ntpoapi.h header

This header contains functions and data structures that an application can use power management. For more information, see:

• About Power Management

ntpoapi.h contains the following programming interfaces:

Functions

NtPowerInformation Learn how the ZwPowerInformation routine sets or retrieves system power information.

Structures

BATTERY_REPORTING_SCALE Battery miniclass drivers fill in this structure in response to certain BatteryMiniQueryInformation requests.
CM_POWER_DATA The CM_POWER_DATA structure contains information about a device's power management state and capabilities.
COUNTED_REASON_CONTEXT The COUNTED_REASON_CONTEXT structure contains one or more strings that give reasons for a power request.
PO_SPR_ACTIVE_SESSION_DATA Allow drivers to register/unregister for SPR Active session start and end notifications.
POWER_LIMIT_ATTRIBUTES Describes the attributes of each power limit type.
POWER_LIMIT_VALUE Describes the specific power limit value to be updated for a certain power limit.
POWER_MONITOR_INVOCATION
POWER_PLATFORM_INFORMATION The POWER_PLATFORM_INFORMATION structure contains information about the power capabilities of the system.
POWER_SESSION_ALLOW_EXTERNAL_DMA_DEVICES Learn more about POWER_SESSION_ALLOW_EXTERNAL_DMA_DEVICES
POWER_STATE The POWER_STATE union specifies a system power state value or a device power state value.
SYSTEM_POWER_STATE_CONTEXT The SYSTEM_POWER_STATE_CONTEXT structure is a partially opaque system structure that contains information about the previous system power states of a computer.

Enumerations

DEVICE_POWER_STATE The DEVICE_POWER_STATE enumeration type indicates a device power state.
MONITOR_DISPLAY_STATE Indicates the power state of the monitor being displayed on.
PO_INTERNAL_WAKE_SOURCE_TYPE Learn more about: PO_INTERNAL_WAKE_SOURCE_TYPE enumeration
POWER_ACTION The POWER_ACTION enumeration identifies the system power actions that can occur on a computer.
POWER_INFORMATION_LEVEL Indicates power level information.
POWER_LIMIT_TYPES Enumerates power limit types that describe a throttled object (power or battery discharge current) and how long the throttled object can last.
POWER_MONITOR_REQUEST_REASON Defines values for power transitions reasons for a monitor.
POWER_REQUEST_TYPE The POWER_REQUEST_TYPE enumeration indicates the power request type.
POWER_STATE_TYPE The POWER_STATE_TYPE enumeration type indicates that a power state value is a system power state or a device power state.
SYSTEM_POWER_STATE The SYSTEM_POWER_STATE enumeration type is used to indicate a system power state.