use of Activex control in web page.

Listen to a good friendly advice: just don't. Even if you use it for legitimate non-hostile purpose, from the standpoint of any reasonable and educated user, the practice is so unsafe that such users not likely will use it. Besides, this is Microsoft proprietary stuff; it won't work on other platforms; and even on Windows other browsers don't have to support it, for a good reason.
 
Even though the techniques based on hosting of ActiveX by a browser are still actively used, this is mostly limited by application internal to corporation, or practiced by computer manufacturers to support their computers via service IDs, registered with the manufacturer and similar cases. I think event in these cases, this is a pretty bad thing.
 

—SA