Hi @snowymo and thanks for your query. There are a couple of ways you can use the Tobii 4C for Interaction. Firstly, have you already tried use the Eye Control Software that now comes as standard with Windows 10 (Fall Creators Update)?
This article explains in greater detail how to get up and running with this feature @ https://help.tobii.com/hc/en-us/articles/115002768173-Get-started-with-Windows-Eye-Control
An alternate avenue is of course to develop your own application using our SDKs. As you accustomed to C++ already, then we can recommend the new Interaction Library API @ https://developer.tobii.com/consumer-eye-trackers-interaction-library/
Unfortunately, we do not right now have support for tracking use an API on a web browser. However, we have the older Core SDK which has some samples with WPF forms, which should enable you to get up and running faster.
You can download the Core SDK @ https://developer.tobii.com/consumer-eye-trackers/core-sdk/
with samples @ https://github.com/Tobii/CoreSDK
Please have a look over the information I have sent over and do let us know if we can be of any further assistance.