FT_DESCEND()
 Create a descending index key value
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 Syntax

      FT_Descend( <exp> ) -> <value>

 Arguments

     <exp> is any expression of character, numeric, date, or logical type.

 Returns

     The inverse of <exp>

 Description

     This function is a replacement for CA-Clipper's Descend() function,
     which is known to produce memory corruption occassionally.

 Examples

     ? FT_Descend( 1 )      // Returns -1

 Source: DESCEND.C

 Author: Ted Means