[plt-scheme] Hierarchy to save a file??

Have you even read 
http://download.plt-scheme.org/doc/372/html/framework/  (it's also 
available in HelpDesk, assuming you are using v372 or below)?

Chongkai

AntoinePaulSoulé wrote:
> Hi everybody!
> I'm writting a little program to draw diagram and I would like to have
> the hierarchy (arborescence? in french...) in the frame "do you want
> to save your file?"... And also "open a file". Do you know how to do
> this please?
> I have found function which deals with directory, like (directory-list
> (current-directory)) for example, but I would like to have a graphical
> interface (with the possibility of going from a directory to another,
> cliking on a file ... like a real program!)
> Thank you for helping me! (and sorry for the grammar mistakes, I'm
> french)
> Antoine
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