When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.
Namespace: System.Windows Assembly: PresentationCore (in presentationcore.dll)
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 method is protected virtual and is intended to be overridden by subclasses of RoutedEventArgs.
This method has no default implementation.
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.