Wpf screen edge swipe detect - wpf

Question

I have a basic wpf app that basically detects a touch input and moves a rectangle according to the input. My problem is that if that touch comes outside the screen(For example: I touch the bottom bezel of the screen and slide it in the touch area) it won't be detected. Is there a way to get over this problem? I want to detect edge swipes as well.
XAML:
<Window x:Class="touch_test.MainWindow"
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:touch_test"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800"
Stylus.IsPressAndHoldEnabled="False"
>
<Canvas>
<Rectangle Width="50" Height="50" x:Name="rect" Fill="Red"/>
</Canvas>
</Window>
Cs:
protected TouchPoint TouchStart;
public MainWindow()
{
InitializeComponent();
this.PreviewTouchDown += new EventHandler<TouchEventArgs>(BasePage_TouchDown);
this.PreviewTouchMove += new EventHandler<TouchEventArgs>(BasePage_TouchMove);
WindowState = WindowState.Maximized;
WindowStyle = WindowStyle.None;
}
void BasePage_TouchDown(object sender, TouchEventArgs e)
{
TouchStart = e.GetTouchPoint(this);
}
void BasePage_TouchMove(object sender, TouchEventArgs e)
{
Rectangle rectToMove = rect;
rectToMove.RenderTransform = new MatrixTransform();
Matrix matr = ((MatrixTransform)rectToMove.RenderTransform).Matrix;
var currentTouchPoint = e.GetTouchPoint(this);
matr.Translate(currentTouchPoint.Position.X, currentTouchPoint.Position.Y );
rectToMove.RenderTransform = new MatrixTransform(matr);
}