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Adding Third-Party Products and Services
Although the accessibility tools that are included with Windows 2000 provide some functionality for users with special needs, many users with disabilities might need assistive tools with a higher functionality for daily use. With the use of hardware and software available through ISVs, people with disabilities can enhance their use of the Windows 2000 operating system.
"Certified for Microsoft Windows" Logo
Throughout the computer industry, hardware and software developers and vendors are collaborating to bring about accessible products for all computer users. The Certified for Microsoft Windows Specification now applies to Windows 2000. The specification promotes accessible design and includes a set of requirements and a checklist for application developers. The specification addresses such requirements as closed captioning in place of sound to convey information, visibility of the insertion point indicator (sometimes called a "caret"), and the ability to control the mouse and keyboard and to turn off animations. The major goal of this collaborative effort is to ensure quality and consistency in products that work on the Windows 2000 operating system for users with disabilities.For more information about the "Certified for Microsoft Windows" Logo, including application specifications, see the Application Specification Download link on the Web Resources page at http://windows.microsoft.com/windows2000/reskit/webresources.
Add-on Assistive Devices
Microsoft works with independent manufacturers to produce compatible software and hardware for users with disabilities. One of the purposes of the Active Accessibility technology is to provide an infrastructure that aids the operating system and applications in understanding each other for greater compatibility with these important devices. By using Utility Manager, which is a new feature in Windows 2000, vendors are now able to add their products for easier access.Independent vendors that manufacture specialized assistive devices help people with disabilities to make better use of Windows 2000. Products available from third-party vendors are many and varied and make it possible for people with disabilities to use computers. Some of the kinds of products that are available are the following:
Hardware and software tools that modify the behavior of the mouse and keyboard.Add-on technology, such as the following alternative input devices:
Head-pointer. A device for users who are unable to use standard input devices, such as a mouse or a keyboard. A head-pointer device allows a user to pause the pointer over the command for a specified length of time.Mouthstick. A keyboard input device operated by the mouth that allows a user to activate commands by pressing one key at a time.Single-switch. A device, such as a voice activation, that allows a user to scan or select options or text by using a single switch.Eye-gaze pointer. A device that operates by vision to control an on-screen cursor that allows a user to press on-screen UI elements, such as buttons in dialog boxes, to choose menu options, and to select cells or text.Sip-and-puff device. A device that allows a user to operate a computer by breath control.Voice-activation device. A type of speech recognition device that allows users with disabilities to control computers with their voices instead of with a mouse or keyboard.Alternative keyboards, such as on-screen keyboards, or variously sized or shaped keyboards.
Devices that provide synthesized speech or that print information on the screen by using Braille-embossed printers for people who are blind or have difficulty reading.Word or phrase prediction software that helps users type more quickly and with fewer keystrokes.Closed-captioning devices for users with hearing impairments.Devices that enlarge or alter the color of information on the screen.
IMPORTANT
Most third-party accessibility aids are compatible with specific versions of an operating system. Some add-on utilities can be intrusive because they depend on file formats and programming interfaces to interpret data accurately to the user. Such dependencies change with each new operating system. Therefore, before you decide to upgrade, it is important to take inventory and perform compatibility testing with the new operating system and the applications you plan to use. For more information about emerging technologies and compatibility, see the Microsoft Accessibility link on the Web Resources page at http://windows.microsoft.com/windows2000/reskit/webresources.
Using SerialKeys for Add-on Hardware and Software
The SerialKeys feature is designed for people who are unable to use a standard UI method, such as a keyboard or a mouse. However, SerialKeys also allows an augmentative device to work with the local keyboard and mouse. Users who can point, but not click, can use pointing devices or Morse-code input systems. The interface device sends coded command strings through the computer's serial port to specify keystrokes and mouse events, which are then treated as typical keyboard or mouse input. To enable SerialKeys, double-click Accessibility Options in Control Panel, then click the General tab.If the user is using SerialKeys and the aid stops sending keys successfully, try to do the following:
Make sure that any necessary periods in the key names are included.Send three null (nondisplaying) characters.Reset both the aid and SerialKeys to 300 baud. (If there is a communication difficulty, SerialKeys might automatically reset itself to 300 baud, which makes it unable to communicate with the aid if the aid is ending at a different rate.)SerialKeys uses hardware handshaking (DTR/RTS) and software handshaking (XON/XOFF) to control the flow of characters from the aid. Characters might be lost if the aid ignores these handshaking signals.
Check your hardware vendor's manual for more detailed information.
