Casio IT-2000W Technical Reference Manual page 169

Setting ABC (Auto Backlight Control) Status
The ABC (Auto Backlight Control) function is used to sense the ambient light intensity and
automatically turns ON/OFF the backlight. This function is used to enable or disable the ABC
function.
SYNTAX
int SYS_SetABC(int nOnOff);
INPUT
nOnOff = 0
OUTPUT
= 0
= -1
= -2
= -3
OFF
Other than 0 ON
Normal
Parameter error
No response from KBC
VxD not registered
169