title: Register and unregister a DLL in a Windows Setup Project
body: <p>I have couple of dll files that need to be registered/unregistered when a Windows installer is installed/uninstalled respectively. </p>
  
  <p>I tried the following -
   Created a .bat file to register the dll. The issue is I am not able to add a .bat file using 'Custom Actions' in Setup Project.</p>
  
  <p>Also, how to run unregister dll while uninstalling ? Please advice. Thanks. </p>