tools/AasxPackageExplorer/sources/AasxWpfControlLibrary/MessageBoxFlyout.xaml

<UserControl x:Class="AasxPackageExplorer.MessageBoxFlyout"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:AasxWpfControlLibrary"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="900" Loaded="UserControl_Loaded">

<!-- Copyright (c) 2018-2019 Festo AG & Co. KG <https://www.festo.com/net/de_de/Forms/web/contact_international>, author: Michael Hoffmeister
This software is licensed under the Eclipse Public License - v 2.0 (EPL-2.0) (see https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt).
The browser functionality is under the cefSharp license (see https://raw.githubusercontent.com/cefsharp/CefSharp/master/LICENSE).
The JSON serialization is under the MIT license (see https://github.com/JamesNK/Newtonsoft.Json/blob/master/LICENSE.md). -->


    <UserControl.Resources>
        <ResourceDictionary Source="Themes/Generic.xaml"/>
    </UserControl.Resources>

    <Grid MaxHeight="400" MaxWidth="700">
              
        <Grid.RowDefinitions>
            <RowDefinition Height="1*" MinHeight="30"/>
            <RowDefinition Height="6*"/>
            <RowDefinition Height="1*"/>
            <RowDefinition Height="4*"/>
            <RowDefinition Height="2*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="1*"/>
            <ColumnDefinition Width="10*"/>
            <ColumnDefinition Width="1*"/>
            </Grid.ColumnDefinitions>

        <!--
        <Viewbox Grid.Row="0" Grid.Column="2" Margin="2" HorizontalAlignment="Right">
            <Border x:Name="BorderClose" CornerRadius="6" BorderBrush="White" BorderThickness="1" Margin="1" MouseDown="BorderClose_MouseDown">
                <Label Width="40" Height="40" Padding="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="22" Foreground="White">X</Label>
            </Border>
        </Viewbox>
        -->
        <Viewbox Grid.Row="0" Grid.Column="2" Margin="0,8,8,0" HorizontalAlignment="Right">
            <Button x:Name="ButtonClose" Style="{DynamicResource TranspRoundCorner}" Height="20" Width="20" Foreground="White" Click="ButtonClose_Click">X</Button>
        </Viewbox>

        <Grid Grid.Column="1" Grid.Row="1" VerticalAlignment="Center">

            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>

            <Viewbox Grid.Row="0" Grid.RowSpan="2" Grid.Column="0" Margin="0,0,20,0" Stretch="Fill" MaxHeight="80" VerticalAlignment="Center">
                <Image x:Name="ImageIcon" Height="80" Source="/AasxWpfControlLibrary;component/Resources/msg_error.png"/>
            </Viewbox>
            <TextBlock Grid.Row="0" Grid.Column="1" x:Name="TextBlockTitle" Margin="4" FontSize="24" Foreground="White" HorizontalAlignment="Center" TextWrapping="Wrap">Title</TextBlock>
            <TextBlock Grid.Row="1" Grid.Column="1" x:Name="TextBlockMessage" Margin="4" FontSize="18" Foreground="White" Background="#10ffffff" HorizontalAlignment="Stretch" TextWrapping="Wrap" TextAlignment="Center">very long message</TextBlock>
        </Grid>

        <Viewbox Grid.Column="1" Grid.Row="3">
            <StackPanel x:Name="StackPanelButtons"  Orientation="Horizontal">
                <!--
                <Border CornerRadius="3" BorderBrush="White" BorderThickness="1" Margin="1">
                    <Label Width="40" Height="40" Padding="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="22" Foreground="White">PE</Label>
                </Border>
                <Border CornerRadius="3" BorderBrush="White" BorderThickness="1" Margin="1">
                    <Border.Background>
                        <SolidColorBrush Color="#8888ff" Opacity="0.50"/>
                    </Border.Background>
                    <Label Width="40" Height="40" Padding="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="22" Foreground="White">A</Label>
                </Border>
                <Border CornerRadius="3" BorderBrush="White" BorderThickness="1" Margin="1">
                    <Border.Background>
                        <SolidColorBrush Color="#8888ff" Opacity="0.20"/>
                    </Border.Background>
                    <Label Width="40" Height="40" Padding="0" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="22" Foreground="White">XX</Label>
                </Border>
                -->

                <Button Style="{DynamicResource TranspRoundCorner}" Height="40" Width="40" Foreground="White" Margin="5,0,5,0">A</Button>
                <Button Style="{DynamicResource TranspRoundCorner}" Height="40" Width="40" Foreground="White" Margin="5,0,5,0">BB</Button>
                <Button Style="{DynamicResource TranspRoundCorner}" Height="40" Width="40" Foreground="White" Margin="5,0,5,0">CC</Button>
                <Button Style="{DynamicResource TranspRoundCorner}" Height="40" Width="40" Foreground="White" Margin="5,0,5,0">Hallo</Button>
            </StackPanel>
        </Viewbox>

        <Border Grid.RowSpan="5" Grid.ColumnSpan="3" BorderBrush="#606060" BorderThickness="1"/>
        
    </Grid>
</UserControl>