually it’s not N-trig’s call.
We will provide pen API to ODM/OEM like Dell, Acre or SONY, it’s up to them if developing such application.
Regards,
N-trig E-support.."