PowerWriteACValueIndex function (powersetting.h)

Article
02/22/2024

Sets the AC value index of the specified power setting.

Syntax

DWORD PowerWriteACValueIndex(
  [in, optional] HKEY       RootPowerKey,
  [in]           const GUID *SchemeGuid,
  [in, optional] const GUID *SubGroupOfPowerSettingsGuid,
  [in, optional] const GUID *PowerSettingGuid,
  [in]           DWORD      AcValueIndex
);

Parameters

[in, optional] RootPowerKey

This parameter is reserved for future use and must be set to NULL.

[in] SchemeGuid

The identifier of the power scheme.

[in, optional] SubGroupOfPowerSettingsGuid

The subgroup of power settings. This parameter can be one of the following values defined in WinNT.h. Use NO_SUBGROUP_GUID to refer to the default power scheme.

Value	Meaning
NO_SUBGROUP_GUID fea3413e-7e05-4911-9a71-700331f1c294	Settings in this subgroup are part of the default power scheme.
GUID_DISK_SUBGROUP 0012ee47-9041-4b5d-9b77-535fba8b1442	Settings in this subgroup control power management configuration of the system's hard disk drives.
GUID_SYSTEM_BUTTON_SUBGROUP 4f971e89-eebd-4455-a8de-9e59040e7347	Settings in this subgroup control configuration of the system power buttons.
GUID_PROCESSOR_SETTINGS_SUBGROUP 54533251-82be-4824-96c1-47b60b740d00	Settings in this subgroup control configuration of processor power management features.
GUID_VIDEO_SUBGROUP 7516b95f-f776-4464-8c53-06167f40cc99	Settings in this subgroup control configuration of the video power management features.
GUID_BATTERY_SUBGROUP e73a048d-bf27-4f12-9731-8b2076e8891f	Settings in this subgroup control battery alarm trip points and actions.
GUID_SLEEP_SUBGROUP 238C9FA8-0AAD-41ED-83F4-97BE242C8F20	Settings in this subgroup control system sleep settings.
GUID_PCIEXPRESS_SETTINGS_SUBGROUP 501a4d13-42af-4429-9fd1-a8218c268e20	Settings in this subgroup control PCI Express settings.

[in, optional] PowerSettingGuid

The identifier of the power setting.

[in] AcValueIndex

The AC value index.

Return value

Returns ERROR_SUCCESS (zero) if the call was successful, and a nonzero value if the call failed.

Remarks

Changes to the settings for the active power scheme do not take effect until you call the PowerSetActiveScheme function.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	powersetting.h
Library	PowrProf.lib
DLL	PowrProf.dll