NTSTATUS NtSetSystemPowerState( IN POWER_STATE SystemPowerState, IN BOOLEAN NoResumeAlarm, IN BOOLEAN ForcePowerDown ); Routine Description: This routine is invoked to suspend or hibernate the system. If the system can not currently support a suspend or hibernate then an error is returned. Suspend/Hibernate support requires that all currently loaded driver have power management support. This call requires system Shutdown access. Arguments: NoResumeAlarm - If TRUE, then the system will be suspended or hibernated without setting any resume alarm. This should be used in the case of a critical low battery. ForcePowerDown - If FALSE , then the devices are first sent a SET_POWER-Query. If all power off queries succeed then devices are sent a SET_POWER to suspend or hibernate; otherwise an error is returned. Return Value: Success - System was hibernated and has been resumed error - Neither suspend nor hibernate did not occur due to the reported error.