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TOGGLEKEYS

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This structure contains information about the toggle keys accessibility option. When the toggle keys option is on, the device emits a high-pitched sound whenever the user turns on the CAPS LOCK, NUM LOCK, or SCROLL LOCK key and emits a low-pitched sound whenever the user turns off one of those keys.

typedef struct tagTOGGLEKEYS{
  UINT cbSize;
  DWORD dwFlags;
} TOGGLEKEYS, *LPTOGGLEKEYS;

Members

  • cbSize
    Unsigned integer that specifies the size, in bytes, of this structure.
  • dwFlags
    DWORD that contains a set of bit flags that specify properties for the toggle keys option. The following table shows the possible values.
    Value Description
    TKF_AVAILABLE The toggle keys option is available for use.
    TKF_HOTKEYACTIVE The user can turn the toggle keys option on and off by holding down the NUM LOCK key for 8 seconds.
    TKF_HOTKEYSOUND The system plays a siren sound when the user turns the toggle keys option on or off by using the hot key.
    TKF_TOGGLEKEYSON The toggle keys option is on.

Remarks

Use a TOGGLEKEYS structure when you call the SystemParametersInfo function with the wAction parameter set to SPI_GETTOGGLEKEYS or SPI_SETTOGGLEKEYS. When using SPI_GETTOGGLEKEYS, you must specify the cbSize member of the TOGGLEKEYS structure; the SystemParametersInfo function fills in the remaining members. Specify all structure members when using the SPI_SETTOGGLEKEYS value.

Requirements

OS Versions: Windows CE .NET 4.0 and later.
Header: Windows.h.

See Also

SystemParametersInfo | Enabling Toggle Keys | Accessibility Structures

 Last updated on Thursday, April 08, 2004

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