title: How to get VBA excel addin .xlam to replace itself by a remote updated .xlam?
body: <p>I need some way to update an excel addin shared among my staffs so as everyone don't have to download &amp; install it manually.</p>
  
  <p>I have googled and see that we can write file to the OS file system so the task ends up with writing the new-version addin, i.e. the .xlam file, to overwrite itself.</p>
  
  <p>I have no idea on how to do this. If you do have ones, please share! Thank you!</p>