A quick 'strings' of AdvNotify.dll displays the text "AdvNotify requires MS Windows NT Version 4 or higher".

With regard to providing the functionality via a ActiveX component, the code that does all the work is the dll above, which is being accessed via native Win32::API, which translates to the LoadLibraryA/GetProcAddress/FreeLibrary native apis. It would therefore make much more sense to bypass perl and write the ActiveX component to go directly to the AdvNotify.dll. The dll carries the owners copyright so you wouldn't be cheating the owner, but you should read the attached licence very carefully and/or contact the author, Amine Moulay Ramdane, to get his take on you doing this.