Press F1 to get help : Command « Windows Presentation Foundation « VB.Net

1. VB.Net
2. Windows Presentation Foundation
3. Command

Press F1 to get help

     
<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Press F1 to get help" Height="250" Width="400">
  <DockPanel>
    <Menu DockPanel.Dock ="Top" HorizontalAlignment="Left" Background="White">
      <MenuItem Header="_Edit">
        <MenuItem Command ="Copy"/>
        <MenuItem Command ="Cut"/>
        <MenuItem Command ="Paste"/>
      </MenuItem>
    </Menu>
    <TextBox AcceptsReturn ="True" Foreground ="Black" Background ="AliceBlue"></TextBox>
  </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 WpfApplication1
  Public Partial Class MainWindow
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()

      Dim helpBinding As New CommandBinding(ApplicationCommands.Help)
      AddHandler helpBinding.CanExecute, AddressOf CanHelpExecute
      AddHandler helpBinding.Executed, AddressOf HelpExecuted
      CommandBindings.Add(helpBinding)
    End Sub

    Private Sub CanHelpExecute(sender As Object, e As CanExecuteRoutedEventArgs)
      e.CanExecute = True
    End Sub
    Private Sub HelpExecuted(sender As Object, e As ExecutedRoutedEventArgs)
      MessageBox.Show("support", "Help!")
    End Sub
  End Class
End Namespace

   
    
    
    
    
  

Related examples in the same category

1.	Invoking Copy command with a Button
2.	Button CommandTarget Binding
3.	Creating CommandBinding and attaching an Executed and CanExecute handler
4.	Command Handler Command Binding in Xaml
5.	Property changed callback
6.	Using CommandBinding and ExecutedRoutedEventHandler to bind Application event to an event handler method
7.	Create CommandBindings in Xaml and bind to Button
8.	Bind TextBox save command to CommandBinding
9.	Help command
10.	Command Enabling