Can I add action to 'Done' button on input pad on iPhone?

There is a 'Done' button on the input pad on iphone, but there is no action to it by default. Can I add an action to it? For example, hide the input pad when 'Done' is pressed?

From stackoverflow

• In your keyboard delegate you need to give up the focus. E.g

  - (BOOL)textFieldShouldReturn:(UITextField *)aTextField 
  {
    [aTextField resignFirstResponder];
    return YES;
  }
  

  This works for both the done and return keys.

  iPhoney : Thanks, this works well.