Как получить mac адрес компьютера в delphi?

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uses NB30;
 
...
 
function GetAdapterInfo(Lana: Char): string;
var
  Adapter: TAdapterStatus;
  NCB: TNCB;
begin
  FillChar(NCB, SizeOf(NCB), 0);
  NCB.ncb_command := Char(NCBRESET);
  NCB.ncb_lana_num := AnsiChar(Lana);
  if Netbios(@NCB) <> Char(NRC_GOODRET) then
  begin
    Result := 'Адрес не известен';
    Exit;
  end;
 
  FillChar(NCB, SizeOf(NCB), 0);
  NCB.ncb_command := Char(NCBASTAT);
  NCB.ncb_lana_num := AnsiChar(Lana);
  NCB.ncb_callname := '*';
 
  FillChar(Adapter, SizeOf(Adapter), 0);
  NCB.ncb_buffer := @Adapter;
  NCB.ncb_length := SizeOf(Adapter);
  if Netbios(@NCB) <> Char(NRC_GOODRET) then
  begin
    Result := 'Адрес не известен';
    Exit;
  end;
  Result :=
  IntToHex(Byte(Adapter.adapter_address[0]), 2) + '-' +
  IntToHex(Byte(Adapter.adapter_address[1]), 2) + '-' +
  IntToHex(Byte(Adapter.adapter_address[2]), 2) + '-' +
  IntToHex(Byte(Adapter.adapter_address[3]), 2) + '-' +
  IntToHex(Byte(Adapter.adapter_address[4]), 2) + '-' +
  IntToHex(Byte(Adapter.adapter_address[5]), 2);
end;
 
function GetMACAddress: string;
var
  AdapterList: TLanaEnum;
  NCB: TNCB;
begin
  FillChar(NCB, SizeOf(NCB), 0);
  NCB.ncb_command := Char(NCBENUM);
  NCB.ncb_buffer := @AdapterList;
  NCB.ncb_length := SizeOf(AdapterList);
  Netbios(@NCB);
  if Byte(AdapterList.length) > 0 then
    Result := GetAdapterInfo(Char(AdapterList.lana[0]))
  else
    Result := 'Адрес не известен';
end;

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procedure TForm1.Button1Click(Sender: TObject);
var
  mac_adr: string;
begin
   mac_adr:= GetMacAddress;
   ShowMessage(mac_adr);
end;