title: Indy 10: Undeclared Identifier 'TIdBytes'
body: <p>Sorry if my question is silly!</p>
  <p>I'm using <strong>Delphi XE4</strong> and now I'm working on <code>IdTelnet</code>. But I got a problem with <code>OnDataAvailable</code> event. Take a look at this picture:</p>
  <p><img src="https://i.stack.imgur.com/LuIvp.jpg" alt="enter image description here" /></p>
  <p>So I cannot work with <code>OnDataAvailable</code> Event.</p>
  <p>Is this because of Delphi XE4? And How can I fix it?</p>
  <p>Thanks</p>