Accessibility Structures

This section describes the structures used to implement Windows accessibility features.

In this section

Structure Description
Contains information about the time-out period associated with the Microsoft Win32 accessibility features.
The accessibility time-out period is the length of time that must pass without keyboard and mouse input before the operating system automatically turns off accessibility features. The accessibility time-out is designed for computers that are shared by several users so that options selected by one user do not inconvenience a subsequent user.
The accessibility features affected by the time-out are the FilterKeys features (SlowKeys, BounceKeys, and RepeatKeys), MouseKeys, ToggleKeys, and StickyKeys. The accessibility time-out also affects the high contrast mode setting.
Contains information about the FilterKeys accessibility feature, which enables a user with disabilities to set the keyboard repeat rate (RepeatKeys), acceptance delay (SlowKeys), and bounce rate (BounceKeys).
Contains information about the high contrast accessibility feature.
Contains information about the MouseKeys accessibility feature. When the MouseKeys feature is active, the user can use the numeric keypad to control the mouse pointer, and to click, double-click, drag, and drop. By pressing NUMLOCK, the user can toggle the numeric keypad between mouse control mode and normal operation.
Contains information about the SerialKeys accessibility feature, which interprets data from a communication aid attached to a serial port as commands causing the system to simulate keyboard and mouse input.
Contains information about the SoundSentry accessibility feature. When the SoundSentry feature is on, the computer displays a visual indication only when a sound is generated.
Contains information about the StickyKeys accessibility feature. When the StickyKeys feature is on, the user can press a modifier key (SHIFT, CTRL, or ALT) and then another key in sequence rather than at the same time, to enter shifted (modified) characters and other key combinations.
Contains information about the ToggleKeys accessibility feature. When the ToggleKeys feature is on, the computer emits a high-pitched tone whenever the user turns on the CAPS LOCK, NUM LOCK, or SCROLL LOCK key, and a low-pitched tone whenever the user turns off one of those keys.

Windows Accessibility Features