MainWindow.xaml

<Window x:Class="AirControl.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="AirControl v1.1"
        Height="600"
        Width="800"
        WindowState="Maximized">
    <Viewbox Stretch="Uniform">
        <Grid>
            <Image Name="videoImage"
                   Width="640"
                   Height="480"></Image>
            <Canvas Background="Transparent">
                <Ellipse Fill="Red"
                         Height="20"
                         Width="20"
                         Name="ellipseLeftHand"
                         Stroke="White"
                         Canvas.Top="230"
                         Canvas.Left="310"/>
                <Ellipse Fill="Red"
                         Height="20"
                         Width="20"
                         Name="ellipseRightHand"
                         Stroke="White"
                         Canvas.Top="230"
                         Canvas.Left="310"/>
                <Ellipse Fill="Red"
                         Height="20"
                         Width="20"
                         Name="ellipseHead"
                         Stroke="White" 
                         Canvas.Top="230"
                         Canvas.Left="310"/>
            </Canvas>
        </Grid>
    </Viewbox>
</Window>