[This is preliminary documentation and subject to change.]
The DirectoryList control is notified through this event when the user wants to select the parent of the present directory.
None.
The subscribers are disabled if the current directory has no parent (it is a volume), otherwise they are enabled.
Changes the selection to the parent of the current directory.
A PushButton control on the same modal dialog as the DirectoryList subscribes to this event to trigger stepping up in the path.