P/INVOKE 如何封装SetInformationJobObject()?

Question

[StructLayout(LayoutKind.Sequential)]
    public struct JOBOBJECT_BASIC_LIMIT_INFORMATION
    {
        public long PerProcessUserTimeLimit;
        public long PerJobUserTimeLimit;
        public LimitFlags LimitFlags;
        public uint MinimumWorkingSetSize;
        public uint MaximumWorkingSetSize;
        public int ActiveProcessLimit;
        public UIntPtr Affinity;
        public int PriorityClass;
        public int SchedulingClass;
    }

    public enum LimitFlags
    {
        JOB_OBJECT_LIMIT_ACTIVE_PROCESS = 0x00000008,
        JOB_OBJECT_LIMIT_AFFINITY = 0x00000010,
        JOB_OBJECT_LIMIT_BREAKAWAY_OK = 0x00000800,
        JOB_OBJECT_LIMIT_DIE_ON_UNHANDLED_EXCEPTION = 0x00000400,
        JOB_OBJECT_LIMIT_JOB_MEMORY = 0x00000200,
        JOB_OBJECT_LIMIT_JOB_TIME = 0x00000004,
        JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE = 0x00002000,
        JOB_OBJECT_LIMIT_PRESERVE_JOB_TIME = 0x00000040,
        JOB_OBJECT_LIMIT_PRIORITY_CLASS = 0x00000020,
        JOB_OBJECT_LIMIT_PROCESS_MEMORY = 0x00000100,
        JOB_OBJECT_LIMIT_PROCESS_TIME = 0x00000002,
        JOB_OBJECT_LIMIT_SCHEDULING_CLASS = 0x00000080,
        JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK = 0x00001000,
        JOB_OBJECT_LIMIT_WORKINGSET = 0x00000001
    }

    public enum JOBOBJECTINFOCLASS
    {
        JobObjectAssociateCompletionPortInformation = 7,
        JobObjectBasicLimitInformation = 2,
        JobObjectBasicUIRestrictions = 4,
        JobObjectEndOfJobTimeInformation = 6,
        JobObjectExtendedLimitInformation = 9,
        JobObjectSecurityLimitInformation = 5
    }

[DllImport("kernel32.dll")]
        public static extern bool SetInformationJobObject(IntPtr hJob, JOBOBJECTINFOCLASS JobObjectInfoClass, JOBOBJECT_BASIC_LIMIT_INFORMATION lpJobObjectInfo, uint cbJobObjectInfoLength);

这样对吗？为什么调用时会报错误24.命令长度不对？

JOBOBJECT_BASIC_LIMIT_INFORMATION limits = new JOBOBJECT_BASIC_LIMIT_INFORMATION();
            if (!NativeMethods.SetInformationJobObject(this.jobHandle, JOBOBJECTINFOCLASS.JobObjectBasicLimitInformation, limits, 48))
            {
               int b = NativeMethods.GetLastError();
                throw new Exception("Error "+b.ToString());
            }

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lehope