Dec 26, 2008 04:27 AM|javito|LINK
After search and search, I have found a solution:
Word.Application app = Globals.ThisAddIn.Application;
Word.Document doc = app.ActiveDocument;
string a = doc.Content.Text;
Note that you have to include "using Word = Microsoft.Office.Interop.Word;"
So with this code above you can get all the content in a Word Document.