A detailed introduction to a small program for deleting processes

When I looked at the windows api, as an exercise, I wrote a program to delete the process. I think there are quite a lot of knowledge points in it, so I posted it as a note. Of course, there are bound to be errors, and any advice is welcome ^^
The function for adjusting permissions mentioned in the article was also used, so I copied it directly from the shutdown program. The following is the program, with comments in key places.

看windows api的时候，作为练习，编写了个删除进程的程序。觉得里面知识点挺多的，所以贴上来当个笔记用。当然难免有错误，欢迎指教 ^^    
其中也用到了上篇文章里面说到的调整权限的函数，于是就直接从关机程序里面copy过来了。下面是程序，关键地方给了注释。
#include<stdio.h>
#include<windows.h>
#include<Tlhelp32.h>

void ListProcess()                        //列出进程名称及ID
{
    HANDLE hProcessSnap=NULL;
    PROCESSENTRY32 pe32={0};            //存放进程信息的结构体
    hProcessSnap=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);        //创建系统所有进程的快照
    if(hProcessSnap==INVALID_HANDLE_VALUE)
    {
        printf("CreateToolhelp32Snapshot failed: %d\n",GetLastError());
        return;
    }
    pe32.dwSize=sizeof(PROCESSENTRY32);
    printf("ProcessName            ProcessID\n");
    if(Process32First(hProcessSnap,&pe32))                //指向第一个进程，并将其放入PROCESSENTRY32结构体中
    {
        char c[5];
        do
        {
            itoa(pe32.th32ProcessID,c,10);
            printf("%-30s%d\n",pe32.szExeFile,pe32.th32ProcessID);        //szExeFile为进程的可执行文件名称
        }
        while(Process32Next(hProcessSnap,&pe32));
    }
    else
    {
        printf("Process32First() failed:%d\n",GetLastError());
    }
    CloseHandle(hProcessSnap);
    return;
}

BOOL EnablePrivilege()                //获取系统权限
{
    HANDLE hProcess = NULL;
    HANDLE hToken = NULL;
    LUID uID = {0};
    TOKEN_PRIVILEGES stToken_Privileges = {0};
    hProcess = GetCurrentProcess();                                    //获取当前应用程序进程句柄
    if(!OpenProcessToken(hProcess,TOKEN_ADJUST_PRIVILEGES,&hToken))    //打开当前进程的访问令牌句柄
                                                                    //(OpenProcessToken函数调用失败返回值为零)
        return FALSE;
    if(!LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&uID))        //获取权限名称为"SeShutdownPrivilege"的LUID
                                                                //LookupPrivilegeValue函数调用失败返回值为零
        return FALSE;
    stToken_Privileges.PrivilegeCount = 1;                            //欲调整的权限个数
    stToken_Privileges.Privileges[0].Luid = uID;                    //权限的LUID
    stToken_Privileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;        //权限的属性,
                                                                            //SE_PRIVILEGE_ENABLED为使能该权限
    //调整访问令牌里的指定权限(AdjustTokenPrivileges函数调用失败返回值为零)
    if(!AdjustTokenPrivileges(hToken,FALSE,&stToken_Privileges,sizeof stToken_Privileges,NULL,NULL))
        return FALSE;
    if(GetLastError() != ERROR_SUCCESS)                                //查看权限是否调整成功
        return FALSE;
    CloseHandle(hToken);
    return TRUE;
}

bool KillProcess(DWORD id)
{
    HANDLE hProcess=NULL,hProcessToken=NULL;
    bool isKilled=false,bRet=false;

    EnablePrivilege();                    //调整权限
    printf("Enable Privilege OK!\n");
    if((hProcess=OpenProcess(PROCESS_ALL_ACCESS,FALSE,id))==NULL)    //打开进程获得句柄
    {
        printf("Open process %d failed: %d\n",id,GetLastError());
        return false;
    }
    if(!TerminateProcess(hProcess,1))                                //终结进程
    {
        printf("TerminateProcess failed: %d\n",GetLastError());
        return false;
    }
    isKilled=true;
    if(hProcessToken!=NULL)
        CloseHandle(hProcessToken);
    if(hProcess!=NULL)
        CloseHandle(hProcess);
    return isKilled;
}

void main()
{
    int id=0;
    ListProcess();
    while(1)
    {
        printf("选择要删除的进程ID：");
        scanf("%d",&id);
        if(KillProcess(id)==true)
        {
            system("cls");
            ListProcess();
        }
        else
            printf("Failed!!");
    }
}

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