[DllImport("PowrProf.dll", SetLastError=true)]
public static extern uint PowerReadDCValueIndex(IntPtr RootPowerKey, IntPtr SchemeGuid, IntPtr SubGroupOfPowerSettingGuid, IntPtr PowerSettingGuid, ref UInt32 DcValueIndex);
Declare Function PowerReadDCValueIndex Lib "powrprof.dll" (TODO) As TODO