LDAP+C#
参照設定:System.DirectoryServicesが必要。
DirectoryEntry directoryEntry = new DirectoryEntry( "LDAP://rootDSE" );
Console.WriteLine( directoryEntry.Properties["defaultNamingContext"].Value);
LDAP+VBS
Set objDomain = GetObject( "LDAP://rootDSE" )
Wscript.Echo objDomain.Get( "defaultNamingContext" )