An application-level solution is one of the key functionalities provided by VSTO 3.0 for Office 2007 development using .NET technology. An application-level solution can be achieved by creating application-level add-ins. As we have mentioned earlier, the Task Pane customization and Ribbon customization are some of the application-level solutions that can be performed using VSTO. Whatever customization you do to the application will be in the Microsoft Office Word application, and this customization will be specific to the application that you are customizing, and it will be available for all of the documents used by this application.
Task Pane: Application-level customization
The Microsoft Office 2007 system provides ...