#pragma omp parallel private (iThreads, iMyThread)
{
  iThreads = omp_get_num_threads ();
  iMyThread = omp_get_thread_num ();
  ...
}

#pragma omp parallel for
  for (i = 0 ; i < MAX ; i ++)
    a [i] = 0;

#pragma omp parallel sections
{
  #pragma omp section
    DoOneThing ();
  #pragma omp section
    DoAnotherThing ();
}