# File lib/chef/win32/security.rb, line 336
      def self.lookup_privilege_value(system_name, name)
        luid = FFI::Buffer.new(:uint64).write_uint64(0)
        system_name = system_name.to_wstring if system_name
        unless LookupPrivilegeValueW(system_name, name.to_wstring, luid)
          Win32::Error.raise!
        end
        luid.read_uint64
      end