MainWindow.xaml

<?xml version="1.0" encoding="utf-8" ?>
<winex:WindowEx
    x:Class="WinExSpectrumTest.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:controls="using:WinExSpectrumTest.Control"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="using:WinExSpectrumTest"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:myCanvas="using:WinExSpectrumTest.Canvas"
    xmlns:winex="using:WinUIEx"
    Title="WinExSpectrumTest"
    Width="512"
    Height="512"
    MinWidth="384"
    MinHeight="384"
    mc:Ignorable="d">

    <winex:WindowEx.SystemBackdrop>
        <winex:TransparentTintBackdrop />
    </winex:WindowEx.SystemBackdrop>

    <Grid x:Name="MyMainwindow" PointerEntered="MyMainwindow_PointerEntered" PointerExited="MyMainwindow_PointerExited">
        <controls:NotifyIconControl x:Name="AppNotifyIconControl" MinWidth="0" />
        <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Canvas.ZIndex="1">
            <myCanvas:CanvasPanel x:Name="MyCanvas" />
        </Grid>
        <Grid
            x:Name="TopCommand"
            Margin="5,0,0,0"
            VerticalAlignment="Top"
            Canvas.ZIndex="999"
            PointerEntered="TopCommand_PointerEntered"
            PointerExited="TopCommand_PointerExited">
            <Grid.OpacityTransition>
                <ScalarTransition />
            </Grid.OpacityTransition>
            <Button Click="Button_Click">
                <FontIcon FontSize="16" Glyph="&#xE72E;" />
            </Button>
        </Grid>
    </Grid>
</winex:WindowEx>