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

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

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Get the JEDI conversion of the Microsoft IP Helper Library from the Project JEDI API Header Library - the file is IPHlpAPI.zip. Unpack the files, you need IpTypes.pas and IpHlpApi.pas. Then you can use something like this:

procedure TForm1.Button1Click(Sender: TObject);
var
  NumInterfaces: Cardinal;
  AdapterInfo: array of TIpAdapterInfo;
  OutBufLen: ULONG;
  i: integer;
begin
  GetNumberOfInterfaces(NumInterfaces);
  SetLength(AdapterInfo, NumInterfaces);
  OutBufLen := NumInterfaces * SizeOf(TIpAdapterInfo);
  GetAdaptersInfo(@AdapterInfo[0], OutBufLen);

  Memo1.Lines.Clear;
  for i := 0 to NumInterfaces - 1 do begin
    Memo1.Lines.Add(Format('%.2x:%.2x:%.2x:%.2x:%.2x:%.2x',
      [AdapterInfo[i].Address[0], AdapterInfo[i].Address[1],
       AdapterInfo[i].Address[2], AdapterInfo[i].Address[3],
       AdapterInfo[i].Address[4], AdapterInfo[i].Address[5]]));
  end;
end;

(All error handling omitted, you should add it of course.)


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