But it isn't a vba question. That said, there are plenty of useful programming examples in the VBA forum, especially, showing how to work with Word's object model.

vmsobral: You refer to c#, which I'm not sure anyone here knows much about. As for:
without knowing what you're trying to accomplish, it's rather hard to say. Some customisations might best be implemented via custom Quick Parts, for example.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]