New function to get error code for ENCRYPT()/DECRYPT()

        failure.    Version Ref: 5.8 (not included in filePro Lite)

            status = CRYPTERROR( [format] )

        If "format" is omitted, or zero, then the value is returned as a numeric error number, or zero for "no error".  If "format" is "1", then the value is returned as a string.  Other values for "format" are undefined.  (If ENCRYPT/DEcrypt fails, a null string -- "" -- is returned.)