Well, I've put a notebook GUI in my game. I was thinking when something important needs to be written in the notebook I will enable a GUI label on it, which at the start of the game will be disabled. But how can I use it, to make an interrogation like in DiscNoir? I've made a code that when you click on the notebook item the notebook gui appears.
So you want to be able to ask people about the notes in your notebook during conversations?
Make a Dialog topic containing all notes as dialog options, disable them all and then turn them on one after another, at the same time the respective GUI label is turned on. (Dialog.SetOptionState)
If you want to drag notes to people to ask them about them, use a second inventory window to display the notes.
I'd refine that suggestion, but I haven't played DwN yet and I'm not sure what you want to achieve exactly.