msfs-popout-panel-manager/WpfApp/OnScreenMessageDialog.xaml

<mah:MetroWindow x:Class="MSFSPopoutPanelManager.WpfApp.OnScreenMessageDialog"
        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:mah="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
        xmlns:local="clr-namespace:MSFSPopoutPanelManager.WpfApp"
        mc:Ignorable="d"
        Height="Auto" 
        Width="Auto"
        SizeToContent="WidthAndHeight"
        Title="MSFS Pop Out Panel Manager"
        WindowStartupLocation="CenterOwner"
        Opacity="0.7"
        ResizeMode="NoResize"
        WindowStyle="None">
    <Grid>
        <DockPanel>
            <WrapPanel DockPanel.Dock="Top" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="30,25,30,25" Height="75">
                <Image Width="40" Height="40" HorizontalAlignment="Left">
                    <Image.Style>
                        <Style TargetType="Image">
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding Path=MessageIcon, Mode=OneWay}" Value="{x:Static local:MessageIcon.Success}">
                                    <Setter Property="Source" Value="Resources/check.png"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Path=MessageIcon, Mode=OneWay}" Value="{x:Static local:MessageIcon.Failed}">
                                    <Setter Property="Source" Value="Resources/cross.png"/>
                                </DataTrigger>
                                <DataTrigger Binding="{Binding Path=MessageIcon, Mode=OneWay}" Value="{x:Static local:MessageIcon.Info}">
                                    <Setter Property="Source" Value="Resources/info.png"/>
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>
                    </Image.Style>
                </Image>
                <Grid Height="75" VerticalAlignment="Center" Margin="10, 0, 0, 0" Width="Auto">
                    <TextBlock Name="txtMessage" Width="Auto" Text="Message" HorizontalAlignment="Center" VerticalAlignment="Center" TextWrapping="Wrap"/>
                </Grid>
            </WrapPanel>
        </DockPanel>
    </Grid>
</mah:MetroWindow>