building to make use of dual processors

I am creating an application for a dual processor PC running Windows NT.  I am developing using VC++ 6.0

What do I need to do to make use of the dual processors on the machine.  When I compile do I need to build the app differently or something?

Thanks for your help, Vida
vpomonaAsked:
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jhanceConnect With a Mentor Commented:
If you have 2 (or more) processors under NT, you use all of them all the time.  But, unless your app is multi-threaded, it will not experience any changes on its own.

If you build your application with multiple threads, the NT thread scheduler will allocate the active threads among the available CPUs according to it's own logic.  That generally works out well.  So to get your app to use multiple CPUs, create threads.
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vpomonaAuthor Commented:
Thanks JHance, I am understanding from what you have said is that there is no  directing the compiler to make use of dual processors and that any application running under NT will make use of the dual processors if they are there AND the application is multi-threaded.  Correct?
Thanks Vida
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jhanceCommented:
That is the case.
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