RichEditBox.SelectionChanging Event

Definition

Namespace:

Windows.UI.Xaml.Controls

Occurs when the text selection starts to change.

// Register
event_token SelectionChanging(TypedEventHandler<RichEditBox, RichEditBoxSelectionChangingEventArgs const&> const& handler) const;

// Revoke with event_token
void SelectionChanging(event_token const* cookie) const;

// Revoke with event_revoker
RichEditBox::SelectionChanging_revoker SelectionChanging(auto_revoke_t, TypedEventHandler<RichEditBox, RichEditBoxSelectionChangingEventArgs const&> const& handler) const;

public event TypedEventHandler<RichEditBox,RichEditBoxSelectionChangingEventArgs> SelectionChanging;

function onSelectionChanging(eventArgs) { /* Your code */ }
richEditBox.addEventListener("selectionchanging", onSelectionChanging);
richEditBox.removeEventListener("selectionchanging", onSelectionChanging);
- or -
richEditBox.onselectionchanging = onSelectionChanging;

Public Custom Event SelectionChanging As TypedEventHandler(Of RichEditBox, RichEditBoxSelectionChangingEventArgs) 

<RichEditBox SelectionChanging="eventhandler"/>

Event Type

TypedEventHandler<RichEditBox,RichEditBoxSelectionChangingEventArgs>

Windows requirements

Device family	Windows 10, version 1809 (introduced in 10.0.17763.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v7.0)