Hi @joelvis, as Delphi does not support .NET Bindings, it seems unlikely you will be able to integrate the Tobii Core SDK with a Delphi application unfortunately.
This would also apply to the Tobii Pro SDK.
That being said, a user from last year did managed to hack something together using Delphi and the now deprecated EyeX SDK. Feel free to look at this older thread @ https://developer.tobii.com/community/forums/topic/using-dll-in-delphi-control-the-mouse/
Hopefully some useful information contained within! Let us know if we can be of any further assistance.