private static extern int SetDevicePower(

    Private Shared Function SetDevicePower(ByVal pvDevice As String, ByVal dwDeviceFlags As Integer, ByVal DeviceState As DevicePowerState) As Integer

SetDevicePower("BKL1:", POWER_NAME, DevicePowerState.D4);

SetDevicePower("BKL1:", POWER_NAME, DevicePowerState.D0);