title: WPF event trigger for clear TextBox
body: <p>So i have the <code>TextBox</code>:</p>
  
  <pre><code>&lt;TextBox Controls:TextBoxHelper.ClearTextButton="True"
           LostFocus="textboxNewValueCell_LostFocus"
           TextChanged="textboxNewValueCell_TextChanged"/&gt;
  </code></pre>
  
  <p>And when press on <code>Clear</code> button i want to catch the <code>event</code>.</p>
  
  <p>Is it possible ?</p>
  
  <p>I did not find any <code>event</code></p>