During my investigation on this question, I came across documentation on the FileTableRootPath function. "It returns the root-level UNC path for a specific FileTable or for the current database".

http://technet.microsoft.com/en-us/library/gg509104.aspx

I don't know if this is what you were specifically referring to. I am new to FileTables and have not used this functionality yet.

Regards,

Brian

EDIT: forgot to add the URL reference.