This post provides a quick overview of ActiveX.
ActiveX are Extension of OLE. Primarily defining how information would be shared by applications. ActiveX focus is on connected environment particularly World Wide Web. Microsoft added ActiveX support to Internet Explorer (IE 3.0) in 1996, It would download certain ActiveX for websites to enhances user experience. It has more control to windows operating system, thus it is more prone to associated security risks. ActiveX is only supported by Microsoft Operating Systems.