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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
OS Versions: Windows CE 1.0 and later.
Header: Keybd.h.
See Also
GetAsyncKeyState | PFN_KEYBD_DRIVER_VKEY_TO_UNICODE | Layout Manager
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