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AutomationFocusChangedEventHandler Delegate

Represents the method implemented by the UI Automation client application to handle the event raised by a UI Automation provider when the focus has changed.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public delegate void AutomationFocusChangedEventHandler(
	Object sender,
	AutomationFocusChangedEventArgs e


Type: System.Object
The object that raised the event.
Type: System.Windows.Automation.AutomationFocusChangedEventArgs
Information about the event.

Use an AutomationFocusChangedEventHandler delegate to define the method that is called by a client to handle UI Automation focus-changed events.

The AutomationElement represented by sender might not have any cached properties or patterns, depending on whether the application subscribed to this event while a CacheRequest was active.

The following example implements a delegate to handle focus-changed events.

private void OnFocusChanged(object src, AutomationFocusChangedEventArgs e)
    AutomationElement elementFocused = src as AutomationElement;
    // TODO: Do something in response to the focus change.

.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.