Article
11/18/2011

MouseWheelEventArgs Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Provides data for the MouseWheel routed event.

Inheritance Hierarchy

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.Input.MouseEventArgs
        System.Windows.Input.MouseWheelEventArgs

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

Syntax

'Declaration
Public NotInheritable Class MouseWheelEventArgs _
    Inherits MouseEventArgs

public sealed class MouseWheelEventArgs : MouseEventArgs

The MouseWheelEventArgs type exposes the following members.

Properties

	Name	Description
	Delta	Gets a value that indicates the amount that the mouse wheel rotated relative to its starting state or to the last occurrence of the event.
	Handled	Gets or sets a value that marks the routed event as handled, and prevents most handlers along the event route from rehandling the same event.
	OriginalSource	Gets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)
	StylusDevice	Gets an object that reports stylus device information, such as the collection of stylus points associated with the input. (Inherited from MouseEventArgs.)

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetPosition	Returns the x- and y-coordinates of the mouse pointer position, optionally evaluated against a coordinate origin of a supplied UIElement. (Inherited from MouseEventArgs.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

Because MouseWheel is a routed event, it can invoke handlers on objects other than the object that raised the event. For more information about routed events, see Events Overview for Silverlight. MouseWheelEventArgs has a Handled property, which enables marking the event as handled and shortens the event route in all but exceptional handling cases.

Handling the events that are generated by the mouse wheel might also involve handling HTML Document Object Model (DOM) events. For more information, see Mouse Wheel Input.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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