Index: /trunk/include/VBox/GuestHost/GuestControl.h
===================================================================
--- /trunk/include/VBox/GuestHost/GuestControl.h	(revision 105875)
+++ /trunk/include/VBox/GuestHost/GuestControl.h	(revision 105876)
@@ -539,4 +539,6 @@
 /**
  * Filter option for HOST_MSG_DIR_OPEN.
+ *
+ * @note Currently *must* match RTDIRFILTER, so be careful when changing this!
  */
 typedef enum GSTCTLDIRFILTER