title: Delphi - How to use more defined values in conditional compilation
body: <p>Can I combine some IFDEFS in my source?</p>
  
  <p>For example:</p>
  
  <pre><code>{$IFDEF INCOMING or OUTGOING}
  ...
  {$ENDIF}
  </code></pre>
  
  <p>Thanks for your help:
     dd</p>