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UIElementLostMouseCapture Event

Occurs when this element loses mouse capture.

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

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

When an element captures the mouse, it receives mouse input even if the pointer is outside its bounds. The mouse is typically captured only during drag-and-drop operations.

Because this event uses bubbling routing, the element that loses capture might be a child element instead of the element where the event handler is actually attached. Check the in the event data to determine the actual element that lost capture.

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

Identifier field


Routing strategy




  • There is no defined corresponding tunneling event.

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

.NET Framework
Available since 3.0
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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