Creates a new Resource Manager instance (RMI) in the calling
    process. $DECLARE_RMW always waits for the request to complete
    before returning to the caller. Other than this, it is identical
    to $DECLARE_RM.

    Format

      SYS$DECLARE_RMW  [efn] ,[flags] ,iosb ,[astadr] ,[astprm]

                       ,rm_id ,event_handler ,[part_name]

                       [,[rm_context] ,[acmode] ,[tm_log_id]

                       ,[event_mask]]

    C Prototype

      int sys$declare_rmw  (unsigned int efn, unsigned int

                           flags, struct _iosb *iosb, void

                           (*astadr)(__unknown_params), int

                           astprm, unsigned int *rm_id, void

                           (*event_handler)(__unknown_params),...);