LauncherWindow.xml

<Window
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit" 
  xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  x:Name="window" mc:Ignorable="d" x:Class="Launcher.MainWindow"
    Title="MainWindow" 
    Height="520" Width="420"
    WindowStyle="None" ResizeMode="NoResize" 
    Background ="Transparent" AllowsTransparency="True" 
    SnapsToDevicePixels="True">
        
  <Window.Resources>
    <SolidColorBrush x:Key="TextBox.Static.Border" Color="#FFABAdB3"/>
    <SolidColorBrush x:Key="TextBox.MouseOver.Border" Color="#FF7EB4EA"/>
    <SolidColorBrush x:Key="TextBox.Focus.Border" Color="#FF569DE5"/>
    <BooleanToVisibilityConverter x:Key="BoolToVis" />
  </Window.Resources>
	
  <!-- Actual visible area of the window -->
  <Border x:Name="wrapper" Margin="10" BorderThickness="1" BorderBrush="#FF838383">
    <!-- Shadow around the window -->
    <Border.Effect>
      <DropShadowEffect ShadowDepth="0" Color="Black" BlurRadius="15"/>
    </Border.Effect>
		
    <!-- Main grid container -->
    <Grid x:Name="mainGrid" Background="White">
      <Grid.RowDefinitions>
        <RowDefinition Height="50"/>
        <RowDefinition/>
        <RowDefinition Height="50"/>
      </Grid.RowDefinitions>

      <!-- Firsr row (search icon, search text, menu button) -->
      <Border x:Name="headerWrapper" Grid.Row="0" BorderThickness="0, 0, 0, 1" BorderBrush="#E5E5E5">
        <Grid x:Name="headerGrid" Margin="0">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="50"/>
            <ColumnDefinition Width="17*"/>
            <ColumnDefinition Width="50"/>
          </Grid.ColumnDefinitions>
          
          <!-- Search Textbox -->
          <Grid x:Name="searchBarGrid" Grid.Column="1" Margin="0" VerticalAlignment="Center">
            <!-- This TextBlock is the watermark behind the textbox -->
            <TextBlock TextWrapping="Wrap" VerticalAlignment="Center" Text="Search"
              Foreground="#FF828282" FontSize="16" FontFamily="Segoe UI Semilight"
              Margin="2,2" Visibility="{Binding Text.IsEmpty, Converter={StaticResource BoolToVis}, ElementName=SearchBox}"/>
            <TextBox x:Name="SearchBox" TextWrapping="Wrap" Margin="0" VerticalAlignment="Center" 
              FontSize="16" FontFamily="Segoe UI Semilight" Background="{x:Null}" 
              BorderBrush="{x:Null}" BorderThickness="0"/>
          </Grid>
          
          <!-- Menu Button, icon inside is painted using 3 rectangles -->
          <!-- Style is in the App.xaml -->
          <Button x:Name="menuButton" Grid.Column="2" Margin="0" Width="25" Height="25" 
            Style="{DynamicResource BorderlessFadeInButton}" Background="{x:Null}" BorderBrush="{x:Null}">
            <Grid>
              <Rectangle Fill="Black" HorizontalAlignment="Center" Height="4" 
                Margin="0,0,0,12" VerticalAlignment="Center" Width="20" StrokeThickness="0"/>
              <Rectangle Fill="Black" HorizontalAlignment="Center" Height="4" 
                Margin="0" VerticalAlignment="Center" Width="20" StrokeThickness="0"/>
              <Rectangle Fill="Black" HorizontalAlignment="Center" Height="4" 
                Margin="0,12,0,0" VerticalAlignment="Center" Width="20" StrokeThickness="0"/>
            </Grid>
          </Button>

          <!-- Search icon, not an image, painted in XAML instead -->
          <Ellipse HorizontalAlignment="Left" Height="13.416" Margin="21.083,15.917,0,0" 
            StrokeThickness="2" VerticalAlignment="Top" Width="13.167" Stroke="#FF838383"/>
          <Rectangle HorizontalAlignment="Left" Height="3.446" Margin="15.779,27.897,0,0" 
            StrokeThickness="2" VerticalAlignment="Top" Width="10.016" Fill="#FF838383" RenderTransformOrigin="0.5,0.5" RadiusX="2" RadiusY="2">
            <Rectangle.RenderTransform>
              <TransformGroup>
                <ScaleTransform/>
                <SkewTransform/>
                <RotateTransform Angle="-45.368"/>
                <TranslateTransform/>
              </TransformGroup>
            </Rectangle.RenderTransform>
          </Rectangle>
        </Grid>
                
      </Border>
    </Grid>
  </Border>
</Window>