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KEYBOARD_TYPEMATIC_PARAMETERS structure (ntddkbd.h)

  • Article

KEYBOARD_TYPEMATIC_PARAMETERS specifies a keyboard's typematic settings.

Syntax

typedef struct _KEYBOARD_TYPEMATIC_PARAMETERS {
  USHORT UnitId;
  USHORT Rate;
  USHORT Delay;
} KEYBOARD_TYPEMATIC_PARAMETERS, *PKEYBOARD_TYPEMATIC_PARAMETERS;

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.

Rate

Specifies the rate at which character output from a keyboard repeats, in characters per second, after a key is pressed and continuously held down. The minimum possible value is KEYBOARD_TYPEMATIC_RATE_MINIMUM and the maximum possible value is KEYBOARD_TYPEMATIC_RATE_MAXIMUM. The default value is KEYBOARD_TYPEMATIC_RATE_DEFAULT.

Delay

Specifies the amount of time that must elapse, in milliseconds, after a key is pressed and continuously held down, before the character output from a keyboard begins to repeat. The minimum possible delay is KEYBOARD_TYPEMATIC_DELAY_MINIMUM and the maximum possible delay is KEYBOARD_TYPEMATIC_DELAY_MAXIMUM. The default value is KEYBOARD_TYPEMATIC_DELAY_DEFAULT.

Remarks

This structure is used with IOCTL_KEYBOARD_QUERY_TYPEMATIC and IOCTL_KEYBOARD_SET_TYPEMATIC requests to query and set a keyboard's typematic settings.

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

IOCTL_KEYBOARD_SET_INDICATORS

IOCTL_KEYBOARD_SET_TYPEMATIC

KEYBOARD_UNIT_ID_PARAMETER