[lazarus] TNoteBook probems Fixed

[Michael Van Canneyt]

On Thu, 30 Sep 1999, Gertjan Schouten wrote:

> > * A control should never be part of its own controls collection. In my
> > debugmessages I see constructions like:
> > [TWinControl.Remove] TBUTTON --> Remove: TBUTTON ()
> > [TWinControl.Insert] TPAGE --> Insert: TBUTTON ()
> > and it looks like the parent of TBUTTON was TBUTTON itself. 
> > Something similar: A form has no parent and while looping through the
> > controls collection, you'll find the form as Controls[0]
> 
> Parent in TForm has only meaning if the form is an MDIChild.
> Setting the FormStyle of a Form to fsMDICHILD sets the Parent 
> property to Application.MainForm, otherwise Parent is always NIL

Actually, there is a trick that allows you to set parent to an arbitrary form.
it's documented in Charlie Calvert's book on Delphi.

Michael.