The Produce a Unique Name routine returns an application-unique
    name. A system-unique string specific to the calling application
    is appended to the string specified by the user. The resulting
    name is identical for all participants in the application, but
    different from those for all other applications on that system.

    Format

      PPL$UNIQUE_NAME  name-string ,resultant-string

                       [,resultant-length] [,flags]