Encode a string
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 Syntax

        GT_Encode( cString )

 Arguments:

      cString - String to be encoded

 Returns:

      The encoded representation of cString.

 Description:

      Uses an encryption algorithm to encode a string that can later be
      decoded using GT_Decode().

      WARNING - The encryption technique doubles the length of the string!

 Examples:



 Header File: GT_LIB.CH

 Source: ENCRYPT.PRG

 Author:  Martin Colloby