PowerToys/tools/FancyZonesEditor_DPI_netcore_test/OverlayWindow.xaml

<Window x:Class="FancyZonesEditor_DPI_netcore_test.OverlayWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FancyZonesEditor_DPI_netcore_test"
        mc:Ignorable="d"
        Title="OverlayWindow" Height="450" Width="800"
        ShowInTaskbar="False"
        ResizeMode="NoResize"
        WindowStyle="None"
        AllowsTransparency="True"
        Background="Transparent">
</Window>