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  public static readonly DependencyProperty FocusedRowDataIndexProperty =
   DependencyProperty.Register("FocusedRowDataIndex", typeof(int), typeof(GroupColumnGridCtrl), new PropertyMetadata(0, OnFocusedRowDataIndexPropertyChanged));

  private static void OnFocusedRowDataIndexPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
  {
   GroupColumnGridCtrl grid = d as GroupColumnGridCtrl;
   if (grid == null)
   {
    return;
   }
   grid.OnFocusedRowDataIndexChanged((int)e.NewValue, (int)e.OldValue);
  }

 

   // Make the property work in xaml

  public int FocusedRowDataIndex
  {
   get { return (int)GetValue(FocusedRowDataIndexProperty); }
   set { SetValue(FocusedRowDataIndexProperty, value); }
  }