May 02, 2013
Called before a drag enter event occurs.
Assembly: System.Windows (in System.Windows.dll)
The method is called before any event handler for a drag enter event is called. This method allows derived classes to handle a drag enter event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
This implementation does not change the handled state (the Handled property) of the drag enter event data.Notes to Inheritors
When overriding in a derived class, be sure to call the base class’s method so that registered delegates receive the event.