Detect whether the mouse button is pressed or released using the MouseButtonState property.

    


<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="DetectMouseButtonState" Height="400" Width="400">

  <StackPanel Height="100" Width="100" 
      MouseLeftButtonDown="HandleButtonDown" 
      MouseLeftButtonUp="HandleButtonDown" 
      Background="Red"
      DockPanel.Dock="Left">
    <TextBlock>Click on Me</TextBlock>
  </StackPanel>
</Window>
//File:Window.xaml.vb

Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Input

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub
    Private Sub HandleButtonDown(sender As Object, e As MouseButtonEventArgs)
      Dim sourceStackPanel As StackPanel = TryCast(e.Source, StackPanel)

      If e.ButtonState = MouseButtonState.Pressed Then
        sourceStackPanel.Width = 200
        sourceStackPanel.Height = 200
      ElseIf e.ButtonState = MouseButtonState.Released Then
        sourceStackPanel.Width = 100
        sourceStackPanel.Height = 100
      End If
    End Sub
  End Class
End Namespace

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4.	Grid MouseLeftButtonDown action and PreviewMouseLeftButtonDown action
5.	Handler MouseLeftButtonDown and MouseLeftButtonUp events
6.	Make an object follow the mouse pointer as it moves on the screen.
7.	Use Mouse.AddPreviewMouseDownHandler(myEllipse, PreviewMouseDownEllipse);
8.	Use Mouse.AddMouseDownHandler(myEllipse, MouseDownEllipse);
9.	Use Mouse.PreviewMouseDown /Mouse.MouseDown Attribute from Grid element
10.	A line which monitors the mouse entering its area
11.	Mouse Position and TranslateTransform
12.	Mouse Position
13.	Get mouse position with Mouse.GetPosition
14.	Replease mouse with Mouse.Capture(null)
15.	Retrieving the mouse position relative to controls on a Window
16.	Mouse cursor override and clear
17.	Check the mouse event source
18.	Use the Mouse Wheel action methods that are defined by the IScrollInfo interface
19.	Change control background in mouse enter and leave
20.	Use EventSetter to add mouse event handler
21.	Mouse.LostMouseCaptureEvent
22.	Use Mouse.Capture to let a Control capture an event
23.	Point Hit Test

Detect whether the mouse button is pressed or released using the MouseButtonState property. : Mouse « Windows Presentation Foundation « VB.Net

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