title: EventLog. Unload EventMessageFile (DLL)
body: <p>I install NT service and add info about 'message.dll' file into registry for EvenLog.
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\MyApp
     EventMessageFile = C:\message.dll</p>
  
  <p>Start service and view service's logging info messages in EventLog viewer.
  Works fine.</p>
  
  <p>Next, uninstall service and try to remove message.dll file.
  Failed! I receive 'Access deny' messagebox because this DLL is loaded.</p>
  
  <p>My question: How can I properly remove/unload/uninstall message.dll in my case?</p>
  
  <p>Thanks a lot,
  Dmitry</p>