为什么TerminateProcess关不了进程

找来的代码,进程ID找到,OpenProcess也成功返回句柄,TerminateProcess却总是失败,高手指教下...

// FindProcess
// 这个函数唯一的参数是你指定的进程名，如:你的目标进程
// 是 "Notepad.exe",返回值是该进程的ID，失败返回0
//

DWORD FindProcess(char *strProcessName)
{
DWORD aProcesses[1024], cbNeeded, cbMNeeded;
HMODULE hMods[1024];
HANDLE hProcess;
char szProcessName[MAX_PATH];

if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) ) return 0;
for(int i=0; i< (int) (cbNeeded / sizeof(DWORD)); i++)
{
//_tprintf(_T("%d\t"), aProcesses[i]);
hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, aProcesses[i]);
EnumProcessModules(hProcess, hMods, sizeof(hMods), &cbMNeeded);
GetModuleFileNameEx( hProcess, hMods[0], szProcessName,sizeof(szProcessName));

if(strstr(szProcessName, strProcessName))
{
//_tprintf(_T("%s;"), szProcessName);
return(aProcesses[i]);
}
//_tprintf(_T("\n"));
}


return 0;
}

// Function: ErrorForce
// 此函数中用上面的 FindProcess 函数获得你的目标进程的ID
// 用WIN API OpenPorcess 获得此进程的句柄，再以TerminateProcess
// 强制结束这个进程

VOID KillProcess()
{
// When the all operation fail this function terminate the "winlogon" Process for force exit the system.
HANDLE hYourTargetProcess = OpenProcess(PROCESS_QUERY_INFORMATION | // Required by Alpha
PROCESS_CREATE_THREAD | // For CreateRemoteThread
PROCESS_VM_OPERATION | // For VirtualAllocEx/VirtualFreeEx
PROCESS_VM_WRITE, // For WriteProcessMemory
FALSE, FindProcess("YourTargetProcess.exe"));

if(hYourTargetProcess == NULL)
{
return;
}

TerminateProcess(hYourTargetProcess, 0);

return;
}