title: execute code when TextBox is tapped or clicked?
body: <p>I tried this event handlers on my textbox:</p>
  
  <pre><code>private void TextBox_Tapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
  {
      //do this
  }
  </code></pre>
  
  <p>I also tried <code>LayoutUpdated</code>, <code>SelectionChanged</code>, <code>PointerEntered</code>, <code>PointerReleased</code>. None of them execute codes as soon as I click the box.</p>