Windows apps
Collapse the table of content
Expand the table of content
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Mouse::PreviewMouseWheel Attached Event


Occurs when the mouse wheel rotates.

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

See AddPreviewMouseWheelHandler, RemovePreviewMouseWheelHandler

Focus or mouse capture take precedence over where the mouse pointer is; therefore, if you receive this event from a focused or captured element, the mouse pointer might in fact be over another element at the time.

This is an attached event. WPF implements attached events as routed events. Attached events are fundamentally a XAML language concept for referencing events that can be handled on objects that do not define that event, which WPF expands upon by also enabling the event to traverse a route. Attached events do not have a direct handling syntax in code; to attach handlers for a routed event in code, you use a designated Add*Handler method. For details, see Attached Events Overview.

Identifier field


Routing strategy




Return to top
© 2016 Microsoft