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UIElementPreviewKeyDown Event

Occurs when a key is pressed while focus is on this element.

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

public event KeyEventHandler PreviewKeyDown
event KeyEventHandler^ PreviewKeyDown {
	virtual void add(KeyEventHandler^ value) sealed;
	virtual void remove(KeyEventHandler^ value) sealed;
abstract PreviewKeyDown : IEvent<KeyEventHandler,
override PreviewKeyDown : IEvent<KeyEventHandler,
Public Event PreviewKeyDown As KeyEventHandler

Key handling interacts with other platform features such as commanding and text composition. The KeyDown event is a lower-level text input event that might not behave as expected on certain controls. This is because some controls have control compositing or class handling that provides a higher-level version of text input handling and related events.

This event creates an alias for the KeyboardPreviewKeyDown attached event for this class, so that PreviewKeyDown is part of the class members list when UIElement is inherited as a base element. Event handlers that are attached to the PreviewKeyDown event are attached to the underlying KeyboardPreviewKeyDown attached event and receive the same event data instance.

Routed Event Information

Identifier field


Routing strategy




  • The corresponding bubbling event is KeyDown.

  • Override OnPreviewKeyDown to implement class handling for this event in derived classes.

Version Information
.NET Framework
Available since 3.0
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