Windows Desktop Runtime 8.0 11 !!link!! -

using System; using System.Runtime.InteropServices; using System.Windows; using System.Windows.Media; namespace Win11AcrylicFeature { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); SourceInitialized += (s, e) => Win11ThemeHelper.ApplyDarkTitleBar(this); Loaded += (s, e) => ApplyAcrylicIfSupported(); }

[DllImport("dwmapi.dll")] private static extern int DwmSetWindowAttribute(IntPtr hwnd, int attr, ref bool value, int size); windows desktop runtime 8.0 11

private void ToggleAcrylic(object sender, RoutedEventArgs e) { if (AcrylicToggle.IsChecked == true) Background = new SolidColorBrush(Color.FromArgb(200, 0, 0, 0)); else Background = new SolidColorBrush(Colors.White); } using System; using System

private static bool IsSystemDarkMode() { try { using var key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize"); return key?.GetValue("AppsUseLightTheme") is int val && val == 0; } catch { return false; } } } MainWindow.xaml SourceInitialized += (s

<Window x:Class="Win11AcrylicFeature.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" Title="Windows 11 Acrylic Demo" Height="450" Width="600" Background="Transparent" AllowsTransparency="True" WindowStyle="None"> <Grid> <Border x:Name="AcrylicBorder" Background="White" Opacity="0.85"> <Border.Background> <SolidColorBrush Color="#CCFFFFFF"/> </Border.Background> </Border> <StackPanel Margin="20"> <CheckBox x:Name="AcrylicToggle" Content="Enable Acrylic (Windows 11)" Checked="ToggleAcrylic" Unchecked="ToggleAcrylic"/> <TextBlock Text="This window uses dark mode title bar and optional acrylic blur." TextWrapping="Wrap" Margin="0,20"/> </StackPanel> </Grid> </Window>

It sounds like you want to develop a feature for an app that runs on using .NET 8.0 (the runtime version) and is intended for Windows 11 (or Windows 10/11 with modern APIs).