title: How to hook into Contact Form 7 Before Send
body: <p>I have a plugin I am writing that I want to interact with Contact Form 7.
  In my plugin I added the following action add_action</p>
  
  <pre><code>add_action("wpcf7_before_send_mail", "wpcf7_do_something_else");
  
  function wpcf7_do_something_else(&amp;$wpcf7_data) {
  
      // Here is the variable where the data are stored!
      var_dump($wpcf7_data);
  
      // If you want to skip mailing the data, you can do it...
      $wpcf7_data-&gt;skip_mail = true;
  
  }
  </code></pre>
  
  <p>I submitted the contact form but the add_action I had did nothing.
  I'm unsure how to make my plugin intercept or do something when Contact Form 7
  does something. Any, help on how to do this?</p>