+#ifdef __cplusplus
+extern DECLSPEC uint16_t cec_get_device_physical_address(CEC::cec_logical_address iLogicalAddress);
+#else
+extern DECLSPEC uint16_t cec_get_device_physical_address(cec_logical_address iLogicalAddress);
+#endif
+
+#ifdef __cplusplus
+extern DECLSPEC CEC::cec_logical_address cec_get_active_source(void);
+#else
+extern DECLSPEC cec_logical_address cec_get_active_source(void);
+#endif
+
+#ifdef __cplusplus
+extern DECLSPEC int cec_is_active_source(CEC::cec_logical_address iAddress);
+#else
+extern DECLSPEC int cec_is_active_source(cec_logical_address iAddress);
+#endif
+