作业问题，附上全部源代码，高手请指教

#include <windows.h>
//#include <windowsx.h>
#include <process.h> // for _beginthreadex
#include <tchar.h>
#include <stdio.h>

void main()
{
//Create a job kernel object.
HANDLE hjob =CreateJobObject(NULL,NULL);

//Place some restrictions on processes in the job.
//First,set some basic restrictions.
JOBOBJECT_BASIC_LIMIT_INFORMATION jobli = { 0 };

//The process always runs in the idle priority class.
jobli.PriorityClass = IDLE_PRIORITY_CLASS;

//The job cannot use more than 1 second of CPU time.
jobli.PerJobUserTimeLimit.QuadPart = 10000000;
//1 sec in 100-ns intervals

//These are the only 2 restrictions I want placed on the job (process).
jobli.LimitFlags = JOB_OBJECT_LIMIT_PRIORITY_CLASS |
JOB_OBJECT_LIMIT_JOB_TIME;

SetInformationJobObject(hjob,
JobObjectBasicLimitInformation,
&jobli, sizeof(jobli));

//Second, set some UI restrictions.
JOBOBJECT_BASIC_UI_RESTRICTIONS jobuir;
jobuir.UIRestrictionsClass = JOB_OBJECT_UILIMIT_NONE;
//A fancy zero

//The process can't log off the system.
jobuir.UIRestrictionsClass |= JOB_OBJECT_UILIMIT_EXITWINDOWS;

//The process can't access USER objects
//(such as other windows) in the system.
jobuir.UIRestrictionsClass |= JOB_OBJECT_UILIMIT_HANDLES;

SetInformationJobObject(hjob,JobObjectBasicUIRestrictions,
&jobuir, sizeof(jobuir));

//Spawn the process that is to be in the job.
//Note: You must first spawn the process and then place the process in
//the job. This means that the process's thread must be initially
//suspended so that it can't execute any code outside
//of the job's restrictions.

STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
CreateProcess(NULL, "CMD", NULL, NULL, FALSE,
CREATE_SUSPENDED, NULL, NULL, &si, &pi);
//Place the process in the job.
//Note:if this process spawns any children,the children are
//automatically part of the same job.
AssignProcessToJobObject(hjob,pi.hProcess);

//Now we can allow the child process's thread to execute code.
ResumeThread(pi.hThread);
CloseHandle(pi.hThread);

//Wait for the process to terminate or for all the job's
//allotted CPU time to be used.
HANDLE h[2];
h[0] = pi.hProcess;
h[1] = hjob;
DWORD dw = WaitForMultipleObjects(2,h,FALSE,INFINITE);
switch( dw-WAIT_OBJECT_0 )
{
case 0:
//The process has terminated...
break;
case 1:
//All of the job's allotted CPU time was used...
break;
}

//Clean up properly.
CloseHandle(pi.hProcess);
CloseHandle(hjob);
}


这些函数都找不到，为什么？明明都是在windows中的呀
/------------------

(10) : error C2065: 'CreateJobObject' : undeclared identifier
(10) : error C2440: 'initializing' : cannot convert from 'int' to 'void *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
(27) : error C2065: 'SetInformationJobObject' : undeclared identifier
(59) : error C2065: 'AssignProcessToJobObject' : undeclared identifier
(91) : error C2373: 'AssignProcessToJobObject' : redefinition; different type modifiers
(96) : error C2373: 'CreateJobObject' : redefinition; different type modifiers
(103) : error C2373: 'SetInformationJobObject' : redefinition; different type modifiers