verfy security options, log, group member

hi, i need your help, i'm from venezuela, recently im try to develop a proyect of vulnerability Windows Scanner, in this aplication i have find  shared directories, permissions, is like a command srvmgr.exe, also all propities about account policies, audit policies a user rights, my question is, how do I in c# all these thing? witch class or library, thank you, sorry for my level of english.