text: **Conclusion**
  
  You can extend the fixed-format export feature of Office applications by implementing 
  
  the**IMsoDocExporter**interface. The methods of this interface provide a channel for 
  
  Office applications to communicate to the add-in the visual content and semantic 
  
  information in the document to export. The visual content of the document is provided 
  
  to the add-in as one or more in-memory enhanced metafiles. The semantic information 
  
  is provided as specially formatted comment records within this EMF. Additional methods 
  
  in the interface enable Office applications to communicate metadata and structural 
  
  information about the document. 