SetInformationJobObject使用ERROR_PRIVILEGE_NOT_HELD

Question

我想为子进程设置优先级，但是SetInformationJobObject函数有1314错误代码。那么如何解决这个问题？

#include <windows.h>
#include <iostream>
using namespace std;

int main() {
    JOBOBJECT_BASIC_LIMIT_INFORMATION limits;
    limits.LimitFlags = JOB_OBJECT_LIMIT_PRIORITY_CLASS;
    limits.PriorityClass = HIGH_PRIORITY_CLASS;

    HANDLE Job = CreateJobObject(NULL, NULL);

    SetInformationJobObject(Job, JobObjectBasicLimitInformation, &limits, sizeof(limits));
    cout << GetLastError() << endl;
    AssignProcessToJobObject(Job, GetCurrentProcess());

    STARTUPINFO cif;
    ZeroMemory(&cif, sizeof(STARTUPINFO));
    cif.cb = sizeof(STARTUPINFO);
    PROCESS_INFORMATION pi;
    CreateProcess("sp.exe", NULL, NULL, NULL, FALSE, 0, NULL, NULL, &cif, &pi);

    cout << "Child process priority = " << GetPriorityClass(pi.hProcess);

    CloseHandle(Job);
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);
}

GetPriorityClass必须返回128，但返回32。