The annotation editor extension.
[Visual Basic .NET] Public Sub Startup ( _ ByVal pEditor As IEditor _ )
[C#] public void Startup ( IEditor pEditor );
Product Availability
Available with ArcGIS Desktop.
Remarks
Startup is called when the constructor is instantiated by the AnnotationEditExtension. If you are implementing this interface Startup is where you should obtain a reference to IAnnotationEditExtension from the Editor.