Selection controls were implemented in 2D at a time in which we did not yet have objects like checkboxes and buttons. At that time, they made sense to allow the users to implement such objects themselves.
For a couple of years, these objects are there so the original need was no longer there.
In that time, we learned that models with selection controls quickly became a pain in the ass to be understood and/or operated by anyone short of the author of the model - and in not that few cases even by the author.
As a result, we made the decision some time ago neither to implement a 3D counterpart to the 2D selection control nor to link the 3D selection to a common selection control mechanism.
What still would be interesting to me is what you want to accomplish with a selection control?
It might well be that there a a couple of better ways to accomplish the same goal.
Ok , I understand.
I just wanted to test the onSelected feature and I see that the beavior is not the same in 2D and 3D. And I noticed that several feature witch exist in 2D does not exist in 3D.
The question I'm asking myself is how build a full 3D model when I can't use all 2D feature.
User ribbon tabs and user context menus are available from the 3D properties dialog of the frame (you can find them in the "Tools" menu, as well as e.g. the shift calendar selection).
The align commands will be available in version 14.1.