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Scrollable TextBox Column

<Window x:Class="Content.ScrollableTextBoxColumn"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="ScrollableTextBoxColumn" Height="181" Width="283" MinWidth="250">   <DockPanel>     <Border DockPanel.Dock="Top"  BorderBrush="SteelBlue" BorderThickness="2">     <StackPanel Margin="5" Orientation="Horizontal">       <Button Padding="3" Click="LineUp">Line Up</Button>       <Button Padding="3" Click="LineDown">Line Down</Button>       <Button Padding="3" Click="PageUp">Page Up</Button>       <Button Padding="3" Click="PageDown">Page Down</Button>     </StackPanel>   </Border>   <ScrollViewer Name="scroller">     <Grid Margin="0,10,0,0" Focusable="False">       <Grid.RowDefinitions>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>         <RowDefinition Height="Auto"></RowDefinition>       </Grid.RowDefinitions>       <Grid.ColumnDefinitions>         <ColumnDefinition Width="Auto"></ColumnDefinition>         <ColumnDefinition Width="*" MinWidth="50" MaxWidth="800"></ColumnDefinition>         <ColumnDefinition Width="Auto"></ColumnDefinition>       </Grid.ColumnDefinitions>       <Label Grid.Row="0" Grid.Column="0" Margin="3" VerticalAlignment="Center">A</Label>       <TextBox Grid.Row="0" Grid.Column="1" Margin="3" Height="Auto" VerticalAlignment="Center"></TextBox>       <Button Grid.Row="0" Grid.Column="2" Margin="3" Padding="2">A</Button>       <Label Grid.Row="1" Grid.Column="0" Margin="3" VerticalAlignment="Center">A</Label>       <TextBox Grid.Row="1" Grid.Column="1" Margin="3" Height="Auto"  VerticalAlignment="Center"></TextBox>       <Button Grid.Row="1" Grid.Column="2" Margin="3" Padding="2">B</Button>       <Label Grid.Row="2" Grid.Column="0" Margin="3" VerticalAlignment="Center">B</Label>       <TextBox Grid.Row="2" Grid.Column="1" Margin="3" Height="Auto"  VerticalAlignment="Center"></TextBox>       <Button Grid.Row="2" Grid.Column="2" Margin="3" Padding="2">B</Button>       <Label Grid.Row="3" Grid.Column="0" Margin="3" VerticalAlignment="Center">C</Label>       <TextBox Grid.Row="3" Grid.Column="1" Margin="3" Height="Auto" VerticalAlignment="Center"></TextBox>       <Button Grid.Row="3" Grid.Column="2" Margin="3" Padding="2">C</Button>       <Label Grid.Row="4" Grid.Column="0" Margin="3" VerticalAlignment="Center">D</Label>       <TextBox Grid.Row="4" Grid.Column="1" Margin="3" Height="Auto"  VerticalAlignment="Center"></TextBox>       <Button Grid.Row="4" Grid.Column="2" Margin="3" Padding="2">D</Button>       <Label Grid.Row="5" Grid.Column="0" Margin="3" VerticalAlignment="Center">E</Label>       <TextBox Grid.Row="5" Grid.Column="1" Margin="3" Height="Auto"  VerticalAlignment="Center"></TextBox>       <Button Grid.Row="5" Grid.Column="2" Margin="3" Padding="2">E</Button>       <Label Grid.Row="6" Grid.Column="0" Margin="3" VerticalAlignment="Center">F:</Label>       <TextBox Grid.Row="6" Grid.Column="1" Margin="3" Height="Auto" VerticalAlignment="Center"></TextBox>       <Button Grid.Row="6" Grid.Column="2" Margin="3" Padding="2">B</Button>       <Label Grid.Row="7" Grid.Column="0" Margin="3" VerticalAlignment="Center">S</Label>       <TextBox Grid.Row="7" Grid.Column="1" Margin="3" Height="Auto"  VerticalAlignment="Center"></TextBox>       <Button Grid.Row="7" Grid.Column="2" Margin="3" Padding="2">B</Button>     </Grid>   </ScrollViewer>   </DockPanel> </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 Content   Public Partial Class ScrollableTextBoxColumn     Inherits System.Windows.Window     Public Sub New()       InitializeComponent()     End Sub     Private Sub LineUp(sender As Object, e As RoutedEventArgs)       scroller.LineUp()     End Sub     Private Sub LineDown(sender As Object, e As RoutedEventArgs)       scroller.LineDown()     End Sub     Private Sub PageUp(sender As Object, e As RoutedEventArgs)       scroller.PageUp()     End Sub     Private Sub PageDown(sender As Object, e As RoutedEventArgs)       scroller.PageDown()     End Sub   End Class End Namespace