Adds a new Resource Manager (RM) participant to a transaction.

    Format

      SYS$JOIN_RM  [efn] ,[flags] ,iosb ,[astadr] ,[astprm] ,rm_id

                   [,[tid] ,[part_name] ,[rm_context] ,[timout]

                   ,[bid]]

    C Prototype

      int sys$join_rm  (unsigned int efn, unsigned int flags, struct

                       _iosb *iosb, void (*astadr)(__unknown_params),

                       int astprm, unsigned int rm_id,...);