TextCompositionManager.PreviewTextInputUpdate Attached Event
Occurs when a TextComposition is updated.
Assembly: PresentationCore (in PresentationCore.dll)
This is the tunneling version of this event. For the bubbling version, see TextInputUpdate.
This is an attached event identified by the PreviewTextInputUpdateEvent field. Use the AddPreviewTextInputUpdateHandler and RemovePreviewTextInputUpdateHandler methods to manage this event on a specified dependency object.