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4/8/2010

This structure contains information about the time-out period associated with the accessibility options. This time-out period is the length of time that must pass without keyboard, mouse, or touch input before the operating system (OS) automatically turns off the accessibility options. The accessibility options that the time-out affects are mouse keys, toggle keys, high-contrast mode, and sticky keys. Use the accessibility time-out on devices that several users share so that options selected by one user do not inconvenience a subsequent user.

Syntax 

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

Members

cbSize

Unsigned integer that specifies the size, in bytes, of this structure.

dwFlags

DWORDthat contains a set of bit flags that specify properties of the time-out option. The following table shows the possible values.

Value Description

ATF_AVAILABLE

The accessibility time-out option is available for use. An application can retrieve this value but cannot set it.

ATF_ONOFFFEEDBACK

The OS plays a descending siren sound when the time-out period elapses and the OS turns off the accessibility options.

ATF_TIMEOUTON

A time-out period is set for accessibility options. If this flag is not set, the options do not time out even if an application specifies a time-out period.
iTimeOutMSec

DWORDthat specifies the length of the time-out period, in milliseconds.

Remarks

Use an ACCESSTIMEOUTstructure when you call the SystemParametersInfofunction with the uiActionparameter set to the SPI_GETACCESSTIMEOUT or SPI_SETACCESSTIMEOUT value. When using SPI_GETACCESSTIMEOUT, you must specify the cbSizemember of the ACCESSTIMEOUTstructure; the SystemParametersInfofunction fills in the remaining members. Specify all structure members when using the SPI_SETACCESSTIMEOUT value.

Requirements

Header winuser.h
Windows Embedded CE Windows CE .NET 4.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also

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