[Meaning] The fully qualified DNS name that uniquely identifies the computer. If the local computer is a node in a cluster, lpBuffer receives the fully qualified DNS name of the local computer, not the name of the cluster virtual server. The fully qualified DNS name is a combination of the DNS host name and the DNS domain name, using the form HostName.DomainName. [Value] 
ComputerNamePhysicalDnsFullyQualified