I have a listbox of many richtextboxex in it.
Now I want to enable an auto scrolling feature for it.
I can't just do `listBox.SelectedIndex++;`in a timer or somthing, because then it will just go to the other richtextbox and I don't want that.
I'd like somthing more like this 

```
sv.ScrollToVerticalOffset(sv.VerticalOffset + 5);

```

which works perfectly in scroll view, can I implement the same thing to a listbox?