example treeview of Thunderbird

[Colossus <colossus 3000 it>]

Hi,

is there an example on the internet on how to create a treview like 
the one of thunderbird (I mean the left side that contains the local 
folder) ?? And what about the left side of the window that appears
when you click on Edit/Preferences (always of Thunderbird) ??

Thank you,
--
Colossus

Cpsed, a Linux OpenGL 3D scene editor
http://cpsed.sourceforge.net/