Stwhi main/updating code (#3800)

* updating code

* tidying up code

* tidying up code 2

* tidying up code 3

Author: stevewhims

hub/apps/design/shell/tiles-and-notifications/secondary-tiles-desktop-pinning.md

@@ -144,8 +144,7 @@ If you're using WPF or WinForms, and you haven't packaged your app with the Desk
 1. Retrieve a window handle, and initialize the secondary tile object with that handle. In the code below, `this` is a pointer to a [WinUI 3 Window](/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.window) object. For more info, see [Retrieve a window handle (HWND)](../../../develop/ui-input/retrieve-hwnd.md) and [Display WinRT UI objects that depend on CoreWindow](../../../develop/ui-input/display-ui-objects.md).
 
     ```cppwinrt
-    auto windowNative{ this->try_as<::IWindowNative>() };
-    winrt::check_bool(windowNative);
+    auto windowNative{ this->m_inner.as<::IWindowNative>() };
     HWND hWnd{ 0 };
     windowNative->get_WindowHandle(&hWnd);
 

hub/apps/develop/ui-input/display-ui-objects.md

@@ -174,8 +174,7 @@ public sealed partial class MainWindow : Window
 void MainWindow::myButton_Click(IInspectable const&, RoutedEventArgs const&)
 {
     // Retrieve the window handle (HWND) of the current WinUI 3 window.
-    auto windowNative{ this->try_as<::IWindowNative>() };
-    winrt::check_bool(windowNative);
+    auto windowNative{ this->m_inner.as<::IWindowNative>() };
     HWND hWnd{ 0 };
     windowNative->get_WindowHandle(&hWnd);
 

hub/apps/develop/ui-input/retrieve-hwnd.md

@@ -43,8 +43,7 @@ The C++/WinRT code below shows how to retrieve the window handle (HWND) for a Wi
 void MainWindow::myButton_Click(IInspectable const&, RoutedEventArgs const&)
 {
     // Retrieve the window handle (HWND) of the current WinUI 3 window.
-    auto windowNative{ this->try_as<::IWindowNative>() };
-    winrt::check_bool(windowNative);
+    auto windowNative{ this->m_inner.as<::IWindowNative>() };
     HWND hWnd{ 0 };
     windowNative->get_WindowHandle(&hWnd);
 }

hub/apps/windows-app-sdk/migrate-to-windows-app-sdk/guides/winui3.md

@@ -133,8 +133,9 @@ await showDialog.ShowAsync();
 ...
 auto showDialog{ Windows::UI::Popups::MessageDialog(L"Message here") };
 
+auto windowNative{ this->m_inner.as<::IWindowNative>() };
 HWND hWnd{ 0 };
-this->try_as<::IWindowNative>()->get_WindowHandle(&hWnd);
+windowNative->get_WindowHandle(&hWnd);
 showDialog.as<::IInitializeWithWindow>()->Initialize(hWnd);
 
 co_await showDialog.ShowAsync();

hub/apps/windows-app-sdk/system-backdrop-controller.md

@@ -422,7 +422,7 @@ struct MainWindow : MainWindowT<MainWindow>
             m_backdropController = winrt::MUCSB::MicaController();
             m_backdropController.SetSystemBackdropConfiguration(m_configuration);
             m_backdropController.AddSystemBackdropTarget(
-                this->try_as<winrt::MUC::ICompositionSupportsSystemBackdrop>());
+                this->m_inner.as<winrt::MUC::ICompositionSupportsSystemBackdrop>());
         }
         else
         {

hub/apps/windows-app-sdk/windowing/windowing-overview.md

@@ -119,8 +119,7 @@ private void myButton_Click(object sender, RoutedEventArgs e)
 void MainWindow::myButton_Click(IInspectable const&, RoutedEventArgs const&)
 {
     // Retrieve the window handle (HWND) of the current (XAML) WinUI 3 window.
-    auto windowNative{ this->try_as<::IWindowNative>() };
-    winrt::check_bool(windowNative);
+    auto windowNative{ this->m_inner.as<::IWindowNative>() };
     HWND hWnd{ 0 };
     windowNative->get_WindowHandle(&hWnd);