True
, MUI will automatically make this
scrollgroup controllable from gadgets in the window border.
MUI will use the right border scroller if the virtual
groups is allowed to move vertically and the bottom
border scroller if the virtual group is allowed to move
horizontally.
You must set the corresponding window attributes, e.g. you have to set the attribute Window.UseRightBorderScroller for your parent window to use this feature.