Grid PreviewMouseDown action and MouseDown action : Grid Event « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » Grid Event 
16.36.1.Grid PreviewMouseDown action and MouseDown action
<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="AddHandler" Height="300" Width="300">
  <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
    <Button>

      <Grid PreviewMouseDown="PreviewMouseDownGrid" MouseDown="MouseDownGrid">
        <Grid.ColumnDefinitions>
          <ColumnDefinition />
          <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Canvas Width="20" Height="18" VerticalAlignment="Center">

          <Ellipse x:Name="myEllipse" Canvas.Left="1" Canvas.Top="1" Width="16" Height="16"
                   Fill="Yellow" Stroke="Black" />
        </Canvas>

      </Grid>
    </Button>
  </Grid>
</Window>
//File:Window.xaml.vb


Imports System
Imports System.Windows
Imports System.Diagnostics
Imports System.Windows.Shapes
Imports System.Windows.Input

Namespace WpfApplication1
  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 MouseDownGrid(sender As Object, e As RoutedEventArgs)
      Debug.WriteLine("MouseDownGrid")
    End Sub
  End Class
End Namespace
WPF Grid Preview Mouse Down Action And Mouse Down Action
16.36.Grid Event
16.36.1.Grid PreviewMouseDown action and MouseDown actionGrid PreviewMouseDown action and MouseDown action
16.36.2.Grid MouseMoveGrid MouseMove
16.36.3.Grid MouseLeftButtonDownGrid MouseLeftButtonDown
16.36.4.Grid MouseLeftButtonUpGrid MouseLeftButtonUp
16.36.5.Grid mouse down eventGrid mouse down event
16.36.6.Grid Preview mouse down eventGrid Preview mouse down event
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