OK, I eventually got it done as per instructions in these two links.
<http://ramblings.aaronballman.com/2005/09/How_to_use_a_Mutex_Part_1).html>>
and
<http://ramblings.aaronballman.com/2005/09/How_to_use_a_Mutex_Part_2).html>
What I notice is that with the mutex the second instance of the app opens
briefly then closes.
Is there a way of preventing the second instance from opening any at all?
Thanks.
Lennox
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