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  SBEND1()                                               Scroll Bar Function
 Purpose..: Return the beginning of the scroll bar
-------------------------------------------------------------------------------
 Syntax...: sbEnd1( <aSBar> ) --> nStart

 Arguments: <aSBar>     = scroll bar structure returned via
                          a call to sbNew().

 Returns..: <N> nStart is the beginning position of the scroll bar. It
            will be the top row of a vertical scroll bar or the left
            column of a horizontal one.

 Source...: SCRLBAR.PRG
-------------------------------------------------------------------------------
 Example..: . The example prints out the top and bottom
              rows of a vertical scroll bar.

                aVertSB := sbNew( SB_VSCROLL )
                sbChrThumb( aVertSB, "." )
                sbChrBar  ( aVertSB, "#" )
                sbChrDec  ( aVertSB, "." )
                sbChrInc  ( aVertSB, "." )
                sbClrSpec ( aVertSB, "W+/B, B/*W, W+/B" )
                sbSetRange( aVertSB, 1, len( aArray ) - nScrLength + 1 )
                ...
                ? sbEnd1( aVertSB )
                ? sbEnd2( aVertSB )
                ...