diff --git a/examples/Win32Demo/widget.cpp b/examples/Win32Demo/widget.cpp
index 2f0ce70..12ac833 100644
--- a/examples/Win32Demo/widget.cpp
+++ b/examples/Win32Demo/widget.cpp
@@ -42,7 +42,9 @@ void updateWindow(QWidget *widget)
 {
     Q_ASSERT(widget);
     if (widget->isTopLevel()) {
-        WinNativeEventFilter::updateWindow(getRawHandle(widget), true, true);
+        void *handle = getRawHandle(widget);
+        WinNativeEventFilter::updateFrameMargins(handle);
+        WinNativeEventFilter::updateWindow(handle, true, true);
     }
 }
 
diff --git a/winnativeeventfilter.h b/winnativeeventfilter.h
index 99743f7..537f16a 100644
--- a/winnativeeventfilter.h
+++ b/winnativeeventfilter.h
@@ -143,7 +143,7 @@ public:
     // On Win10 it's the Acrylic effect.
     static bool setBlurEffectEnabled(void *handle /* HWND */, const bool enabled = true);
 
-    // a
+    // Thin wrapper of DwmExtendFrameIntoClientArea().
     static void updateFrameMargins(void *handle /* HWND */);
 
     ///////////////////////////////////////////////