Windows 边栏：修订间差异

Windows 边栏是 [[Microsoft Windows]] 的组件。它允许用户在桌面一侧的垂直栏中放置多个可以显示时间、天气、日历和系统资源使用情况等信息的小工具。可以通过下载其他小工具以扩展其功能。它首次在 [[Windows Longhorn Build 3683.0.Lab06_N.020923-1821|Windows Longhorn Build 3683]] 中作为 <code>[[Windows 资源管理器|explorer.exe]]</code> 的补充引入，而最后一次出现在 [[Windows 7 Build 6469.1.fbl_find_dev(wexbuild).071002-1531|Windows 7 Build 6469]] 中。它后来被[[桌面小工具库]]取代。

Windows Sidebar was one of the features introduced in [[Windows Vista|Windows Longhorn]]. Its assemblies were found in <code>\WINDOWS\Microsoft.NET\Avalon</code>, along with other Avalon-based shell features. [[Windows Longhorn build 3683|Build 3683]] is the earliest to contain it. While it is disabled by default, it can be enabled from the [[Taskbar]] and [[Start menu|Start Menu]] Properties menu. By default, it was placed on the desktop's right side, but it could be moved to the left side. It could also be combined with the taskbar, a feature that made it disappear while its items were moved to the Sidebar. There are no tiles pinned by default, but they can be added from the context menu's "Add a Tile" option. As development progressed, more changes were introduced, such as a new taskbar with the Sidebar integrated to it, new and changed tiles, and appearance retouches.

On several builds, particularly after [[Windows Longhorn build 4015 (main)|build 4015]], <code>explorer.exe</code> is very unstable and often causes memory leaks. This is often because of the Sidebar which runs on it, meaning that disabling it will reduce these effects.

Early builds compiled after the development reset of Longhorn were functionally closer to [[Windows XP]], and thus didn't have any features from pre-reset implemented yet. While Beta 1 builds already contained some Longhorn features, the Sidebar still wasn't present, and the earliest available post-reset build to contain it is [[Windows Vista build 5212 (winmain)|build 5212]]. In the post-reset implementation, the Sidebar runs in its own process, <code>sidebar.exe</code>, instead of <code>explorer.exe</code>, a change that was made to reduce memory leaks and instabilities from the pre-reset version. This meant that the Sidebar also lost some of its previous capabilities, such as being combined with the taskbar. It also lost most of the pre-reset tiles, which by this point had been renamed to gadgets. In [[Windows Vista build 5342.2|build 5342]], some additional tiles were added, but none of them were from pre-reset.

Initially, the post-reset Sidebar had a design reminiscent of late pre-reset build, being a transparent black bar, although the opacity was decreased. In later builds, the black color was removed, leaving a fully transparent bar that now only appeared when the cursor was placed over the Sidebar's area. Otherwise, a dark shadow would appear in its place.

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While the Sidebar was one of few changes that survived the Longhorn development reset, it was eventually replaced in [[Windows 7 build 6498]] with [[Desktop Gadget Gallery]], a similar feature that allowed gadgets to be placed anywhere on the desktop, rather than in one specific area, and gave them independent customization options. Desktop Gadget Gallery was later discontinued in [[Windows 8]] due to security risks.{{efn|The update that retired Windows 7's Desktop Gadget Gallery was also backported to Windows Vista's Sidebar.}}