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KEYBOARD_INPUT_DATA structure (ntddkbd.h)
KEYBOARD_INPUT_DATA contains one packet of keyboard input data.
Syntax
typedef struct _KEYBOARD_INPUT_DATA {
USHORT UnitId;
USHORT MakeCode;
USHORT Flags;
USHORT Reserved;
ULONG ExtraInformation;
} KEYBOARD_INPUT_DATA, *PKEYBOARD_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.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddkbd.h (include Ntddkbd.h) |
See also
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