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Transparent Window

<Window x: Class="Windows.ModernWindow"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="ModernWindow" Height="300" Width="300"         AllowsTransparency="True" Background="Transparent"         WindowStyle="None" ResizeMode="CanResizeWithGrip">    <Border Width="Auto" Height="Auto" Name="windowFrame"           BorderBrush="#395984"           BorderThickness="1"           CornerRadius="0,20,30,40" >     <Border.Background>       <LinearGradientBrush >         <GradientBrush.GradientStops>           <GradientStopCollection>             <GradientStop Color="#E7EBF7" Offset="0.0"/>             <GradientStop Color="#CEE3FF" Offset="0.5"/>              </GradientStopCollection>         </GradientBrush.GradientStops>       </LinearGradientBrush>     </Border.Background>     <StackPanel>       <TextBlock Text="Title Bar" Margin="1" Padding="5" MouseLeftButtonDown="titleBar_MouseLeftButtonDown"></TextBlock>       <Button Click="cmdClose_Click">Close</Button>       <Rectangle Cursor="SizeWE"                   MouseLeftButtonDown="window_initiateWiden"                  MouseLeftButtonUp="window_endWiden"                  MouseMove="window_Widen"/>       </StackPanel>        </Border> </Window> //File:Window.xaml.vb Imports System Imports System.Collections.Generic Imports System.Text Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Data Imports System.Windows.Documents Imports System.Windows.Input Imports System.Windows.Media Imports System.Windows.Media.Imaging Imports System.Windows.Shapes Namespace Windows   Public Partial Class ModernWindow     Inherits System.Windows.Window     Public Sub New()       InitializeComponent()     End Sub     Private isWiden As Boolean = False     Private Sub window_initiateWiden(sender As Object, e As System.Windows.Input.MouseEventArgs)       isWiden = True     End Sub     Private Sub window_endWiden(sender As Object, e As System.Windows.Input.MouseEventArgs)       isWiden = False       Dim rect As Rectangle = DirectCast(sender, Rectangle)       rect.ReleaseMouseCapture()     End Sub     Private Sub window_Widen(sender As Object, e As System.Windows.Input.MouseEventArgs)       Dim rect As Rectangle = DirectCast(sender, Rectangle)       If isWiden Then         rect.CaptureMouse()         Dim newWidth As Double = e.GetPosition(Me).X + 5         If newWidth > 0 Then           Me.Width = newWidth         End If       End If     End Sub     Private Sub titleBar_MouseLeftButtonDown(sender As Object, e As MouseButtonEventArgs)       Me.DragMove()     End Sub     Private Sub cmdClose_Click(sender As Object, e As RoutedEventArgs)       Me.Close()     End Sub   End Class End Namespace