title: Implement Pivot in WinRT Apps with flipView and a user control for the headers
body: <p>I want to implement a behavor of pivot (control availble only in WP8),for that I use a flipView and for the headers I use a user control where I place a list of buttons which simulate the headers.
  I need to highlight the Correspondant button (header) when I pass from a flipViewItem to another!
  any help please! </p>