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KEY_STATE_FLAGS (Windows Embedded CE 6.0)

1/6/2010

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
Windows Embedded CE Windows CE 1.0 and later

See Also

Reference

Keyboard Driver DDI Data Types
PFN_KEYBD_DRIVER_VKEY_TO_UNICODE

Concepts

Layout Manager

Other Resources

GetAsyncKeyState