Activated Event

Window.Activated Event


Occurs when a window becomes the foreground window.

Namespace:   System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)

public event EventHandler Activated

A window is activated (becomes the foreground window) when:

  • The window is first opened.

  • A user switches to a window by selecting it with the mouse, pressing ALT+TAB, or from Task Manager.

  • A user clicks the window's taskbar button.

Windows that need to detect when they become activate can handle the Activated event.

After a window 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 inspect IsActive to determine which activation state it's in.

An application can also be Activated.

.NET Framework
Available since 3.0
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