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uses

  WinInet;

function GetProxyInformation: string;

var

  ProxyInfo: PInternetProxyInfo;

  Len: LongWord;

begin

  Result := '';

  Len := 4096;

  GetMem(ProxyInfo, Len);

  try

    if InternetQueryOption(nil, INTERNET_OPTION_PROXY, ProxyInfo, Len) then

      if ProxyInfo^.dwAccessType = INTERNET_OPEN_TYPE_PROXY then

      begin

        Result := ProxyInfo^.lpszProxy

      end;

  finally

    FreeMem(ProxyInfo);

  end;

end;

{**************************************************************************

* NAME:    GetProxyServer

* DESC:    Proxy-Server Einstellungen abfragen

* PARAMS:  protocol => z.B. 'http' oder 'ftp'

* RESULT:  [-]

* CREATED: 08-04-2004/shmia

*************************************************************************}

procedure GetProxyServer(protocol: string; var ProxyServer: string;

  var ProxyPort: Integer);

var

  i: Integer;

  proxyinfo, ps: string;

begin

  ProxyServer := '';

  ProxyPort := 0;

  proxyinfo := GetProxyInformation;

  if proxyinfo = '' then

    Exit;

  protocol := protocol + '=';

  i := Pos(protocol, proxyinfo);

  if i > 0 then

  begin

    Delete(proxyinfo, 1, i + Length(protocol));

    i := Pos(';', ProxyServer);

    if i > 0 then

      proxyinfo := Copy(proxyinfo, 1, i - 1);

  end;

  i := Pos(':', proxyinfo);

  if i > 0 then

  begin

    ProxyPort := StrToIntDef(Copy(proxyinfo, i + 1, Length(proxyinfo) - i), 0);

    ProxyServer := Copy(proxyinfo, 1, i - 1)

  end

end;

procedure TForm1.Button1Click(Sender: TObject);

var

  ProxyServer: string;

  ProxyPort: Integer;

begin

  GetProxyServer('http', ProxyServer, ProxyPort);

  Label1.Caption := ProxyServer;

  label2.Caption := IntToStr(ProxyPort);

end;