Application.Deactivated Event

Occurs when an application stops being the foreground application.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

'Declaration
Public Event Deactivated As EventHandler
<object Deactivated="EventHandler" .../>

A Windows Presentation Foundation (WPF) application that has one or more open windows deactivates (stops being the foreground application) when a user does the following:

  • Switches to another application by using ALT+TAB or by using Task Manager.

  • Clicks the taskbar button for a window in another application.

Applications that need to detect deactivation can handle the Deactivated event.

After an application is first activated, it may be deactivated and reactivated many times during its lifetime. If an application's behavior or state depends on its activation state, it can handle both Deactivated and Activated events to determine which state it's in.

Deactivated is not raised for XAML browser applications (XBAPs).

The following example shows how to detect when a standalone application deactivates and activates.


<Application 
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  x:Class="SDKSample.App"
  StartupUri="MainWindow.xaml"
  Activated="App_Activated" 
  Deactivated="App_Deactivated" />




Imports Microsoft.VisualBasic
Imports System ' EventArgs
Imports System.Windows ' Application

Namespace SDKSample
	Partial Public Class App
		Inherits Application
		Private isApplicationActive As Boolean

		Private Sub App_Activated(ByVal sender As Object, ByVal e As EventArgs)
			' Application activated
			Me.isApplicationActive = True
		End Sub

		Private Sub App_Deactivated(ByVal sender As Object, ByVal e As EventArgs)
			' Application deactivated
			Me.isApplicationActive = False
		End Sub
	End Class
End Namespace


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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