What Is Windows Vista Sidebar?

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Back when Microsoft shipped Windows 98, it added a debatably useful feature called Active Desktop that provided an HTML layer on top of the traditional desktop. Active Desktop was an attempt to capitalize on the then-emerging trend of users wanting to combine live data from the Web with their PC operating system. The term for this, at the time, was push technology. The idea was that although you could use a Web browser to manually find, or pull down, data from the Web, a push technology client like Active Desktop could push data to the user automatically with no interaction required. Ultimately, most users found Active Desktop to be confusing and undesirable, and although the feature was never really removed from Windows, it was deemphasized in subsequent Windows versions, such as Windows XP. It’s still possible to add web content to your XP desktop via Active Desktop if you really want to.

Active Desktop may have failed, but the underlying benefits of push technology are still valid today. You can see that newer versions of this functionality exist in such technologies as RSS (Really Simple Syndication), which in fact, attempts to solve essentially the same problem as Active Desktop: Rather than force users to manually search for the content they want, that content is delivered automatically to them using a unique kind of client (in this case, an RSS client). One such RSS client is included in Windows Vista as part of Internet Explorer 7.

In Windows Vista, Active Desktop is finally gone forever. But integrated push technology lives on with a brand-new feature called Windows Sidebar. Like Active Desktop, Windows Sidebar is available by default and is running when you start up your PC, unless you configure it not to do so. But Windows Sidebar solves one of the major problems with Active Desktop by moving the main user interface to the side of the screen where it won’t typically be hidden under your open applications and other windows.

Put simply, Windows Sidebar is a panel that sits at the edge of your screen and houses small gadgets, or mini-applications, each of which can provide specific functionality. Gadgets typically connect to data somewhere, be it on your PC or on the Internet. Windows Vista ships with a variety of these gadgets, but you can download many more online, and if you’re familiar with Web technologies like HTML (HyperText Markup Language), DHTML (Dynamic HTML), and JavaScript, you can even build your own gadgets.

Because Windows Sidebar does take up a small portion of vertical real estate on your screen, this feature is more useful for those with widescreen displays. That said, Windows Sidebar appears under other windows by default so that users with normal square-shaped screens can use it as well.

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