ActiveX control
• ActiveX
controls are small program building blocks that can serve to create distributed
applications that work over the internet through web browsers.
• An
ActiveX control can be automatically downloaded and executed by a web browser.
ActiveX is not a programming language, but rather a set of rules for how
applications should share information. Programmers can develop ActiveX controls
in a variety of languages including C, C++, visual basic, and java.
• Examples
include customized applications for gathering data, viewing certain kinds of
files, and displaying animation.
• An
ActiveX control is similar to a Java applet. Unlike Java applets, however, ActiveX
controls have full access to the Windows operating system. This gives them much
more power than Java applets, but with this power comes a certain risk that the
applet may damage software or data on your machine.
• To
control this risk, Microsoft developed a registration system so that browsers
can identify and authenticate an ActiveX control before downloading it.
• Another
difference between Java applets and ActiveX controls is that Java applets can
be written to run on all platforms, whereas ActiveX controls are currently
limited to Windows environments.
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