The VPOWERD services let other virtual devices determine the power management capabilities of the system, check the current system power status, set the system power management level or device power state, and set a power handler. There are these VPOWERD services:
_VPOWERD_Deregister_Power_Handler
_VPOWERD_Get_APM_BIOS_Version
_VPOWERD_Get_Power_State
_VPOWERD_Get_Power_Management_Level
_VPOWERD_Get_Power_Status
_VPOWERD_Get_Version
_VPOWERD_OEM_APM_Function
_VPOWERD_Register_Power_Handler
_VPOWERD_Restore_Power_On_Defaults
_VPOWERD_Set_Device_Power_State
_VPOWERD_Set_Power_Management_Level
_VPOWERD_Set_System_Power_State