Index: uspace/lib/ui/include/types/ui/window.h
===================================================================
--- uspace/lib/ui/include/types/ui/window.h	(revision 6baab83ddb6d4e0ab2dc838329e4cf738b3f0d38)
+++ uspace/lib/ui/include/types/ui/window.h	(revision 1bebc9068cc17a7b97d059f342fc64f90c7b2627)
@@ -63,4 +63,10 @@
 } ui_wnd_placement_t;
 
+/** Window flags */
+typedef enum {
+	/** Popup window */
+	ui_wndf_popup = 0x1
+} ui_wnd_flags_t;
+
 /** Window parameters */
 typedef struct {
@@ -73,4 +79,6 @@
 	/** Window placement */
 	ui_wnd_placement_t placement;
+	/** Window flags */
+	ui_wnd_flags_t flags;
 	/** Parent rectangle for popup windows */
 	gfx_rect_t prect;
Index: uspace/lib/ui/include/ui/window.h
===================================================================
--- uspace/lib/ui/include/ui/window.h	(revision 6baab83ddb6d4e0ab2dc838329e4cf738b3f0d38)
+++ uspace/lib/ui/include/ui/window.h	(revision 1bebc9068cc17a7b97d059f342fc64f90c7b2627)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2020 Jiri Svoboda
+ * Copyright (c) 2021 Jiri Svoboda
  * All rights reserved.
  *