Deactivate Event

Form.Deactivate Event

Occurs when the form loses focus and is no longer the active form.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

Public Event Deactivate As EventHandler
Dim instance As Form
Dim handler As EventHandler

AddHandler instance.Deactivate, handler

/** @event */
public void add_Deactivate (EventHandler value)

/** @event */
public void remove_Deactivate (EventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

You can use this event to perform tasks such as updating another window in your application with data from the deactivated form.

For more information about handling events, see Consuming Events.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the Deactivate event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing System.Windows.Forms.MessageBox.Show with System.Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type Form named Form1. Then ensure that the event handler is associated with the Deactivate event.

Private Sub Form1_Deactivate(sender as Object, e as EventArgs) _ 
     Handles Form1.Deactivate

   MessageBox.Show("You are in the Form.Deactivate event.")

End Sub

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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