TOGGLEKEYS

The TOGGLEKEYS structure 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.

typedef struct tagTOGGLEKEYS {     // tk 
    DWORD cbSize; 
    DWORD dwFlags; 
} TOGGLEKEYS; 
 

Members

cbSize

Specifies the size, in bytes, of this structure.

dwFlags

A set of bit flags that specify properties of the ToggleKeys feature. The following bit flag values are defined:

Value	Meaning
TKF_AVAILABLE	If this flag is set, the ToggleKeys feature is available.
TKD_CONFIRMHOTKEY	Windows 95, Windows NT 5.0, and later: A confirmation dialog box appears when the ToggleKeys feature is activated by using the hot key.
TKF_HOTKEYACTIVE	If this flag is set, the user can turn the ToggleKeys feature on and off by holding down the num lock key for eight seconds.
TKF_HOTKEYSOUND	If this flag is set, the system plays a siren sound when the user turns the ToggleKeys feature on or off by using the hot key.
TKF_TOGGLEKEYSON	If this flag is set, the ToggleKeys feature is on.

Remarks

An application uses a TOGGLEKEYS structure when calling the SystemParametersInfo function with the wAction parameter set to SPI_GETTOGGLEKEYS or SPI_SETTOGGLEKEYS. When using SPI_GETTOGGLEKEYS, an application must specify the cbSize member of the TOGGLEKEYS structure; the SystemParametersInfo function fills the remaining members. An application must specify all structure members when using the SETTOGGLEKEYS value.

QuickInfo

  Windows NT: Requires version 3.5 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in winuser.h.

See Also

Accessibility Overview, Accessibility Structures, SystemParametersInfo