The STICKYKEYS structure 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. Pressing a modifier key once latches the key down until the user presses a non-modifier key or clicks a mouse button. Pressing a modifier key twice locks the key until the user presses the key a third time.

typedef struct tagSTICKYKEYS {
    DWORD  cbSize; 
    DWORD  dwFlags; 
} STICKYKEYS, *LPSTICKYKEYS;  

Members

cbSize

Specifies the size, in bytes, of this structure.

dwFlags

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

Value	Meaning
SKF_AUDIBLEFEEDBACK	If this flag is set, the system plays a sound when the user latches, locks, or releases modifier keys using the StickyKeys feature.
SKF_AVAILABLE	If this flag is set, the StickyKeys feature is available.
SKF_CONFIRMHOTKEY	Windows 95/98, Windows 2000: A confirmation dialog appears when the StickyKeys feature is activated by using the hot key.
SKF_HOTKEYACTIVE	If this flag is set, the user can turn the StickyKeys feature on and off by pressing the SHIFT key five times.
SKF_HOTKEYSOUND	If this flag is set, the system plays a siren sound when the user turns the StickyKeys feature on or off by using the hot key.
SKF_INDICATOR	Windows 95/98, Windows 2000: A visual indicator should be displayed when the StickyKeys feature is on.
SKF_STICKYKEYSON	If this flag is set, the StickyKeys feature is on.
SKF_TRISTATE	If this flag is set, pressing a modifier key twice in a row locks down the key until the user presses it a third time.
SKF_TWOKEYSOFF	If this flag is set, releasing a modifier key that has been pressed in combination with any other key turns off the StickyKeys feature.
SKF_LALTLATCHED	Windows 98, Windows 2000: The left ALT key is latched.
SKF_LCTLLATCHED	Windows 98, Windows 2000: The left CTRL key is latched.
SKF_LSHIFTLATCHED	Windows 98, Windows 2000: The left SHIFT key is latched.
SKF_RALTLATCHED	Windows 98, Windows 2000: The right ALT key is latched.
SKF_RCTLLATCHED	Windows 98, Windows 2000: The right CTRL key is latched.
SKF_RSHIFTLATCHED	Windows 98, Windows 2000: The right SHIFT key is latched.
SKF_LALTLOCKED	Windows 98, Windows 2000: The left ALT key is locked.
SKF_LCTLLOCKED	Windows 98, Windows 2000: The left CTRL key is locked.
SKF_LSHIFTLOCKED	Windows 98, Windows 2000: The left SHIFT key is locked.
SKF_RALTLOCKED	Windows 98, Windows 2000: The right ALT key is locked.
SKF_RCTLLOCKED	Windows 98, Windows 2000: The right CTRL key is locked.
SKF_RSHIFTLOCKED	Windows 98, Windows 2000: The right SHIFT key is locked.
SKF_LWINLATCHED	Windows 98, Windows 2000: The left Windows key is latched.
SKF_RWINLATCHED	Windows 98, Windows 2000: The right Windows key is latched.
SKF_LWINLOCKED	Windows 98, Windows 2000: The left Windows key is locked.
SKF_RWINLOCKED	Windows 98, Windows 2000: The right Windows key is locked.

Remarks

An application uses a STICKYKEYS structure when calling the SystemParametersInfo function with the uiAction parameter set to SPI_GETSTICKYKEYS or SPI_SETSTICKYKEYS. When using SPI_GETSTICKYKEYS, you must specify the cbSize member of the STICKYKEYS structure; the SystemParametersInfo function fills the remaining members. You must specify all structure members when using the SPI_SETSTICKYKEYS value.

If you call SystemParametersInfo with the SPI_SETSTICKYKEYS value, the following flags are ignored:

SKF_LALTLATCHED
SKF_LCTLLATCHED
SKF_LSHIFTLATCHED
SKF_RALTLATCHED
SKF_RCTLLATCHED
SKF_RSHIFTLATCHED
SKF_LALTLOCKED
SKF_LCTLLOCKED
SKF_LSHIFTLOCKED
SKF_RALTLOCKED
SKF_RCTLLOCKED
SKF_RSHIFTLOCKED

Requirements

  Windows NT/2000/XP: Included in Windows NT 3.5 or later.
  Windows 95/98/Me: Included in Windows 95 or later.
  Header: Declared in Winuser.h; include Windows.h.

See Also

Accessibility Structures, SystemParametersInfo