Scrollbar
 Creates a scroll bar
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 Description

     Scroll bars allow users to view data that exists beyond the limit of a
     window.  By scrolling up, down, left, or right, you can reveal
     previously hidden pieces of data.  Applications should provide scroll
     bars for any screen in which the data displayed is larger than the
     current window.

 Examples

     .  This example creates a vertical scroll bar from row 2 to 10:

        oScr:=(2,10,0)