>>-aScrollBar~SetPos(--position--+-----------+--)-------------->< +-,--redraw-+
The SetPos method sets the position of the scroll box for the associated scroll bar.
The arguments are:
The position to which the scroll box is to be moved.
If you specify 1 or Y, the scroll bar is redrawn using the new position. Otherwise, the new position is set, but the scroll bar display is not updated. The default value is 1.
Setting the position was successful.
For all other cases.