Show the effect of each value of the Dock property by manipulating two Rectangle elements.

      

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      x:Class="dockpanel_dockprop_cs.Page1"
      WindowTitle="Docking Sample">
  <DockPanel Background="White">
    <StackPanel Orientation="Horizontal" DockPanel.Dock="Top" Margin="0,0,0,10">
      <Button Click="OnClick1" Background="LightCoral">Dock = "Left"</Button>
      <Button Click="OnClick2" Background="LightCoral">Dock = "Right"</Button>
      <Button Click="OnClick3" Background="LightCoral">Dock = "Top"</Button>
      <Button Click="OnClick4" Background="LightCoral">Dock = "Bottom"</Button>
      <Button Click="OnClick5" Background="LightSkyBlue" Foreground="White">Dock = "Left"</Button>
      <Button Click="OnClick6" Background="LightSkyBlue" Foreground="White">Dock = "Right"</Button>
      <Button Click="OnClick7" Background="LightSkyBlue" Foreground="White">Dock = "Top"</Button>
      <Button Click="OnClick8" Background="LightSkyBlue" Foreground="White">Dock = "Bottom"</Button>
      <Button Click="OnClick9" Background="White">LastChildDock="True"</Button>
      <Button Click="OnClick10" Background="White">LastChildDock="False"</Button>
    </StackPanel>

    <Border Background="LightGoldenRodYellow" BorderBrush="Black" BorderThickness="1">
      <DockPanel Name="AnotherDockPanel">
        <Rectangle Name="rect1" MinWidth="200" MinHeight="200" Stroke="Black" Fill="LightCoral" />
        <Rectangle Name="rect2" MinWidth="200" MinHeight="200" Stroke="Black" Fill="LightSkyBlue" />
      </DockPanel>
    </Border>
  </DockPanel>
</Page>

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Controls.Primitives
Imports System.Windows.Documents
Imports System.Windows.Navigation

Namespace dockpanel_dockprop_cs
  Public Partial Class Page1
    Inherits Page
    Public Sub OnClick1(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect1, Dock.Left)
    End Sub

    Public Sub OnClick2(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect1, Dock.Right)
    End Sub

    Public Sub OnClick3(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect1, Dock.Top)
    End Sub

    Public Sub OnClick4(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect1, Dock.Bottom)
    End Sub

    Public Sub OnClick5(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect2, Dock.Left)
    End Sub

    Public Sub OnClick6(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect2, Dock.Right)
    End Sub

    Public Sub OnClick7(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect2, Dock.Top)
    End Sub

    Public Sub OnClick8(sender As Object, e As RoutedEventArgs)
      DockPanel.SetDock(rect2, Dock.Bottom)
    End Sub

    Public Sub OnClick9(sender As Object, e As RoutedEventArgs)
      AnotherDockPanel.LastChildFill = True
    End Sub

    Public Sub OnClick10(sender As Object, e As RoutedEventArgs)
      AnotherDockPanel.LastChildFill = False
    End Sub
  End Class
End Namespace

1.	Using DockPanel.Dock to position elements
2.	Use DockPanel to layout a Window
3.	Nested DockPanel
4.	Fill DockPanel with Labels and Buttons
5.	Window with DockLayout
6.	Dock UI Elements to the Edges of a Form
7.	Put a StackPanel on the Left
8.	Set Dock position for DockPanel layout
9.	Differences of StackPanel and DockPanel
10.	Insert to a Panel by index
11.	Get all children from a Panel
12.	Find the index number of a newly added element within a panel, using the IndexOf method

Show the effect of each value of the Dock property by manipulating two Rectangle elements. : DockPanel « Windows Presentation Foundation « VB.Net

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