title: VIM script to surround multiline comment with comment character
body: <p>For header style comments (including major new sections of code within the file) at my place of work, we use the following standard:</p>
  
  <pre><code>##################################
  # This is a multiline comment    #
  # and we've surrounded it by the #
  # comment symbol.                #
  ##################################
  </code></pre>
  
  <p>When there's a lengthy multiline comment (as there so often is in descriptive headers), this can take a minute.  It's such a trivial task that I'd like to automate it.  My goal is to write a script that allows me to select a range (in visual mode), enter the command, and enter the comment character, resulting in enclosing the selected lines in a box like above. I've made some attempts at a VIM script, but honestly, having never written a VIM script before, my code is a mess, and I think it would actually be detrimental to the cause to post it.</p>
  
  <p>Any suggestions as to how to go about building this?</p>