For anyone else that runs across this.... I have a series of tutorials on YouTube that cover getting started with Fanuc Focas in C#. It shows where to put the DLLs, how to use the provided fwlib32.cs file, and a bunch more information. https://youtu.be/sAjAmL73u54?si=f4dmqakA7yqVK9Cl is the Fanuc Focas playlist.