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<form
action="http://15.160.15.10/SCRIPTS/hsrun.exe/Distributed50/GOAachen/MapXtreme.htx;start=Authorize"
method="post">
  <input type="hidden" name="username" value="d"><input type="hidden" name="passwort"
  value="d"><input type="hidden" name="gotoPosition" value="true"><h1>Intranet Server</h1>
  <p><input value="2503041" name="Xvalue" size="20"><input value="5626144" name="Yvalue"
  size="20"><input value="1.100" name="Zvalue" size="20"></p>
  <p><input type="submit" value="Absenden" name="btnOK"></p>
</form>					

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var
  Request: TStringList;
  Response: TStringStream;
begin
  Request := TStringList.Create;
  Response := TStringStream.Create('');
  IdHttp.Request.ContentType := 'application/x-www-form-urlencoded';
  Request.Add('user=test');
  Request.Add('&password=test');
  IdHttp.Post('http://test.de, Request, Response);
end;