KEYBOARD_INPUT_DATA - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntddkbd.h

typedef struct _KEYBOARD_INPUT_DATA {
  USHORT UnitId;
  USHORT MakeCode;
  USHORT Flags;
  USHORT Reserved;
  ULONG  ExtraInformation;
} KEYBOARD_INPUT_DATA, *PKEYBOARD_INPUT_DATA;
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Win32 API reference (ns-ntddkbd-keyboard_input_data)

KEYBOARD_INPUT_DATA structure

Description

KEYBOARD_INPUT_DATA contains one packet of keyboard input data.

Members

UnitId

Specifies the unit number of a keyboard device. A keyboard device name has the format \Device\KeyboardPortN, where the suffix N is the unit number of the device. For example, a device, whose name is \Device\KeyboardPort0, has a unit number of zero, and a device, whose name is \Device\KeyboardPort1, has a unit number of one.

MakeCode

Specifies the scan code associated with a key press.

Flags

Specifies a bitwise OR of one or more of the following flags that indicate whether a key was pressed or released, and other miscellaneous information.

Value Meaning
KEY_MAKE The key was pressed.
KEY_BREAK The key was released.
KEY_E0 Extended scan code used to indicate special keyboard functions.
KEY_E1 Extended scan code used to indicate special keyboard functions.

Reserved

Reserved for operating system use.

ExtraInformation

Specifies device-specific information associated with a keyboard event.

Remarks

In response to an IRP_MJ_READ (Kbdclass) request, Kbdclass transfers zero or more KEYBOARD_INPUT_DATA structures from its internal data queue to the Win32 subsystem buffer.

See also

IRP_MJ_READ (Kbdclass)

KeyboardClassServiceCallback

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