-/* Toggle display of a window "win". */
-extern void toggle_window(struct WinMeta * win_meta, struct Win * win);
+/* Toggle display of a window "win".
+ *
+ * Return 0 on success, 1 on (ncurses pad/window memory allocation) error.
+ */
+extern uint8_t toggle_window(struct WinMeta * win_meta, struct Win * win);
/* Try to grow or shrink the active window horizontally ("change" = "*"/"_") or
* vertically ("change = "+"/"-") by one cell size, subject to the limitations
* provided by the window manager via resize_active_win().
+ *
+ * Return 0 on success, 1 on (ncurses pad/window memory allocation) error.
*/
-extern void growshrink_active_window(struct WinMeta * win_meta, char change);
+extern uint8_t growshrink_active_window(struct WinMeta * win_meta, char change);