Send e-mail when webform submission changes Well, I want to send an e-mail when the web form is submitted, and when it is edited, so how can I do this?
The employee fills a form, and submit it, an email have to be sent to the boss, then, the boss approved or denied the form, and e mail is sent to the employee.
If you look here : http://drupalcontrib.org/api/drupal/contributions!webform!webform.api.php/group/webform_hooks/7 , you'll see that Webform provides some hooks on which you can act. 

There's a hook called 'hook_webform_submission_update', which triggers on the update of a submission. Using that one, you can check if the boss approved/denied it, and send out an email.

The plain 'send email on submission' can be configured through Webform itself, so you won't need to use a Webform hook for that. Although you could if you want to.