If you specify None here, your listview won't get a scroller at all and look much like a list object alone. However, listviews without scroller are still more powerful than list objects as they feature e.g. drag&drop possibilities.

Creating listviews without a scrollbar makes sense if you want to have the scrollbar somewhere else, e.g. outside of a horizontal virtual group where the listview resides. This technique allows the creation of horizontally scrollable listviews.

The following options are possible:

Default

Position scrollbar according to user preferences.

Left

Position scrollbar to the left of the listview.

Right

Position scrollbar to the right of the listview.

None

No scrollbar.