程序代码：

#include "stdio.h"
#include "windows.h" 
#define MEM_LIMIT 4096*1000 
int main(int argc, char* argv[])
{   
    HANDLE hjob;   
    char *job_name="J1",*pro_name="notepad";   
    int err;   
    JOBOBJECT_EXTENDED_LIMIT_INFORMATION joeli;   
    JOBOBJECT_BASIC_LIMIT_INFORMATION jbii={0};   
    STARTUPINFOA si ={sizeof(si)};   
    PROCESS_INFORMATION pi;   
     
    if((hjob=CreateJobObjectA(NULL,job_name))==NULL)   
    {       
        printf("Cannot create job!\n");       
        return 1;   
    }     
    joeli.BasicLimitInformation.LimitFlags=JOB_OBJECT_LIMIT_PROCESS_MEMORY;   
    joeli.ProcessMemoryLimit=MEM_LIMIT;     
    if(SetInformationJobObject(hjob,JobObjectExtendedLimitInformation,&joeli,sizeof(joeli))==0)   
    {      
        err=GetLastError();       
        printf("Fail to set job attributes, Error Code:%d\n",err);       
        return 1;  
    }     
    if(CreateProcessA(NULL,pro_name,/*JOB_OBJECT_ALL_ACCESS*/NULL,/*JOB_OBJECT_ALL_ACCESS*/NULL,FALSE,CREATE_SUSPENDED,NULL,NULL,&si,&pi)==0)   
    {       
        err=GetLastError();       
        printf("Cannot create Process %s, Error Code:%d\n",pro_name,err);       
        return 1;   
    }       
    if(!AssignProcessToJobObject(hjob,pi.hProcess))   
    {       
        err=GetLastError();       
        printf("Fail to assign process to job Eror Code:%d\n",err);  
    }     
    ResumeThread(pi.hThread);     
    WaitForSingleObject(pi.hProcess,INFINITE);     
    return 0;
}