Initialise.cs

        public void Initialize()
        {
            DocumentCollection dm = Application.DocumentManager;

            dm.DocumentActivated += delegate(object s, DocumentCollectionEventArgs d){
                Document doc = d.Document;
                doc.CommandWillStart += delegate(object sender, CommandEventArgs e){
                    if ((e.GlobalCommandName == "PUBLISH") ||
                        (e.GlobalCommandName == "EXPORT") ||
                        (e.GlobalCommandName == "3DDWF")){
                        // Register for publishing events
                        Publisher pb = Application.Publisher;
                        pb.AboutToBeginBackgroundPublishing += new AboutToBeginBackgroundPublishingEventHandler(pb_AboutToBeginBackgroundPublishing);
                        pb.AboutToBeginPublishing += new AboutToBeginPublishingEventHandler(pb_AboutToBeginPublishing);
                        pb.BeginEntity += new BeginEntityEventHandler(pb_BeginEntity);
                        pb.BeginSheet += new BeginSheetEventHandler(pb_BeginSheet);
                    }
                };

                doc.CommandEnded += new CommandEventHandler(doc_CommandEnded);
                doc.CommandFailed += new CommandEventHandler(doc_CommandEnded);
                doc.CommandCancelled += new CommandEventHandler(doc_CommandEnded);
            };
        }

        void doc_CommandEnded(object sender, CommandEventArgs e){
            if ((e.GlobalCommandName == "PUBLISH") ||
                (e.GlobalCommandName == "EXPORT") ||
                (e.GlobalCommandName == "3DDWF")){
                // Unregister from publishing events
                Publisher pb = Application.Publisher;
                pb.AboutToBeginBackgroundPublishing -= new AboutToBeginBackgroundPublishingEventHandler(pb_AboutToBeginBackgroundPublishing);
                pb.AboutToBeginPublishing -= new AboutToBeginPublishingEventHandler(pb_AboutToBeginPublishing);
                pb.BeginEntity -= new BeginEntityEventHandler(pb_BeginEntity);
                pb.BeginSheet -= new BeginSheetEventHandler(pb_BeginSheet);
            }
        }