UIElement.LosingFocus UIElement.LosingFocus UIElement.LosingFocus UIElement.LosingFocus Event


Occurs before a UIElement loses focus. This event is raised synchronously to ensure focus isn't moved while the event is bubbling.

public : event TypedEventHandler<UIElement, LosingFocusEventArgs> LosingFocus
// Register
event_token LosingFocus(TypedEventHandler<UIElement, LosingFocusEventArgs> const& handler) const;

// Revoke with event_token
void LosingFocus(event_token const& cookie) const;

// Revoke with event_revoker
LosingFocus_revoker LosingFocus(auto_revoke_t, TypedEventHandler<UIElement, LosingFocusEventArgs> const& handler) const;
public event TypedEventHandler<UIElement, LosingFocusEventArgs> LosingFocus
Public Event LosingFocus As TypedEventHandler (Of UIElement, LosingFocusEventArgs)
<uiElement LosingFocus="eventhandler"/>

Additional features and requirements

Device family
Windows 10 Creators Update (introduced v10.0.15063.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v4)


We recommend using the UIElement focus routed events instead of FocusManager events whenever possible.

Only a single UI element at a time can have focus.

A control can lose focus when another control gets focus, the application view changes, the user switches applications, or the user interacts with the system such that the application is no longer in the foreground.

When programmatically navigating between elements, FocusNavigationDirection.Previous and FocusNavigationDirection.Next cannot be used with FindNextElementOptions. Only FocusNavigationDirection.Up, FocusNavigationDirection.Down, FocusNavigationDirection.Left, or FocusNavigationDirection.Right are valid.

LosingFocus is a routed event. For more info on the routed event concept, see Events and routed events overview.

See also