PF> DosEnterCritSec() is a bad practice,  it is NEVER
 PF> _required_ (you can
 PF> always use a sem instead),  and shoots SMP OS/2 in the foot.

 GG> But how much difference will it make for a two threaded program ?

A lot.  DosEnterCritSec() _ALWAYS_ forces all other threads to stop.

A semaphore will only cause another thread (or the thread asking for the
semaphore) to stop if and only if there has been a collision with that
semaphore.

Big difference.

--- Maximus/2 3.00