<<
The timer runs in its' own thread, so ProcessMessage should give the message 
loop a breather for screen updates.
>>

Is this true?  I was under the impression that the timer was actually run 
inside Windows, which dispatches a message (WM_TIMER, I think) back to the 
application's main thread when the timer "goes off".  If the main thread is 
blocked (as with a long call into the RBENGINE.DLL) it strikes me that the 
timer message might not make it, or might not be seen by the application in a 
timely fashion.

Have you actually tried this -- setting a timer and then somehow blocking on 
the winmain() thread to see if the timer gets executed?

If this is the case, I imagine you might be able to work around it by including 
a call to a stored procedure in you SQL statement; a stored procedure that 
include a PROCESSMESSAGES statement.  But it would slow down your SQL.
--
Larry


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