Best way to retrieve pen pressure value from a Wacom Intuos M for a 64bit SFML drawing application on Win7/64bit?

Question

iam looking for a lightweight solution to retrieve pen pressure from a wacom tablet. My system is win7 64bit and the application is an SFML c++ 64bit program. I found that wintab seems to be the industry standard but its only 32bit. Also i found MS Ink, but iam not sure if this makes sense since i wrote my own brush/pen drawing program already. I would just need the realtime pen pressure data. XY i get already from mouse coordinates in SFML.