title: WP7, C#, Increase slider value by holding a button
body: <p>I have to increase the slider control value while holding a button.<br>
  As long as I am holding the button the slider has to keep increasing.  </p>
  
  <p>For example, the scenario is typical with volume control.<br>
  I have a slider for volume and a button <code>Increase</code> for volume.<br>
  Now as long as I keep holding the <code>Increase</code> button, the volume (marker) in the slider should keep increasing continuously till I release the button.</p>
  
  <p>What I have achieved is changing the value of the slider on individual <strong>click</strong> events on the button.<br>
  Kindly give your suggestions on how I can achieve this.</p>