Light Control Functions

Use these functions to control the backlight for the screen and keypad on the computer.

ITCSetKeyboardLight is supported by all computers with a backlit keypad.

Screen-related functions are supported by all computers with a backlit LCD screen. Light control functions that return an HRESULT will return ITC_ERROR_FUNCTION_NOT_SUPPORTED when executed on computers without a backlit screen.

See your computer user manual for more information on its backlight capability.

ITCSetKeyboardLight Turns on the keypad backlight.
ITCGetMaxScreenBrightness Returns the maximum brightness level.
ITCGetScreenBrightness Returns the brightness level associated with the current power source.
ITCSetScreenBrightness Sets the brightness level to be associated with the current power source.
ITCGetScreenBrightnessAcDc Returns the brightness level associated with the specified power source.
ITCSetScreenBrightnessAcDc Sets the brightness level to be associated with a specified power source.
ITCGetScreenLight Returns the current state of the backlight.
ITCSetScreenLight Turns the backlight on or off.
ITCGetScreenLightEnableOnUserAction Returns the current state of the auto-sense light-on feature.
ITCSetScreenLightEnableOnUserAction Enables or disables the auto-sense light-on feature.
ITCGetScreenLightEnableRestoreOnPowerUp Returns the enabled/disabled state of LCD light restore-on-power-up.
ITCSetScreenLightEnableRestoreOnPowerUp Sets the enabled/disabled state of LCD light restore-on-power-up.
ITCGetScreenLightTimeout Returns the backlight inactivity timeout.
ITCSetScreenLightTimeout Sets the backlight inactivity timeout.

Header and Library Files

Header File: ITC50.H

Library: ITC50.LIB

More Information

C++ Reference: Device Functions