@grant-rogers, oh right, I’m using C# WPF. Just created a new .NET Framework project. Copied the “lib” directory with the DLLs to the project. Added tobii_interaction_lib_cs.dll and tobii_interaction_lib_wpf.dll to References. Thought it would suffice, but apparently missing something.
Thank you for your advice, I’ll try to strip down the sample app too. Just want a clear understanding, what is needed for correct usage.