where can I find a better documentation.

What is tuilproxi?

You can download the PDF developers guide here:
There is also a sample application included in the distribution.
The TUILProxy is a class that exposes published Enabled/ReadOnly/Visible properties to hook to the security system manager and these property setters trigger events. From these event handlers, other component properties can be set that should be mapped on these property functionalities but that happen to have other property names on the component to be controlled.

There are a lot of properties that are not documented. How Do I know how to use them?

There is a demo application included showing a use-case for the Security System.