1 files changed, 7 insertions, 4 deletions

diff --git a/src/menu.c b/src/menu.c
index b75e3dd6219..552ce1f2818 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -1434,7 +1434,7 @@ no quit occurs and `x-popup-menu' returns nil.  */)
   return selection;
 }
 
-/* If F's terminal is not capable to display popup dialog,
+/* If F's terminal is not capable of displaying a popup dialog,
    emulate it with a menu.  */
 
 static Lisp_Object
@@ -1457,7 +1457,7 @@ emulate_dialog_with_menu (struct frame *f, Lisp_Object contents)
         x_coord -= SCHARS (prompt);
       y_coord = FRAME_LINES (f);
     }
-  
+
   XSETFRAME (frame, f);
   XSETINT (x, x_coord / 2);
   XSETINT (y, y_coord / 2);
@@ -1546,9 +1546,12 @@ for instance using the window manager, then this produces a quit and
       Lisp_Object selection
         = FRAME_TERMINAL (f)->popup_dialog_hook (f, header, contents);
 #ifdef HAVE_NTGUI
+      /* NTGUI supports only simple dialogs with Yes/No choices.  For
+         other dialogs, it returns the symbol 'unsupported--w32-dialog',
+         as a signal for the caller to fall back to the emulation code.  */
       if (!EQ (selection, Qunsupported__w32_dialog))
-#endif  
-      return selection;
+#endif
+        return selection;
     }
   /* ... or emulate it with a menu.  */
   return emulate_dialog_with_menu (f, contents);