Application.Deactivated Event

public:
 event EventHandler ^ Deactivated;

public event EventHandler Deactivated;

member this.Deactivated : EventHandler 

Public Custom Event Deactivated As EventHandler 

Public Event Deactivated As EventHandler 

Event Type

Examples

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" />

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 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

Remarks

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).

See also

• OnDeactivated(EventArgs)
• Activated