title: Joining the Clipboard Chain Best practices
body: <p>Further to my <a href="https://stackoverflow.com/q/8695081/744588">post</a> on custom format clipboard, I am considering the possibility of writing my own custom clipboad monitoring component.</p>
  
  <p>Prior to the statement:</p>
  
  <pre><code>ClipboardWindow:=SetClipboardViewer(Form1.Handle);
  </code></pre>
  
  <p>I have seen in a sample code I studied the following snippet:</p>
  
  <pre><code>OpenClipboard(Form1.Handle); 
  EmptyClipboard; 
  CloseClipboard;
  </code></pre>
  
  <p>whereas others don't include a cleaning code at all. I am confused.</p>
  
  <p>I believe <code>Clipbrd.TClipboard.Clear</code> just does the same the VCL way.</p>
  
  <p>My <strong>question</strong> is:</p>
  
  <p>When clearing the clipboard before joining the <code>clipboard chain</code> is mandatory ?</p>