rab

    OpenVMS usage:rab
    type:         longword (unsigned)
    access:       modify
    mechanism:    by reference

    RAB control block whose contents are to be used as indirect
    arguments for the Connect service call. The rab argument is the
    address of the RAB control block.

 err

    OpenVMS usage:ast_procedure
    type:         procedure value
    access:       call without stack unwinding
    mechanism:    by reference

    AST-level error completion routine that the Connect service
    invokes if the operation is unsuccessful. The err argument is
    the address of the entry mask of this user-written completion
    routine.

 suc

    OpenVMS usage:ast_procedure
    type:         procedure value
    access:       call without stack unwinding
    mechanism:    by reference

    AST-level success completion routine that the Connect service
    invokes if the operation is successful. The suc argument is
    the address of the entry mask of this user-written completion
    routine.