RegisterPowerSettingNotification function

Registers the application to receive power setting notifications for the specific power setting event.

Syntax

HPOWERNOTIFY RegisterPowerSettingNotification(
  IN HANDLE  hRecipient,
  IN LPCGUID PowerSettingGuid,
  IN DWORD   Flags
);

Parameters

hRecipient

Handle indicating where the power setting notifications are to be sent. For interactive applications, the Flags parameter should be zero, and the hRecipient parameter should be a window handle. For services, the Flags parameter should be one, and the hRecipient parameter should be a SERVICE_STATUS_HANDLE as returned from RegisterServiceCtrlHandlerEx.

PowerSettingGuid

The GUID of the power setting for which notifications are to be sent. For more information see Registering for Power Events.

Flags

Value Meaning
DEVICE_NOTIFY_WINDOW_HANDLE
0
Notifications are sent using WM_POWERBROADCAST messages with a wParam parameter of PBT_POWERSETTINGCHANGE.
DEVICE_NOTIFY_SERVICE_HANDLE
1
Notifications are sent to the HandlerEx callback function with a dwControl parameter of SERVICE_CONTROL_POWEREVENT and a dwEventType of PBT_POWERSETTINGCHANGE.

Return value

Returns a notification handle for unregistering for power notifications. If the function fails, the return value is NULL. To get extended error information, call GetLastError.

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Target Platform Windows
Header winuser.h (include Windows.h)
Library User32.lib
DLL User32.dll

See also

Power Management Functions

Registering for Power Events

UnregisterPowerSettingNotification