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  SHOWCLRS()                                                  Color Function
 Purpose..: Display all color combinations
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 Syntax...: ShowClrs( <nX>, <nY> [, <cType>] ) --> NIL

 Arguments: <nX>         = Top row.
            <nY>         = Left column.
            [<cType>]    = ASCII character to display when
                           the color table is drawn. It is used to
                           display the difference between
                           the foreground/background combination.

 Returns..: NIL

 Remark...: The function is essential to MkClrTable()
            which uses the color table. You can use it to
            create a function such as ColourPick(), in the demo,
            from which you can pick and return a color string.

 Source...: SHOWCLRS.C
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 Example..: The example uses the function
            to set up a color table using "." or chr( 249 )
            as the character for the color table.

            ShowClrs( nX, nY, chr( 249 ) )