title: Share code between office applications
body: <p>I have written two addins , 1 for excel and 1 for word. However these addins have a lot of duplicates: Database handling, file handling,array handling which I would like to update 1 place instead of two. </p>
  
  <p>We do have access to sharepoint, and could get access to visual studio. The thing is that people like to use file explorer and find the correct word or excel file, then open it then press a button inside the application  which then should do things with the active document. </p>
  
  <p>This is why we haven't written it as a .Net application yet, because that requires that people browse for the file inside the .NET application uless I am mistaken.</p>
  
  <p>Is it possible to make an Addin which works both excel and word, or a dll? AnAnother important thing is that it should be easy to roll out a new version to the user, like stored on a network drive or similar.</p>