$START_BRANCHW

   Adds a new branch to a transaction.

   $START_BRANCHW always waits for the request to complete before
   returning to the caller. Other than this, it is identical to
   $START_BRANCH.

   Format

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

                        ,tid ,tm_name ,bid [,[timout] ,[acmode],

                        [tx_class]]

   C Prototype

     int sys$start_branchw  (unsigned int efn, unsigned int

                            flags, struct _iosb *iosb, void

                            (*astadr)(__unknown_params), int astprm,

                            unsigned int tid [4], void *tm_name,

                            unsigned int bid [4],...);