Flag indicating whether the sending expression was changed directly, or a dependent expression of the sender was changed. If the sender was changed directly (DependencyEvent == false), the StateFlags indicate what piece of state was changed, and Value and OldValue contain the new and previous values of that piece of state, respectively. Otherwise, Value and OldValue are null (Nothing).

The event args originally fired by DependencyEventSender, if DependencyEvent is true, otherwise null (Nothing).

The expression object that originally fired DependencyEventArgs, if DependencyEvent is true, otherwise null (Nothing).

The previous value of the property indicated in StateFlags. If DepedencyEvent is true, Value and OldValue will be null and the values must be obtained from DepedencyEventArgs.

The new value of the property indicated in StateFlags. If DepedencyEvent is true, Value and OldValue will be null and the values must be obtained from DepedencyEventArgs.