how do I get items in object inspector tree view

[Thaddy]

Look at the sourcecode for any of the provided components that show sub components in the object inspector. There are many of those.
Basically: write a component editor for it.

[minesadorada]

Look at the sourcecode for any of the provided components that show sub components in the object inspector. There are many of those.
Basically: write a component editor for it.

We have traveled this route. It's about the TreeView not the OI grid.

[Thaddy]

Look at the sourcecode for any of the provided components that show sub components in the object inspector. There are many of those.
Basically: write a component editor for it.

We have traveled this route. It's about the TreeView not the OI grid.

Well, why doesn't that work then? A custom property editor CAN use a treeview.

[Michael Collier]

Maybe some confusion here.. The tree view that I'm referring to is the one in the top of the object inspector. I'm not looking to use a TTreeview in my own property editor.

[Ernest]

The tree view that I'm referring to is the one in the top of the object inspector.

Unfortunately, that thread ended almost 5 years ago without a constructive solution. Is there any good solution for the described need?

In my case:
I'm trying to create a custom component Hugo derived from TPanel. Let's say, Hugo has 5 buttons so i can switch between 5 pages. So i created a variable FNotes (derived from TNotebook) which is my subcomponent. Because i registered Hugo in the palette, so i can place him on the main form and he is visible in the Object Inspector (OI) as a graphic icon with its properties in the grid.

Problem:
The thing is that i can only access the pages in the code (e.g. via Hugo.FNotes.Page...) to place a button or other visual element on it. I want to place different elements on each page individually and it will be helpful for a design time to see every placed object on it.

Question:
How is it possible to show the subcomponents of a custom component (=own creation!) in the tree view in the Object Inspector? Like it happens standard if you place elements on themself (cf. attached pic below for a better understanding).

Disclaimer
I described above just a reduced principle example. I know, the easiest solution in that case is just to put TNotebook on the main form and place visual component on it.