[Lazarus] TShellTreeView and TTreeView

[Felipe Monteiro de Carvalho]

Hello,

I am trying to implement TShellTreeView. It is a treeview which shows
the directory structure in the prefered way of the operating system.
In Windows that would start with My Computer, etc...

One problem now is with the design. Should it read all existing
directories (which will cause a delay) or only those visible, or one
or two levels at once... what do you think? Reading everything may be
problematic with removable media.

Another problem is using TTreeView. I searched by I can't find how I
would implement this behavior, for example, having the root and 1
level visible and then when the user clicks the + symbol the subitems
for this item are loaded. Should I use the OnExpanding event? In the
event handler I would create the subitems? A tutorial would be
great...

thanks,
-- 
Felipe Monteiro de Carvalho