The Set Distributed Transaction Information service removes
    resource managers from transactions. It can also be used to
    modify transaction states.

    Format

      SYS$SETDTI  [efn], [flags], iosb, [astadr], [astprm], [contxt],

                  func, itmlst

    C Prototype

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

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

                      int astprm, unsigned int *contxt, unsigned

                      short int *func, void *itmlst);