KEY_STATE_FLAGS (Compact 2013)
3/26/2014
This data type contains flags for keyboard events and the SHIFT state.
typedef UINT32 KEY_STATE_FLAGS;
Remarks
The low-order bits keep track of a key state. This enables you to use 256 UINT8s for the key state array. The upper bits keep track of SHIFT state on a key-by-key basis. The PFN_KEYBD_DRIVER_VKEY_TO_UNICODE function sets the CTRL, ALT, SHIFT and CAPS LOCK flags to encapsulate the SHIFT state when the character was generated.
The following table shows the defined KEY_STATE_FLAGS.
Value |
Description |
|---|---|
KeyStateToggledFlag |
The key is toggled. |
KeyStateGetAsyncDownFlag |
The key was pressed since the last GetAsyncKeyState call. |
KeyStateReserved4 |
Reserved. |
KeyStateReserved8 |
Reserved. |
KeyStateReserved10 |
Reserved. |
KeyStateReserved20 |
Reserved. |
KeyStatePrevDownFlag |
The key was previously pressed. |
KeyStateDownFlag |
The key is currently pressed. This value is internal to the driver. It identifies key-up and key-down events. |
KeyStateKeyEventFlag |
This value is internal to the driver. |
KeyShiftAnyCtrlFlag |
The left CTRL key or right CTRL key is pressed. |
KeyShiftAnyShiftFlag |
The left SHIFT key or right SHIFT key is pressed. |
KeyShiftAnyAltFlag |
The left ALT key or right ALT key is pressed. |
KeyShiftCapitalFlag |
The CAPS LOCK key is toggled. |
KeyShiftLeftCtrlFlag |
The left CTRL key is pressed. |
KeyShiftLeftShiftFlag |
The left SHIFT key is pressed. |
KeyShiftLeftAltFlag |
The left ALT key is pressed. |
KeyShiftLeftWinFlag |
The left Windows logo key is pressed. |
KeyShiftRightCtrlFlag |
The right CTRL key is pressed. |
KeyShiftRightShiftFlag |
The right SHIFT key is pressed. |
KeyShiftRightAltFlag |
The right ALT key is pressed. |
KeyShiftRightWinFlag |
The right Windows logo key is pressed. |
KeyShiftReserved40000 |
Reserved. |
KeyShiftDeadFlag |
A dead character was generated. This value is set by the KeybdDriverVKeyToUnicode function. |
KeyShiftNoCharacterFlag |
There is no valid character to generate for the specified virtual-key code event. This value is set by the KeybdDriverVKeyToUnicode function. This value can be set on a key-up event or if a key changes only its SHIFT state. |
KeyShiftLanguageFlag1 |
Language-specific SHIFT keys. |
KeyShiftKeybdEventFlag |
This value is internal to the driver. |
KeyShiftUseVKNullFlag |
This value is internal to the driver. |
KeyShiftNumLockFlag |
The NUM LOCK key is in a toggled state. |
KeyShiftScrollLockFlag |
The SCROLL LOCK key is in a toggled state. |
KeyShiftReserved400 |
Reserved. |
KeyShiftReserved200 |
Reserved. |
KeyShiftReserved100 |
Reserved. |
KeyShiftKanaFlag |
Japanese keyboard. KANA LOCK is toggled. |
Requirements
Header |
keybd.h |
See Also
Reference
Keyboard Driver DDI Data Types
PFN_KEYBD_DRIVER_VKEY_TO_UNICODE