[Tkinter] listbox selection

[DPaul]

I ran this second version and it goes a long way to what I want to achieve.
But physically moving the selected items is not necessary.
What you cannot know is what I, (eventually "the users") am doing.
From earlier posts in the bar forum, you may know that I am trying to speed up
data entry of historical genealogy documents. Imagine 100.000 19th century prayer cards,
OCR-scanned, in python and shown line by line in the listbox. Now I want to select items
in a particular order (Name, place birth, date birth, etc..) I do not want to
shuffle the lines around, because then the text makes no sense any more,
and users are lost. What I will do is keep your idea of a shadow list,
but remove the re-ordering.
If you have any other ideas that could help me, keep them coming.
Gribouillis has already sent me some magic flux that was very helpful.
thx,
Paul