Hi @frezval, thanks for your query. Can you kindly confirm which SDK you operating as the syntax of your code implies using the older EyeX SDK which has since been deprecated and replaced with the Tobii Core SDK. For getting started with implementing eye tracking in Windows Forms using the Core SDK, we would recommend running the WPF samples applications we include online @ https://github.com/Tobii/CoreSDK -> Interaction_Wpf_101
If you are just getting started with the application, then we would recommend using Core SDK unless there is a reason you need to keep with the older EyeX SDK?
That being the case, it would be beneficial if you could kindly share the project for this application that we could try and run it directly if possible. Hopefully in either case, we can get you up and running soon!