Index: uspace/lib/wndmgt/include/types/wndmgt.h
===================================================================
--- uspace/lib/wndmgt/include/types/wndmgt.h	(revision 7a05d92432149535737f64b23841348ad9053a0c)
+++ uspace/lib/wndmgt/include/types/wndmgt.h	(revision f1f433d10ab8dfdc792a9cdc8807b76dbcfac663)
@@ -53,4 +53,6 @@
 	/** Window removed */
 	void (*window_removed)(void *, sysarg_t);
+	/** Window changed */
+	void (*window_changed)(void *, sysarg_t);
 } wndmgt_cb_t;
 
@@ -60,5 +62,7 @@
 	wmev_window_added,
 	/** Window removed */
-	wmev_window_removed
+	wmev_window_removed,
+	/** Window changed */
+	wmev_window_changed
 } wndmgt_ev_type_t;