The ScrollBars you mentioned are coming from the PivotGrid Template. So what I can suggest you would be manually get them from the Template of the PivotGrid and subscribe to their ValueChanged event - you can do all that in the Loaded event handler of the PivotGrid as shown below:
sender, RoutedEventArgs e)
var verScrollBar =
verScrollBar.ValueChanged += verScroll_ValueChanged;
// save the value here e.NewValue
This way you will be able to save their value each time the scroller moves. The other ScrollBar is named PART_HorizontalScrollBar.
Hope this will work for you.
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