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Power Management Control Codes

The following control codes are used with batteries.

Control CodeDescription
IOCTL_BATTERY_QUERY_INFORMATION Retrieves a variety of information for the battery
IOCTL_BATTERY_QUERY_STATUS Retrieves the current status for the battery.
IOCTL_BATTERY_QUERY_TAG Retrieves the battery's current tag.
IOCTL_BATTERY_SET_INFORMATION Sets various battery information.


The following control codes are part of the backlight control interface.

Control CodeDescription
IOCTL_VIDEO_QUERY_DISPLAY_BRIGHTNESS Retrieves the current AC and DC backlight levels and the current power state.
IOCTL_VIDEO_QUERY_SUPPORTED_BRIGHTNESS Retrieves the supported backlight levels.
IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESS Sets the current AC and DC backlight levels