The NETSETUP_JOIN_STATUS enumeration specifies details about the domain join status of a machine.

 typedef  enum _NETSETUP_JOIN_STATUS
 {
   NetSetupUnknownStatus = 0,
   NetSetupUnjoined,
   NetSetupWorkgroupName,
   NetSetupDomainName
 } NETSETUP_JOIN_STATUS,
  *PNETSETUP_JOIN_STATUS;

NetSetupUnknownStatus: Domain join status of the machine is unknown.

NetSetupUnjoined: Machine is not joined to a domain or to a workgroup.

NetSetupWorkgroupName: Machine is joined to a workgroup.

NetSetupDomainName: Machine is joined to a domain.