The Connect service establishes a record stream by associating
    and connecting a RAB with a FAB. You can invoke the Connect
    service only for files that are already open. The maximum number
    of record streams that can be connected within an image at one
    time is 16383.

                               RAB64 USERS

       RAB64 can replace the RAB or RAB prefix wherever it is used
       with the Connect service on OpenVMS Alpha systems.

    Format

      SYS$CONNECT  rab [,[err] [,suc]]

1  –  Returns

    OpenVMS usage:cond_value
    type:         longword
    access:       write only
    mechanism:    by value

    The value is returned in symbolic offset RAB$L_STS. Symbolic
    offset RAB$L_STV may contain additional status information.

2  –  Arguments

 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.

3  –  Condition Values Returned

 The following condition values can be returned. Use the Help Message
 utility to access online message descriptions.