Hi @blair, I believe this is still a problem with the DLL’s not having the right bitness. Did you by chance know about the tutorial we have written for getting started available @
http://developer.tobii.com/walkthrough-setting-cc-project-eyex-c-api/
Although the arhitecture is different, I still think following this guide would be good way to ensure the proper procedure is followed. Please get back to us if you still have problems.