code

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    A code from EDT that specifies the operation to be performed.
    The code argument is the address of a longword integer containing
    this argument. The valid function codes are as follows:

    Function Code    Description

    EDT$K_OPEN_IN_   Open the work file for both input and output.
    OUT              Neither the record nor recordno argument is
                     used.
    EDT$K_GET        Read a record. The recordno argument is the
                     number of the record to be read. The record
                     argument gives the location where the record is
                     to be stored.
    EDT$K_PUT        Write a record. The recordno argument is the
                     number of the record to be written. The record
                     argument tells the location of the record to be
                     written.
    EDT$K_CLOSE_DEL  Close the work file. After a successful close,
                     the file is deleted. Neither the record nor
                     recordno argument is used.

 recordno

    OpenVMS usage:longword_signed
    type:         longword integer (signed)
    access:       read only
    mechanism:    by reference
    Number of the record to be read or written. The recordno argument
    is the address of a longword integer containing this argument.
    EDT always writes a record before reading that record. This
    argument is not used for open or close calls.

 record

    OpenVMS usage:char_string
    type:         character string
    access:       modify
    mechanism:    by descriptor
    Location of the record to be read or written. This argument
    always refers to a 512-byte string during GET and PUT calls.
    This argument is not used for open or close calls.