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KEYBOARD_UNIT_ID_PARAMETER structure (ntddkbd.h)

  • Article

KEYBOARD_UNIT_ID_PARAMETER specifies the unit ID that Kbdclass assigns to a keyboard.

Syntax

typedef struct _KEYBOARD_UNIT_ID_PARAMETER {
  USHORT UnitId;
} KEYBOARD_UNIT_ID_PARAMETER, *PKEYBOARD_UNIT_ID_PARAMETER;

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.

Remarks

Although this structure is used with IOCTL_KEYBOARD_QUERY_Xxx requests, Kbdclass does not use the UnitId value.

Requirements

Requirement Value
Header ntddkbd.h (include Ntddkbd.h)

See also

IOCTL_KEYBOARD_QUERY_ATTRIBUTES

IOCTL_KEYBOARD_QUERY_INDICATORS

IOCTL_KEYBOARD_QUERY_INDICATOR_TRANSLATION

IOCTL_KEYBOARD_QUERY_TYPEMATIC