<YET ANOTHER PLUG ALERT>
Also forgot to mention, MasterOp has a REPLYINFO function, so you could set up
something like this in MasterOp:
RUN MPEX.PUB.VESOFT;HOOK=%;NOACT
WHENEVER (REPLYINFO(*,PIN) <> 0) DO &
%WARNF OPERATOR.SYS REPLY &
~[REPLYINFO(*,ALL)] PENDING
<END YET ANOTHER PLUG>