Sungaila.ImmersiveDarkMode

Applies a dark theme to the titlebar of Win32 windows. Can also be toggled automatically whenever the system-wide application theme changes.

Works on Windows 11 (Build 22000) and newer.

Windows Forms

Add the following NuGet package: Sungaila.ImmersiveDarkMode.WinForms

Call WindowExtensions.SetTitlebarTheme() in the constructor of your System.Windows.Forms.Form and override WndProc like this:

public Form1()
{
    InitializeComponent();
    this.SetTitlebarTheme();
}

protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);
    WindowExtensions.CheckAppsThemeChanged(m);
}

Windows UI Library 3

Add the following NuGet package: Sungaila.ImmersiveDarkMode.WinUI

Call WindowExtensions.InitTitlebarTheme() in the constructor of your Microsoft.UI.Xaml.Window like this:

public Window1()
{
    InitializeComponent();
    this.InitTitlebarTheme();
}

Windows Presentation Foundation

Add the following NuGet package: Sungaila.ImmersiveDarkMode.Wpf

Call WindowExtensions.InitTitlebarTheme() in the constructor of your System.Windows.Window like this:

public Window1()
{
    InitializeComponent();
    this.InitTitlebarTheme();
}