Occurs when an application stops being the foreground application.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
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 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 and Activated events to determine which state it's in.
is not raised for XAML browser applications (XBAPs).
The following example shows how to detect when a standalone application deactivates and activates.
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
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.