title: WPF popup with textbox?
body: <p>I am trying to create a control that displays search results as a user types something in a textbox. For this, I have a textbox and a popup that shows up when the user types something into it (just like a google search box). Like so,</p>
  
  <pre><code>&lt;Grid&gt; &lt;TextBox Name="userEntry" /&gt; &lt;Popup /&gt; &lt;/Grid&gt;
  </code></pre>
  
  <p>Now when the user starts typing into the textbox i want the popup to show and stay open until the user focusses on some other ui control or if the text entered is empty.
  I am unable to achieve this easily and was wondering if there are alternate better ways of doing this in wpf.
  Regards</p>