context

    type:      longword
    access:    read only
    mechanism: by reference
    Context area initialized by ENCRYPT$INIT. The context argument
    is the address of a longword initialized by the ENCRYPT$INIT
    routine.

 code

    type:      longword
    access:    read only
    mechanism: by reference
    Code specifying the desired statistic. The code argument is the
    address of a longword containing the code. The only accepted
    value is 1, which indicates that ENCRYPT$STATISTICS is to return
    all statistics to the destination buffer.

 destination

    type:      char_string
    access:    write only
    mechanism: by descriptor
    Buffer into which ENCRYPT$STATISTICS places the statistics.
    The destination argument is the address of a string descriptor
    describing the buffer. Ensure that the destination buffer is at
    least 20 bytes long and contains:

    o  One longword indicating the number of times the primitive has
       been entered referencing this encryption stream

    o  One quadword indicating the total bytes processed for this
       stream

    o  One quadword indicating the total CPU time, in OpenVMS time
       format, spent on processing requests for this stream

 return-length

    type:      longword
    access:    write only
    mechanism: by reference
    Number of bytes written to the destination buffer. The return-
    length argument is the address of a word containing the number of
    bytes.