In a message of    Well, I have used DosEnterCritSec when I had to call a 
 DAB> time-critical communications routine in order to prevent timeouts 
 DAB> (Communicating with weird PLC's).

 >That wouldn't happen to have been an Allen-Bradley PLC (specifically, the 
 >SLC500 series via PIC...), would it?  

Bingo.  Actually, the Allen Bradley's weren't nearly as bad as the
GE SNP PLC's.   Why the ? 

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