USID event_stream_create_stream_pair (void* inhandle, void* outhandle,
Lisp_Object* instream, Lisp_Object* outstream, int flags);
USID event_stream_delete_stream_pair (Lisp_Object instream, Lisp_Object outstream);
USID event_stream_create_stream_pair (void* inhandle, void* outhandle,
Lisp_Object* instream, Lisp_Object* outstream, int flags);
USID event_stream_delete_stream_pair (Lisp_Object instream, Lisp_Object outstream);