Android Question FileDialog restricted access


Licensed User
Hi All,
is there a simple and easy way to restrict the access to a single folder using File Dialog ?

Just to explain better what is my problem, I don't want the user to move up in the directories tree using the ".." symbol.

The File Dialog doesn't fire any event in such case, so I can't filter it in my software.
Is my sentence (about events) right or am I missing some important detail ?

I'm using updated versions of Dialogs library and B4A.
Thank you in advance...