What is ActiveX Control?
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ActiveX controls are the program, sometimes also called "Add-on" that are used on the Internet. They can enhance your browsing experience by allowing animation or they can help with tasks such as animation etc.
ActiveX controls and web browser add-ons are small programs that
are used extensively on the Internet. They can make browsing more enjoyable by
providing toolbars, stock tickers, video, animated content, and more. These
programs can malfunction, however, or give you content you don't want. In some
cases, these programs can be used to collect information from your computer in
ways you might not approve of, possibly damage information on your computer,
install software on your computer without your consent, or allow someone else to
control your computer remotely. Given these risks, you should only install
ActiveX controls or add-ons if you completely trust the publisher and the
website offering it.
An ActiveX control is a component program object
that can be re-used by many application programs within a computer or
among computers in a network. The technology for creating ActiveX
controls is part of Microsoft's overall ActiveX set of technologies, chief of which is the Component Object Model
(COM). ActiveX controls can be downloaded as small programs or
animations for Web pages, but they can also be used for any
commonly-needed task by an application program in the latest Windows and
Macintosh environments. In general, ActiveX controls replace the
earlier OCX (Object Linking and Embedding custom controls). An ActiveX control is roughly equivalent in concept and implementation to the Java applet.
An ActiveX control can be created in any programming language that
recognizes Microsoft's Component Object Model. The distributed support
for COM is called the Distributed Component Object Model (DCOM). In implementation, an ActiveX control is a dynamic link library (DLL) module. An ActiveX control runs in what is known as a container,
an application program that uses the Component Object Model program
interfaces. This reuseable component approach to application development
reduces development time and improves program capability and quality.
Windows application development programs such as PowerBuilder and Microsoft Access take advantage of ActiveX controls.
Some websites require you to install ActiveX controls to see the site or
perform certain tasks on it. When you visit such a site, Internet
explorer asks if you want to install the ActiveX control.
The website that provides the ActiveX control should tell you what the
control is for , It should also provide relevant details on the page
before or after uou see the warning. Internet Explorer blocks websites
from using and ActiveX control on your computer if the website tries to
use the ActiveX control in a way that might not be safe.
Security Concerns
You should avoid installing ActiveX controls unless you trust their source. Certain ActiveX controls are normal — for example, if you’re using Internet Explorer you probably have the Flash Player ActiveX control installed — but you should avoid installing other ActiveX controls if possible.For example, while Oracle is a trustworthy corporation that isn’t out to infect your computer (unless you count the Ask Toolbar they slip into updates), the Java ActiveX control has security vulnerabilities and could be used to infect your computer. The more ActiveX controls you install, the more websites can take advantage of their problems to damage your computer. Reduce your attack surface by uninstalling potentially vulnerable ActiveX controls you don’t use.
Modern versions of Internet Explorer include features like ActiveX Filtering, Protected Mode, and “killbits” that prevent vulnerable ActiveX controls from running. Unfortunately, ActiveX controls are unsecure by their very design and nothing can be done to make them completely secure.
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