procedure TForm1.SpeedButton1Click(Sender: TObject);begin	udp.Send('localhost', 1234, 'abc123'); // 发送字符， 这样发中文接收方会乱码end;procedure TForm1.SpeedButton2Click(Sender: TObject);var	b: TBytes;	s: string;begin	s := '你好';	b := BytesOf(s);	udp.SendBuffer('localhost', 1234, TIdBytes(b));  // TIdBytes要引用IdGlobal.pas单元end;