+safe_ptr<class draw_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int flags);\r
+\r
+typedef std::function<safe_ptr<core::frame_producer>(const safe_ptr<struct frame_factory>&, const std::vector<std::wstring>&)> producer_factory_t;\r
+void register_producer_factory(const producer_factory_t& factory); // Not thread-safe.\r
+safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>&, const std::vector<std::wstring>& params);\r
+safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>&, const std::wstring& params);\r
+safe_ptr<core::frame_producer> create_producer_destroy_proxy(safe_ptr<core::frame_producer> producer);\r
+safe_ptr<core::frame_producer> create_producer_print_proxy(safe_ptr<core::frame_producer> producer);\r
+ \r
+}}\r