 the sender's control ID in its wParam, and a pointer to a notification parameter block in its lParam. The first three integers of the latter are as follows:
</p>
<ul>
<li> Handle of sender
</li>
<li> Control ID of sender (duplicates wParam for historical reasons)
</li>
<li> Notification code
</li>
</ul>
<p>Extra information, dependent on the notification code, may follow in the parameter block pointed to by lParam. Such information is documented in the Description field, if present.
</p>
<h3>Notepad++ mess