diff -r 4a258d47f964 -r b1ac0dd1d38b ui/winui/MainWindow.xaml.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/winui/MainWindow.xaml.cpp	Tue Oct 10 10:58:14 2023 +0200
@@ -0,0 +1,37 @@
+// Copyright (c) Microsoft Corporation and Contributors.
+// Licensed under the MIT License.
+
+#include "pch.h"
+#include "MainWindow.xaml.h"
+#if __has_include("MainWindow.g.cpp")
+#include "MainWindow.g.cpp"
+#endif
+
+using namespace winrt;
+using namespace Microsoft::UI::Xaml;
+
+// To learn more about WinUI, the WinUI project structure,
+// and more about our project templates, see: http://aka.ms/winui-project-info.
+
+namespace winrt::winui::implementation
+{
+    MainWindow::MainWindow()
+    {
+        InitializeComponent();
+    }
+
+    int32_t MainWindow::MyProperty()
+    {
+        throw hresult_not_implemented();
+    }
+
+    void MainWindow::MyProperty(int32_t /* value */)
+    {
+        throw hresult_not_implemented();
+    }
+
+    void MainWindow::myButton_Click(IInspectable const&, RoutedEventArgs const&)
+    {
+        myButton().Content(box_value(L"Clicked"));
+    }
+}