Application.Deactivated Application.Deactivated Application.Deactivated Application.Deactivated Event


Occurs when an application stops being the foreground application.

 event EventHandler ^ Deactivated;
public event EventHandler Deactivated;
member this.Deactivated : EventHandler 
Public Event Deactivated As EventHandler 


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

  Deactivated="App_Deactivated" />
using System;
using System.Windows;

namespace SDKSample
    public partial class App : Application
        bool isApplicationActive;

        void App_Activated(object sender, EventArgs e)
            // Application activated
            this.isApplicationActive = true;

        void App_Deactivated(object sender, EventArgs e)
            // Application deactivated
            this.isApplicationActive = false;

Imports Microsoft.VisualBasic
Imports System
Imports System.Windows

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


A Windows Presentation Foundation 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).

Applies to

See also