[Lazarus] OnUndock event question

Vojtěch Čihák vojtech.cihak at atlas.cz
Sun Mar 1 17:51:04 CET 2015

when is triggered OnUndock event of the form?
I have Panel (UseDockManager=True, DockSite=True) and I dock there a form (it is a toolwin) with method Dock(Panel, rect);
Then I undock it with Dock(nil, rect); 
It seems that OnUndock is never triggered, I also tried OnUndock of the panel but it does not work either.
How should I do it right?

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