title: Ensure WPF Taskbar Window Preview is actualized
body: <p>How can I ensure that the hower preview of my WPF application (.net 4) is refreshed when the user places the mouse over the taskbar icon.<br>
  I have an app that visualizes some status values. If the app window is minimized and the user hovers over the taskbar button, the preview window that is shown shows the last view of the window at which the window was active. However I would like to have an actualized view.<br>
  Is there a possiblity to achieve that?</p>