ZeroTierOne/windows/WinUI/MainWindow.xaml

<Window
        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:WinUI"
        mc:Ignorable="d" x:Class="WinUI.MainWindow"
        Title="ZeroTier One" Height="495" Width="705" Icon="ZeroTierIcon.ico">
	
	<Window.Resources>
		<ResourceDictionary>
			<Style TargetType="{x:Type TabItem}">
				<Setter Property="BorderThickness"
						Value="3" />
				<Setter Property="BorderBrush"
						Value="Blue" />
				<Setter Property="VerticalContentAlignment"
						Value="Center" />
				<Setter Property="HorizontalContentAlignment"
						Value="Center" />
				<Setter Property="Template">
					<Setter.Value>
						<ControlTemplate TargetType="{x:Type TabItem}">
							<Border>
								<Grid>
									<Grid>
										<Border x:Name="border" 
												CornerRadius="3,3,0,0"
												Background="{TemplateBinding Background}"
												BorderBrush="{TemplateBinding BorderBrush}"
												BorderThickness="1,1,1,0" />
									</Grid>
									<Border BorderThickness="{TemplateBinding BorderThickness}"
											Padding="{TemplateBinding Padding}">
										<ContentPresenter ContentSource="Header"
														  HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
														  VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
									</Border>
								</Grid>
							</Border>
							<ControlTemplate.Triggers>
								<Trigger Property="IsSelected"
										 Value="True">
									<Setter TargetName="border"
											Property="BorderBrush"
												Value="#ff91a2a3" />
									<Setter TargetName="border"
											Property="BorderThickness"
											Value="0,3,0,0" />
								</Trigger>
							</ControlTemplate.Triggers>
						</ControlTemplate>
					</Setter.Value>
				</Setter>
			</Style>
		</ResourceDictionary>
	</Window.Resources>

	<DockPanel>
		<StatusBar DockPanel.Dock="Bottom" Height="34" Background="#FF234447" Margin="0">
			<StatusBar.ItemsPanel>
                <ItemsPanelTemplate>
                    <Grid>
                        <Grid.RowDefinitions>
                            <RowDefinition Height="*"/>
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
							<ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="Auto"/>
							<ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                    </Grid>
                </ItemsPanelTemplate>
            </StatusBar.ItemsPanel>
			<StatusBarItem Grid.Column="0" x:Name="networkId" Content="Network ID" Foreground="White"/>
			<StatusBarItem Grid.Column="1" x:Name="onlineStatus" Content="ONLINE" Foreground="White"/>
			<StatusBarItem Grid.Column="2" x:Name="versionString" Content="1.0.5" Foreground="White" Margin="0"/>
			<StatusBarItem Grid.Column="3" x:Name="blank" Content="" Height="43" Foreground="White" Margin="6,0,-6,-9"/>
			<StatusBarItem Grid.Column="4">
				<TextBox x:Name="joinNetworkID" Height="23" TextWrapping="Wrap" Width="120" HorizontalAlignment="Right" RenderTransformOrigin="1.168,0.478" ToolTip="Enter Network ID" PreviewTextInput="OnNetworkEntered" MaxLength="16"/>
			</StatusBarItem>
			<StatusBarItem Grid.Column="5" x:Name="statusBarButton" Foreground="White" RenderTransformOrigin="0.789,0.442">
				<Button x:Name="joinButton" Content="Join" Background="#FFFFB354" Width="77.423" Click="joinButton_Click"/>
			</StatusBarItem>
		</StatusBar>
		<TabControl>
            <TabItem x:Name="Networks" Header="Networks" Background="#FF234447" Foreground="White" IsSelected="True" IsManipulationEnabled="True">
                <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <local:NetworksPage x:Name="networksPage" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Column="0" Grid.Row="0" Margin="0,0,0,0"/>
                </Grid>
            </TabItem>
            <TabItem x:Name="Peers" Header="Peers" Background="#FF234447" Foreground="White">
                <Grid Background="#FFE5E5E5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                    <local:PeersPage x:Name="peersPage" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"></local:PeersPage>
                </Grid>
            </TabItem>
		</TabControl>
	</DockPanel>
</Window>