DWORD PPIDfromPID(DWORD dwPID)
{
  HANDLE hSnap;
  DWORD dwPPID = 0; 
  PROCESSENTRY32 pe = {sizeof(PROCESSENTRY32)};

  hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);

  if(Process32First(hSnap, &pe))
  {
    do
    {
      if(dwPID == pe.th32ProcessID)
      {
        dwPPID = pe.th32ParentProcessID;     
        break;     
      }     
    }
    while(Process32Next(hSnap, &pe));
  }

  CloseHandle(hSnap);
  return dwPPID;
}