Intel Extensible Firmware Interface - Manual (Page 300)

Extensible Firmware Interface Specification
10-6 12/01/02 Version 1.10
SIMPLE_INPUT.ReadKeyStroke()
Summary
Reads the next keystroke from the input device.
Prototype
EFI_STATUS
(EFIAPI *EFI_INPUT_READ_KEY) (
IN SIMPLE_INPUT_INTERFACE *This,
OUT EFI_INPUT_KEY *Key
);
Parameters
This A pointer to the SIMPLE_INPUT_INTERFACE instance. Type
SIMPLE_INPUT_INTERFACE is defined in Section 10.2.
Key A pointer to a buffer that is filled in with the keystroke
information for the key that was pressed. Type
EFI_INPUT_KEY is defined in “Related Definitions” below.
Related Definitions
//*******************************************************
// EFI_INPUT_KEY
//*******************************************************
typedef struct {
UINT16 ScanCode;
CHAR16 UnicodeChar;
} EFI_INPUT_KEY;