accessing mdb. file in a protected shared folder

Hi all, I'm developing an application that should access an mdb file in a protected shared folder in a local net. I have tested it in a non protected shared folder and it works, but I have no idea how to make it work in a protected one. I'm using the OleDBConnection Class. I wondered.. has the ConnectionString a parameter capable of doing this (user .. password)? How can I make the application open the folder, and close the session once the data had been captured? (to prevent non authorized access). Thank you so much.