windows用snapshot找到指定进程的id，然而用来openprocess却是127

代码

 int GetTargetProcessId()
{
    PROCESSENTRY32 pe32;
    pe32.dwSize=sizeof(pe32);

    DWORD ProcessId;

    HANDLE hHandle=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
    if(hHandle==INVALID_HANDLE_VALUE)
    {
        printf("fail to call\n");
        exit(-1);
    }

    int TargetProcessId;

    const wchar_t *target=L"notepad.exe";

    BOOL bMore=::Process32First(hHandle,&pe32);

    while(bMore)
    {
        printf("the name is %ws ,the id is %d\n",pe32.szExeFile,pe32.th32ProcessID);


        if((wcscmp(pe32.szExeFile,target))==0)
        {
            TargetProcessId=pe32.th32ProcessID;
            return TargetProcessId;
        }
        bMore=::Process32Next(hHandle,&pe32);

    }

    return -1;
    }



    int main()
{
    HANDLE hTargetHandle;
    int TargetProcessId=GetTargetProcessId();
    //DWORD TargetProcessId=3304;

    hTargetHandle=OpenProcess(PROCESS_ALL_ACCESS,FALSE,TargetProcessId);
    if(hTargetHandle==INVALID_HANDLE_VALUE);
    {

        printf("openprocess fail\n");
        printf("the TargetProcessId is: %d\n",TargetProcessId);
        DWORD d=GetLastError();
        printf("the result of getlast is: %d\n",d);
        system("PAUSE");
        exit(-1);
    }

我运行记事本后再运行这个程序，找到了记事本的进程的id，用openprocess，却失败了，getlasterror的结果是127，找不到制定的程序

希望大神指点

hTargetHandle=OpenProcess(PROCESS_TERMINATE, FALSE, TargetProcessId);

看看是不是进程没有正确读取到造成的。

s检查是是否有权限，其次有些系统进程会被保护或者杀毒软件拦截