The following figure shows subcategories for invokable TPs.
The concept of a TP "running as a service" or "running as an application" is distinct from a service TP or an application TP. Service TP and application TP are SNA terms that describe how a TP is used: either as a supportive service program for other APPC programs, or directly by a user, as an application. For detailed information about Windows NT-based services and applications, see the documentation for Windows NT and for Win32®.
To write an autostarted TP so it will run under Windows NT as a service and also run in a nonqueued way, write a multithreaded program with a RECEIVE_ALLOCATE always outstanding. See Invokable TPs.
To run an autostarted TP as an application under Windows NT, make sure the TPSTART program is always started before the TP. See Sample APPC TPs in the SDK.