Hi @tw2018, of course, happy to help 🙂
To get started in developing your own applications, please check out the Tobii Core SDK which you can get via Nuget on Visual Studio by following the introductory documentation @ https://tobii.github.io/CoreSDK/articles/intro.html
Thereafter, please download our sample applications which include a variety of key eye-tracking interaction concepts along with the various data streams available to you @ https://github.com/Tobii/CoreSDK
So kindly go through these links I have sent over and let us know if we can be of any further assistance to you.