ACCESSTIMEOUT structure (winuser.h)

Article
04/02/2021

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.

Syntax

typedef struct tagACCESSTIMEOUT {
  UINT  cbSize;
  DWORD dwFlags;
  DWORD iTimeOutMSec;
} ACCESSTIMEOUT, *LPACCESSTIMEOUT;

Members

cbSize

Type: UINT

Specifies the size, in bytes, of this structure.

dwFlags

Type: DWORD

A set of bit flags that specify properties of the time-out behavior for accessibility features. The following values are defined.

Value	Meaning
ATF_ONOFFFEEDBACK 0x00000002	If this flag is set, the operating system plays a descending siren sound when the time-out period elapses and the accessibility features are turned off.
ATF_TIMEOUTON 0x00000001	If this flag is set, a time-out period has been set for accessibility features. If this flag is not set, the features will not time out even though a time-out period is specified.

iTimeOutMSec

Type: DWORD

Specifies the time-out period, in milliseconds.

Remarks

Use an ACCESSTIMEOUT structure when calling the SystemParametersInfo function with the uiAction parameter set to the SPI_GETACCESSTIMEOUT or SPI_SETACCESSTIMEOUT value. When using SPI_GETACCESSTIMEOUT, you must specify the cbSize member of the ACCESSTIMEOUT structure; the SystemParametersInfo function fills in the remaining members. Specify all structure members when using the SPI_SETACCESSTIMEOUT value.

Requirements


Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	winuser.h (include Windows.h)