KBD_READCHAR (74h) - CharData Record

CharData Record

The character data structure of the API function KbdCharIn is shown below:

ASCIICharCode (UCHAR)

ASCII character code. The scan code received from the keyboard is translated to the ASCII character code.
ScanCode (UCHAR)
Code received from the keyboard. Scan code received from the keyboard is translated to the ASCII character code.
Status (UCHAR)
State of the keystroke event:

Bits 7-6

Has the following values:

00

Undefined
01
Final character; interim character flag is turned off
10
Interim character
11
Final character; interim character flag is turned on.
Bit 5
If set to 1, immediate conversion requested
Bits 4-2
Reserved
Bit 1
Has the following values:
• Scan code is a character 1
  Scan code is not a character; instead it is an extended key code from the keyboard.
  Bit 0
  If set to 1, shift status returned without a character.
  Reserved (UCHAR)
  NLS shift status. Reserved; must be set to 0.
  ShiftKeyStat (USHORT)
  Shift key status. Values are:

  Bit 15

  SysReq key down
  Bit 14
  Caps Lock key down
  Bit 13
  NumLock key down
  Bit 12
  Scroll Lock key down
  Bit 11
  Right Alt key down
  Bit 10
  Right Ctrl key down
  Bit 9
  Left Alt key down
  Bit 8
  Left Ctrl key down
  Bit 7
  Insert on
  Bit 6
  Caps Lock on
  Bit 5
  NumLock on
  Bit 4
  Scroll Lock on
  Bit 3
  Either Alt key down
  Bit 2
  Either Ctrl key down
  Bit 1
  Left Shift key down
  Bit 0
  Right Shift key down
  Time (ULONG)
  Time stamp indicating when a key was pressed. It is specified in milliseconds from the time the system was started.

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