+#if DBUS_VERSION <= 33
+ call = dbus_g_proxy_begin_call (remote_object, "OpenWindow", DBUS_TYPE_INVALID);
+
+ if (!dbus_g_proxy_end_call (remote_object, call, &error, DBUS_TYPE_INVALID)) {
+ g_warning (error->message);
+ g_clear_error (&error);
+ return FALSE;
+ }
+#elif DBUS_VERSION == 34