<TextBlock Text="0">
<toolkit:GestureService.GestureListener>
<toolkit:GestureListener Flick="GestureListener_Flick" />
</toolkit:GestureService.GestureListener>
</TextBlock>
private void GestureListener_Flick(object sender, FlickGestureEventArgs e)
{
//use e.Direction to determine which way
}