Child Dockable WIndows

I have three toolwindows in my app that are supposed to be dockable.
In the OnCreate event I set them as child of the main window by:


Now, on run, if I drag them once they lose their state of child and start to
be indipendant windows. This doesn't happen if I set their dragstyle on

This is someway annoying. If anyone can help.....


Gianlorenzo Thione