+#ifdef __cplusplus
+extern DECLSPEC int cec_set_hdmi_port(CEC::cec_logical_address iBaseDevice, uint8_t iPort);
+#else
+extern DECLSPEC int cec_set_hdmi_port(cec_logical_address iBaseDevice, uint8_t iPort);
+#endif
+
+extern DECLSPEC int cec_volume_up(int bSendRelease);
+
+extern DECLSPEC int cec_volume_down(int bSendRelease);
+
+extern DECLSPEC int cec_mute_audio(int bSendRelease);
+
+#ifdef __cplusplus
+extern DECLSPEC int cec_send_keypress(CEC::cec_logical_address iDestination, CEC::cec_user_control_code key, int bWait);
+#else
+extern DECLSPEC int cec_send_keypress(cec_logical_address iDestination, cec_user_control_code key, int bWait);
+#endif