From: "Geo" 

Ok I'll take your word for it (I did what you suggested and it does indeed
initialize it and remains random for each push of the button).

I have no idea how to create threads though so a lot of what you said went
over my head.

Geo.

"Paul Ranson"  wrote in message
news:41b4e282{at}w3.nls.net...
> The 'OnPlay3' function is called every time you press the button it's
mapped
> to. All the MFC stuff is happening on a single thread so you can safely
call
> 'srand' elsewhere and not need to again.
>
> The library random number generator has its own private state that cares
> little for your classes and functions, but it gets a new copy for each
> thread. Your program is single threaded, so no problem.
>
> Paul

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