_VPOWERD_Get_Power_Management_Level
DWORD _VPOWERD_Get_Power_Management_Level(VOID);
Retrieves the power management level of the system.
Returns one of these values:
PMLEVEL_OFF
Power management off.
PMLEVEL_STANDARD
BIOS power management on.
PMLEVEL_ADVANCED
Both BIOS and cooperative power management on.