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STICKYKEYS structure (winuser.h)

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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.

Syntax

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

Members

cbSize

Type: DWORD

Specifies the size, in bytes, of this structure.

dwFlags

Type: DWORD

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

Value Meaning
SKF_AUDIBLEFEEDBACK
0x00000040
 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
0x00000002
 If this flag is set, the StickyKeys feature is available.
SKF_CONFIRMHOTKEY
0x00000008
 Windows 95/98, Windows 2000: A confirmation dialog appears when the StickyKeys feature is activated by using the hot key.
SKF_HOTKEYACTIVE
0x00000004
 If this flag is set, the user can turn the StickyKeys feature on and off by pressing the SHIFT key five times.
SKF_HOTKEYSOUND
0x00000010
 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
0x00000020
 Windows 95/98, Windows 2000: A visual indicator should be displayed when the StickyKeys feature is on.
SKF_STICKYKEYSON
0x00000001
 If this flag is set, the StickyKeys feature is on.
SKF_TRISTATE
0x00000080
 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
0x00000100
 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
0x10000000
 Windows 98, Windows 2000: The left ALT key is latched.
SKF_LCTLLATCHED
0x04000000
 Windows 98, Windows 2000: The left CTRL key is latched.
SKF_LSHIFTLATCHED
0x01000000
 Windows 98, Windows 2000: The left SHIFT key is latched.
SKF_RALTLATCHED
0x20000000
 Windows 98, Windows 2000: The right ALT key is latched.
SKF_RCTLLATCHED
0x08000000
 Windows 98, Windows 2000: The right CTRL key is latched.
SKF_RSHIFTLATCHED
0x02000000
 Windows 98, Windows 2000: The right SHIFT key is latched.
SKF_LALTLOCKED
0x00100000
 Windows 98, Windows 2000: The left ALT key is locked.
SKF_LCTLLOCKED
0x00040000
 Windows 98, Windows 2000: The left CTRL key is locked.
SKF_LSHIFTLOCKED
0x00010000
 Windows 98, Windows 2000: The left SHIFT key is locked.
SKF_RALTLOCKED
0x00200000
 Windows 98, Windows 2000: The right ALT key is locked.
SKF_RCTLLOCKED
0x00080000
 Windows 98, Windows 2000: The right CTRL key is locked.
SKF_RSHIFTLOCKED
0x00020000
 Windows 98, Windows 2000: The right SHIFT key is locked.
SKF_LWINLATCHED
0x40000000
 Windows 98, Windows 2000: The left Windows key is latched.
SKF_RWINLATCHED
0x80000000
 Windows 98, Windows 2000: The right Windows key is latched.
SKF_LWINLOCKED
0x00400000
 Windows 98, Windows 2000: The left Windows key is locked.
SKF_RWINLOCKED
0x00800000
 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

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

See also

Accessibility Structures

SystemParametersInfo