>>>Imagine writing an app that shares a table and processes a lot of math calcs.
>>>Compile it and name it appA
>>>Compile it again and name it appB
>>>appA uses the top half of the table
>>>appB uses the bottom half of the table
>>>Run them both at the same time
>>>Will the apps take advantage of the dual core?
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>>In general it is not the App that decides which processor or core to use or run on -- it is the job of the OS. In the case of windows, I am not sure how good it is at load balancing between multiple processors or cores. The Enterprise Server edition will be better, but I suspect you are using WinXP Pro or one of the Vista flavors and these I am not sure how good they are at balancing.
>
>Yes, it's vista ultimate running on an athlon 4400+ 64X2 cpu

You should be able to tell which processor an .exe runs on. I know you can do this from the task manager, so perhaps there is an API call you can issue...