The InitEvent(String, Boolean, Boolean) method is used to initialize the value of an Event created through the IDocumentEvent interface.

If an event is cancelable, the PreventDefault method is used to signify that the event is to be canceled, meaning any default action normally taken by the implementation as a result of the event will not occur.

Invoking this method prevents event from reaching any event listeners registered after the current one and when dispatched in a tree also prevents event from reaching any other objects.

The StopPropagation method is used prevent further propagation of an event during event flow.