Event Args. On Set Source(Object) Method
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When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.
protected: virtual void OnSetSource(System::Object ^ source);
protected virtual void OnSetSource (object source);
abstract member OnSetSource : obj -> unit override this.OnSetSource : obj -> unit
Protected Overridable Sub OnSetSource (source As Object)
Notes to Inheritors
Changing the reported source of an event programmatically can potentially require updating the type-specific data within the event. For this reason, the OnSetSource(Object) method is protected virtual and is intended to be overridden by subclasses of RoutedEventArgs.
This method has no default implementation.