WPF

<Window x:Class="MainWindowView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:views="clr-namespace:Views"
        Title="Demo" 
        WindowStartupLocation="CenterScreen"
        Height="800" 
        Width="1000">

<pre>
<Grid>

    <TabControl Margin="5">

        <TabItem Header="Tab 1">
            <views:HostView HostContent="ContentControl_1.xaml"/>
        </TabItem>

        <TabItem Header="Tab 2">
            <views:HostView HostContent="ContentControl_2.xaml"/>
        </TabItem>

        <TabItem Header="Tab 3">
            <views:HostView HostContent="ContentControl_3.xaml"/>
        </TabItem>

    </TabControl>

</Grid>

<Window x:Class="KClock.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:KClock"
        WindowStyle="None"
        MouseDown="Window_MouseDown"
        AllowsTransparency="True"
        Background="Black"
        BorderBrush="Transparent"
        Height="300" 
        Width="500">

<pre>
<Grid>

    <TextBlock Text="4:40:25 pm"
               Foreground="Lime"
               FontSize="34">

        <TextBlock.Style>
            <Style>
                <Setter Property="TextBlock.FontSize" Value="36" />
                <Setter Property="TextElement.FontFamily" Value="Resources/DSEG14Modern-Bold" />
            </Style>
        </TextBlock.Style>

    </TextBlock>

</Grid>

public static class PrintLib
{
    // ======== DP'S
    public static DependencyProperty ExcludeFromReportProperty =
            DependencyProperty.RegisterAttached("ExcludeFromReport",
                                                typeof(bool),
                                                typeof(PrintLib),
                                                new PropertyMetadata(false));

<pre>
public static void SetExcludeFromReport(DependencyObject obj, bool value)
{
    obj.SetValue(ExcludeFromReportProperty, value);
}
public static bool GetExcludeFromReport(DependencyObject obj)
{
    return (bool)obj.GetValue(ExcludeFromReportProperty);
}

// ======== PUBLIC METHODS
public static void ViewImage(string filename)
{
    Process process = new Process();
    process.StartInfo.FileName = "rundll32.exe";
    process.StartInfo.Arguments = @"C:\WINDOWS\System32\shimgvw.dll, ImageView_Fullscreen " + filename;
    process.Start();
}

public static void GenerateReportFromControl(FrameworkElement element)
{
    PrepareReportElements(element);

    Rect rect = VisualTreeHelper.GetDescendantBounds(element);

    DrawingVisual dv = new DrawingVisual();

    using (DrawingContext ctx = dv.RenderOpen())
    {
        VisualBrush brush = new VisualBrush(element);
        ctx.DrawRectangle(brush, null, new Rect(rect.Size));
    }

    int width = (int)element.ActualWidth;
    int height = (int)element.ActualHeight;
    RenderTargetBitmap rtb = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
    rtb.Render(dv);

    PngBitmapEncoder encoder = new PngBitmapEncoder();
    encoder.Frames.Add(BitmapFrame.Create(rtb));

    string filename = @"C:\temp\ReportImage.jpg";
    using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.None))
    {
        encoder.Save(fs);
    }

    ViewImage(filename);
}

// ======== PRIVATE METHODS
private static void PrepareReportElements(FrameworkElement element, int level = 0)

<TabControl  x:Name="MyTabControl" ItemsSource="{Binding ViewModels}" Margin="4"
            Background="#DCE8F3"
            SelectedIndex="0"
            BorderBrush="LightGray"
            TabStripPlacement="Top">
    <TabControl.Resources>
        <DataTemplate DataType="{x:Type vm:SmartCardViewModel}">
            <view:SmartCardView/>
        </DataTemplate>
        <DataTemplate DataType="{x:Type vm:RfidLogFileViewModel}">
            <view:LogFileView/>
        </DataTemplate>
        <DataTemplate DataType="{x:Type vm:VideoLogFileViewModel}">
            <view:LogFileView/>
        </DataTemplate>
    </TabControl.Resources>
    <TabControl.ItemTemplate>
        <DataTemplate>
        <TextBlock Text="{Binding Name}"/>
        </DataTemplate>
    </TabControl.ItemTemplate>
</TabControl>

<UserControls:SQLFilterSettings DataContext="{Binding Path=Criteria}"/>

<ResourceDictionary Source="/Resources/UserControlResources.xaml" />

<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Name="themeGrid">
    <Image Height="Auto" HorizontalAlignment="Left" Margin="0" Stretch="Fill" VerticalAlignment="Top" Width="Auto">
        <Image.Source>
            <BitmapImage UriSource="pack://siteoforigin:,,,/Resources/image1.jpg" CacheOption="OnLoad" />
        </Image.Source>
    </Image>
</Grid>

Imports System.IO
Class MainWindow
    Private Sub MainWindow_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles Me.Loaded
        loadInterface()
    End Sub
    Sub loadInterface()
        ' Load xaml file as content of the window
        Dim GridUri As String = System.AppDomain.CurrentDomain.BaseDirectory & "Resources\theme.xaml"
        Dim fs As FileStream = New FileStream(GridUri, FileMode.Open, FileAccess.Read)
        Dim sri = TryCast(System.Windows.Markup.XamlReader.Load(fs), Grid)
        Me.Content = sri
        fs.Close()
    End Sub
End Class

<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Name="themeGrid">
    <Image Height="Auto" HorizontalAlignment="Left" Margin="0" Stretch="Fill" VerticalAlignment="Top" Width="Auto">
        <Image.Source>
            <BitmapImage UriSource="pack://siteoforigin:,,,/Resources/image1.jpg" CacheOption="OnLoad" />
        </Image.Source>
    </Image>
    <Label FontFamily="pack://siteoforigin:,,,/Resources/#Digital-7" Content="Have a nice day!"/>
</Grid>