FN_NEG()
 Calculate the two's complement of a number
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 Syntax
    fn_neg( <nInt> | <cInt> ) -> nResult
 Arguments

   <nInt> may either be a numeric integer, or a 16-bit character string
   that is the binary representation of a numeric integer.

 Returns

   <nResult>, a numeric

 Description

    The value returned is obtained by negating <nInt>
    (i.e. obtaining the two's complement). If any parameters
    are invalid, the function will return zero.

 Examples

    nX := 1
    nNum := fn_neg( nX )
    ? nNum    //  -1


 Source: N:\SRC\MISC\FNNEG.ASM

 Author: Ted Means