title: Get scroll event for ScrollViewer on Windows Phone
body: <p>Question:
  Get scroll event for ScrollViewer on Windows Phone</p>
  
  <p>I have a scrollviewer like so:</p>
  
  <pre><code>&lt;Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0"&gt;
      &lt;ScrollViewer x:Name="MyScroller"&gt;
          &lt;StackPanel&gt;
              &lt;!-- ... --&gt;
          &lt;/StackPanel&gt;
      &lt;/ScrollViewer&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>I need the event for when the scrolling occurs for MyScroller:</p>
  
  <pre><code>// MyScroller.Scroll += // &lt;-- "Scroll" event does not exist on ScrollViewer
  MyScroller.MouseWheel += MyScroller_MouseWheel; // Does not fire on scroll
  MyScroller.ManipulationDelta += MyScroller_ManipulationDelta; // Fires for pinch-zoom only
  </code></pre>