TextBox MouseLeftButtonDown action and PreviewMouseLeftButtonDown action

    

<Window x:Class="TunnelingBubbling.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TunnelingBubbling">
  
    <Grid MouseLeftButtonDown="MouseDownGrid"
          PreviewMouseLeftButtonDown="PreviewMouseDownGrid"
      Width="300" Height="300">

    <Button PreviewMouseLeftButtonDown="PreviewMouseDownButton"
      MouseLeftButtonDown="MouseDownButton"
      Click="MyClickEvent"
      Name="btnGo">

      <TextBox MouseLeftButtonDown="MouseLeftButtonDown"
        PreviewMouseLeftButtonDown="PreviewMouseLeftButtonDown"
        Width="200" Height="30" Name="textBox1">
      </TextBox>
    </Button>
  </Grid>  
</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
Imports System.Diagnostics

Namespace TunnelingBubbling
  Public Partial Class Window1
    Inherits System.Windows.Window

    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub PreviewMouseDownGrid(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("PreviewMouseDownGrid")
    End Sub

    Private Sub PreviewMouseDownButton(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("PreviewMouseDownButton")
    End Sub

    Private Sub PreviewMouseLeftButtonDown(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("PreviewMouseLeftButtonDown")
    End Sub

    Private Sub MyClickEvent(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("MyClickEvent")
    End Sub

    Private Sub MouseLeftButtonDown(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("MouseLeftButtonDown")
    End Sub

    Private Sub MouseDownButton(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("MouseDownButton")
    End Sub

    Private Sub MouseDownGrid(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("MouseDownGrid")
    End Sub

  End Class
End Namespace

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TextBox MouseLeftButtonDown action and PreviewMouseLeftButtonDown action : TextBox « Windows Presentation Foundation « VB.Net

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