Get speed data via USB

[Pahegi]

Im working on a program for the Concept2 and want to get an live output for Unity3D. What can I do, to achieve this? (Never programmed with C or C++)
Always if i tried to compile a demo code, it showed me an error with the header files.
Thank you for your help,

Pahegi

[kdahlhaus]

I suspect you need a DLL to talk to the engine? If I were doing it, I would create a DLL from easy erg (https://github.com/kdahlhaus/easy-erg) using the CMAKE info Nils contributed.