Sorted Outline (TreeView)

Delphi 1.02:

TListbox and TComboBox have a property 'Sorted', unfortunately I
didn't find anything similar for TOutline.

What I would like to have is a 'sorted' Outline, in such a way that if
I add sub-elements (without having to sort them first) to a certain
element of the Outline, they are automatically sorted alphabetically.

Can this be done ?

Thanks for any hints !

Thomas Marti