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ULONG WINAPI GetAdaptersAddresses(
  ULONG Family,
  ULONG Flags,
  PVOID Reserved,
  PIP_ADAPTER_ADDRESSES AdapterAddresses,
  PULONG SizePointer
);                    

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function GetAdaptersaddresses(?):?; stdcall;
external 'IPHLPAPI.DLL';                    

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function GetAdaptersAddresses(Family: ULONG; Flags: DWORD; Reserved: PVOID;
  pAdapterAddresses: PIP_ADAPTER_ADDRESSES; pOutBufLen: PULONG): DWORD; stdcall;                    

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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, jwaiphlpapi,jwaiptypes,jwawinsock2,Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var adapter:IP_ADAPTER_ADDRESSES;
    i:integer;
    adresse:string;
    a:pointer;
begin
GetAdaptersAddresses(AF_UNSPEC,GAA_FLAG_INCLUDE_PREFIX,Nil,@adapter,@a);
for i:=0 to 7 do
adresse:=adresse+'-'+inttohex(ord(adapter.PhysicalAddress[i]),2);
memo1.lines.add(adresse);
end;

end.                    

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PIP_ADAPTER_ADDRESSES = ^_IP_ADAPTER_ADDRESSES;
  {$EXTERNALSYM PIP_ADAPTER_ADDRESSES}
  _IP_ADAPTER_ADDRESSES = record
    Union: record
      case Integer of
        0: (
          Alignment: ULONGLONG);
        1: (
          Length: ULONG;
          IfIndex: DWORD);
    end;
    Next: PIP_ADAPTER_ADDRESSES;
    AdapterName: PCHAR;
    FirstUnicastAddress: PIP_ADAPTER_UNICAST_ADDRESS;
    FirstAnycastAddress: PIP_ADAPTER_ANYCAST_ADDRESS;
    FirstMulticastAddress: PIP_ADAPTER_MULTICAST_ADDRESS;
    FirstDnsServerAddress: PIP_ADAPTER_DNS_SERVER_ADDRESS;
    DnsSuffix: PWCHAR;
    Description: PWCHAR;
    FriendlyName: PWCHAR;
    PhysicalAddress: array [0..MAX_ADAPTER_ADDRESS_LENGTH - 1] of BYTE;
    PhysicalAddressLength: DWORD;
    Flags: DWORD;
    Mtu: DWORD;
    IfType: DWORD;
    OperStatus: IF_OPER_STATUS;
    Ipv6IfIndex: DWORD;
    ZoneIndices: array [0..15] of DWORD;
    FirstPrefix: PIP_ADAPTER_PREFIX;
  end;
  {$EXTERNALSYM _IP_ADAPTER_ADDRESSES}
  IP_ADAPTER_ADDRESSES = _IP_ADAPTER_ADDRESSES;
  {$EXTERNALSYM IP_ADAPTER_ADDRESSES}
  TIpAdapterAddresses = IP_ADAPTER_ADDRESSES;
  PIpAdapterAddresses = PIP_ADAPTER_ADDRESSES;                    

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GetMac /V > mac.txt                    

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uses  ..., jwaiphlpapi,jwaiptypes,jwawinsock2,...

.
.
.

procedure TForm1.Button1Click(Sender: TObject);
var adapter:pip_adapter_addresses;
    buffer:dword;
    Error:dword;
    P:pointer;
begin
buffer:=sizeof(adapter^);
new(adapter);
error:=GetAdaptersAddresses(0,0,nil,adapter,@buffer);
p:= adapter;
if error = no_error then
   begin

   end
    else
   begin
   memo1.Clear;
   memo1.lines.add(SysErrorMessage( Error ));
   end;
end;                    

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type
  TfrmMain = class(TForm)
    meLog: TMemo;
    BtnStart: TButton;
    procedure BtnStartClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
//...
uses
  jwaiphlpapi, jwaiptypes, jwawinsock2;

function CheckWinXP: Boolean;
begin
  Result := (Win32Platform = 2) and
            (Win32MajorVersion = 5) and
            (Win32MinorVersion >= 1);
end;

procedure TfrmMain.FormCreate(Sender: TObject);
begin
  // naja, das Ding bricht sowieso schon vorher ins Essen,
  // weil die statische Bindung der DLL nicht klappen wird...
  if NOT CheckWinXP then begin
    MessageDlg('Required OS: >= WinXP!',mtInformation,[mbCancel],0);
    Application.Terminate;
  end;
end;

procedure TfrmMain.BtnStartClick(Sender: TObject);
  var
    dwFamily,
    dwFlags,
    dwBufLen,
    dwRetVal: DWORD;
    pAddresses,
    pCurrAddresses: PIP_ADAPTER_ADDRESSES;

    pUnicast: PIP_ADAPTER_UNICAST_ADDRESS;
    pAnycast: PIP_ADAPTER_ANYCAST_ADDRESS;
    pMulticast: PIP_ADAPTER_MULTICAST_ADDRESS;
    pDnServer: PIP_ADAPTER_DNS_SERVER_ADDRESS;
    pPrefix: PIP_ADAPTER_PREFIX;

    i: Integer;
    tmp: String;

  procedure Logout(const S: String);
  begin
    meLog.Lines.Add(S);
  end;

begin
  meLog.Clear;
  dwFamily := AF_UNSPEC;
  dwFlags := GAA_FLAG_INCLUDE_PREFIX;
  dwBufLen := SizeOf(IP_ADAPTER_ADDRESSES);
  GetMem(pAddresses,dwBufLen);
  if Assigned(pAddresses) then
    try
      if (GetAdaptersAddresses(dwFamily, dwFlags, NIL, pAddresses, @dwBufLen) = ERROR_BUFFER_OVERFLOW) then begin
        FreeMem(pAddresses);
        GetMem(pAddresses,dwBufLen);
        if Assigned(pAddresses) then begin
          dwRetVal := GetAdaptersAddresses(dwFamily, dwFlags, NIL, pAddresses, @dwBufLen);
          if (dwRetVal = NO_ERROR) then begin
// -----------------------------------------------------------------------------
            pCurrAddresses := pAddresses;
            while Assigned(pCurrAddresses) do begin
              Logout('Length of the IP_ADAPTER_ADDRESS struct: '+IntToStr(pCurrAddresses^.Union.Length));
              Logout('IfIndex (IPv4 interface): '+IntToStr(pCurrAddresses^.Union.IfIndex));
              Logout('Adapter name: '+pCurrAddresses^.AdapterName);

              pUnicast := pCurrAddresses^.FirstUnicastAddress;
              if Assigned(pUnicast) then begin
                i := 0;
                while Assigned(pUnicast) do begin
                  pUnicast := pUnicast^.Next;
                  Inc(i);
                end;
                Logout('Number of Unicast Addresses: '+IntToStr(i));
              end
              else
                Logout('No Unicast Addresses');

              pAnycast := pCurrAddresses^.FirstAnycastAddress;
              if Assigned(pAnycast) then begin
                i := 0;
                while Assigned(pAnycast) do begin
                  pAnycast := pAnycast^.Next;
                  Inc(i);
                end;
                Logout('Number of Anycast Addresses: '+IntToStr(i));
              end
              else
                Logout('No Anycast Addresses');

              pMulticast := pCurrAddresses^.FirstMulticastAddress;
              if Assigned(pMulticast) then begin
                i := 0;
                while Assigned(pMulticast) do begin
                  pMulticast := pMulticast^.Next;
                  Inc(i);
                end;
                Logout('Number of Multicast Addresses: '+IntToStr(i));
              end
              else
                Logout('No Multicast Addresses');

              pDnServer := pCurrAddresses^.FirstDnsServerAddress;
              if Assigned(pDnServer) then begin
                i := 0;
                while Assigned(pDnServer) do begin
                  pDnServer := pDnServer^.Next;
                  Inc(i);
                end;
                Logout('Number of DNS Server Addresses: '+IntToStr(i));
              end
              else
                Logout('No DNS Server Addresses');

              Logout('DNS Suffix: '+pCurrAddresses^.DnsSuffix);
              Logout('Description: '+pCurrAddresses^.Description);
              Logout('Friendly name: '+pCurrAddresses^.FriendlyName);

              if (pCurrAddresses^.PhysicalAddressLength <> 0) then begin
                tmp := '';
                for i := 0 to pCurrAddresses^.PhysicalAddressLength -1 do begin
                  tmp := tmp +IntToHex(pCurrAddresses^.PhysicalAddress[i],2);
                  if (i < Integer(pCurrAddresses^.PhysicalAddressLength -1)) then
                    tmp := tmp +'-';
                end;
                Logout('Physical address: '+tmp);
              end;
              Logout('Flags: '+IntToStr(pCurrAddresses^.Flags));
              Logout('MTU: '+IntToStr(pCurrAddresses^.Mtu));
              Logout('IfType: '+IntToStr(pCurrAddresses^.IfType));
              Logout('OperStatus: '+IntToStr(Integer(pCurrAddresses^.OperStatus)));
              Logout('Ipv6IfIndex (IPv6 interface): '+IntToStr(pCurrAddresses^.Ipv6IfIndex));
              tmp := '';
              for i := 0 to 15 do
                  tmp := tmp +IntToHex(pCurrAddresses^.ZoneIndices[i],8);
              Logout('ZoneIndices (hex): '+tmp);

              pPrefix := pCurrAddresses^.FirstPrefix;
              if Assigned(pPrefix) then begin
                i := 0;
                while Assigned(pPrefix) do begin
                  pPrefix := pPrefix^.Next;
                  Inc(i);
                end;
                Logout('Number of IP Adapter Prefix entries: '+IntToStr(i));
              end
              else
                Logout('Number of IP Adapter Prefix entries: 0');
              Logout('');
              pCurrAddresses := pCurrAddresses^.Next;
            end; // while
// -----------------------------------------------------------------------------
          end
          else begin
            if (dwRetVal = ERROR_NO_DATA) then
              MessageDlg('No adapter information available!',mtInformation,[mbOK],0)
            else
              SysErrorMessage(dwRetVal);
          end;
        end
        else
          MessageDlg('Out of memory! (2)',mtError,[mbCancel],0);
      end;
    finally
      FreeMem(pAddresses);
    end
  else
    MessageDlg('Out of memory! (1)',mtError,[mbCancel],0);
end;