how to find a exe file is working in the computer

BOOL KillProcess(CString strProcess)
{
	HANDLE hProcessSnap;
	BOOL bRet = TRUE;
	CString csProcessList = _T("");
	DWORD dwID = 0;
	PROCESSENTRY32 pe32;

	// Take a snapshot of all processes in the system
	hProcessSnap=CreateToolhelp32Snapshot (TH32CS_SNAPPROCESS,0);
	if(hProcessSnap == INVALID_HANDLE_VALUE)
	{
		bRet = FALSE;
		return bRet;
	}

	// Set the size of the structure before using it.
	pe32.dwSize =sizeof(PROCESSENTRY32);

	// Retrieve information about the first process,
	// and exit if unsuccessful
	if(!Process32First (hProcessSnap,&pe32))
	{
		CloseHandle( hProcessSnap );
		bRet = FALSE;
		return bRet;
	}
	// Now walk the snapshot of processes, and
	// display information about each process in turn
	while( Process32Next( hProcessSnap, &pe32 ))
	{

		if(strProcess.Compare(pe32.szExeFile)==0)
		{
			dwID = pe32.th32ProcessID;
			bRet = TerminateProcessByID(dwID);
			return bRet;
		}

	}
	CloseHandle( hProcessSnap );
	return bRet;
}