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Improve application speed with Dual Core

I develop a MFC application with Visual Studio 6.0.  If is a very intensive program (lots of calculations) and uses onidle() to grab any spare system resources and run an analysis.  This is fine, except that running other programs is sluggish.

We have been told that with a dual core machine, we could add "a line of code" which would mean our application could run in the background nicely while the user gets on with other stuff and less interference.  

Is this correct, and if so, any tips on the one line of code that will help us?!


2 Solutions
Usually, if you have a dual core machine, you don't have to add anything, since the OS will transparently schedule you application and the others to load balance both cores. If you have a multithreaded app, you can use 'SetThreadIdealProcessor()' to set a worker thread to run on a certain core to improve the responsiveness of the system.
Indeed,a dual-core-cpu is a double-processor and was balanced automatically by the operation system. Any interferences from you may work contra that kind of optimization. The OnIdle doesn't run in a separate thread but simply was invoked when the message queue was empty. So, it runs in the same thread as the application and was processed by one core only while the other could handle all other applications.

Regards, Alex
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