[This is preliminary documentation and subject to change.]
The __InstanceOperationEvent system class is a base class from which events derive that describe instance creation, modification, and deletion. Instances of this class never occur directly. Only instances of classes deriving from this class are actually used within WBEM.
class __InstanceOperationEvent : __Event
{
object TargetInstance;
};
__InstanceCreationEvent, __InstanceDeletionEvent, __InstanceModificationEvent.