Hi @tw2018 and thanks for your query. I am afraid that the Tobii Core SDK does not come with VB.Net samples available unfortunately. That being said, a number of other users have successfully converted the required C# code to by following the instructions as outlined in a similar thread on the forum which you can view @ https://developer.tobii.com/community/forums/topic/vb-net/
Indeed one of the users posted his final solution, so you can get the code to try out for yourself. In addition, you may find this documentation version @ https://tobii.github.io/CoreSDK/articles/getting_started.html more helpful in explaining how to setup interactors.
In case you did not already see the more simple sample applications, you can check them out @ https://github.com/Tobii/CoreSDK which perhaps can help you get started with the C# bindings as necessary.
Apologies we don’t have a sample ready for you, but hopefully the above links and information will provide the help you need. Please don’t hesitate to get in touch should you require any further assistance.