CM_KEYBOARD_DEVICE_DATA structure (wdm.h)
The CM_KEYBOARD_DEVICE_DATA structure defines a device-type-specific data record that is stored in the \Registry\Machine\Hardware\Description tree for a keyboard peripheral if the system can collect this information during the boot process.
Syntax
typedef struct _CM_KEYBOARD_DEVICE_DATA {
USHORT Version;
USHORT Revision;
UCHAR Type;
UCHAR Subtype;
USHORT KeyboardFlags;
} CM_KEYBOARD_DEVICE_DATA, *PCM_KEYBOARD_DEVICE_DATA;
Members
Version
The version number of this structure.
Revision
The revision of this structure.
Type
The type of the keyboard.
Subtype
The subtype of the keyboard.
KeyboardFlags
Defined by x86 BIOS INT 16h, function 02 as:
| Bit | Defined As |
|---|---|
| 7 | Insert on. |
| 6 | Caps Lock on. |
| 5 | Num Lock on. |
| 4 | Scroll Lock on. |
| 3 | Alt Key is down. |
| 2 | Ctrl Key is down. |
| 1 | Left shift key is down. |
| 0 | Right shift key is down. |
Requirements
| Requirement | Value |
|---|---|
| Header | wdm.h (include Wdm.h, Ntddk.h, Ntifs.h) |