Using Indy 10 UDP server, AData: TStream or AData: TBytes?

My old indy udp project used to use:

procedure TForm1.IdUDPServer1UDPRead(Sender: TObject; AData: TStream;
  ABinding: TIdSocketHandle);
DataStringStream := TStringStream.Create('');
  try
  DataStringStream.CopyFrom(AData, AData.Size);
  msg:= DataStringStream.DataString;
  finally
  DataStringStream.Free;

To get the message being broadcasted.

Since converting to indy 10, the new udp server has:

procedure TForm1.IdUDPServer1UDPRead(Sender: TObject; AData: TBytes;
  ABinding: TIdSocketHandle);


How do I convert my existing code?
Oddly, from what I can see, the ‘Indy In Depth 10’ book has an example
which uses AData: TStream; rather than AData: TBytes.

Thanks for any help given.

Pete

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