How do I get the MAC address of a network card using Delphi?

Question

How do I get the MacAddress of an Network Card using Delphi ?

Answer 1

if you have Indy then you can use MB30 (code taken from https://www.swissdelphicenter.ch/en/showcode.php?id=651 )

uses classes, sysUtils, NB30;

function GetMACAdress: TStringList;
var
  NCB: PNCB;
  Adapter: PAdapterStatus;

  URetCode: PChar;
  RetCode: char;
  I: integer;
  Lenum: PlanaEnum;
  _SystemID: string;
  TMPSTR: string;

begin
  Result    := TStringList.create();
  _SystemID := '';
  Getmem(NCB, SizeOf(TNCB));
  Fillchar(NCB^, SizeOf(TNCB), 0);

  Getmem(Lenum, SizeOf(TLanaEnum));
  Fillchar(Lenum^, SizeOf(TLanaEnum), 0);

  Getmem(Adapter, SizeOf(TAdapterStatus));
  Fillchar(Adapter^, SizeOf(TAdapterStatus), 0);

  Lenum.Length    := chr(0);
  NCB.ncb_command := chr(NCBENUM);
  NCB.ncb_buffer  := Pointer(Lenum);
  NCB.ncb_length  := SizeOf(Lenum);
  RetCode         := Netbios(NCB);

  try
    i := 0;
    repeat
      Fillchar(NCB^, SizeOf(TNCB), 0);
      Ncb.ncb_command  := chr(NCBRESET);
      Ncb.ncb_lana_num := lenum.lana[I];
      RetCode          := Netbios(Ncb);

      Fillchar(NCB^, SizeOf(TNCB), 0);
      Ncb.ncb_command  := chr(NCBASTAT);
      Ncb.ncb_lana_num := lenum.lana[I];
      // Must be 16
      Ncb.ncb_callname := '*               ';

      Ncb.ncb_buffer := Pointer(Adapter);

      Ncb.ncb_length := SizeOf(TAdapterStatus);
      RetCode        := Netbios(Ncb);
      //---- calc _systemId from mac-address[2-5] XOR mac-address[1]...
      if (RetCode = chr(0)) or (RetCode = chr(6)) then
      begin
        _SystemId := IntToHex(Ord(Adapter.adapter_address[0]), 2) + '-' +
          IntToHex(Ord(Adapter.adapter_address[1]), 2) + '-' +
          IntToHex(Ord(Adapter.adapter_address[2]), 2) + '-' +
          IntToHex(Ord(Adapter.adapter_address[3]), 2) + '-' +
          IntToHex(Ord(Adapter.adapter_address[4]), 2) + '-' +
          IntToHex(Ord(Adapter.adapter_address[5]), 2);

        if (_SystemID <> '00-00-00-00-00-00') and (Result.IndexOf(_SystemID)=-1) then
         Result.add(_SystemId);
      end;
      Inc(i);
    until (I >= Ord(Lenum.Length));
  finally
   FreeMem(NCB);
   FreeMem(Adapter);
   FreeMem(Lenum);
  end;
end;