jellyfin/MediaBrowser.UI/HiddenWindow.xaml

<Window x:Class="MediaBrowser.UI.HiddenWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Media Browser Theater" 
        WindowStartupLocation="Manual" ResizeMode="NoResize" WindowStyle="None" BorderThickness="1" Background="Black">
    <Grid x:Name="MainGrid">
        <my:WindowsFormsHost Name="WindowsFormsHost" xmlns:my="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration" />
    </Grid>
</Window>