Windows compiling
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http://msdn.microsoft.com/en-us/library/ms241064%28v=vs.80%29.aspx
(If you want to do it command-line style, use "/platform:x64" to force 64bit compilation. This won't make the application run better on 64bit.)
I'd also suggest trying #1 of what is suggested on the "Approved Answer" on this:
http://stackoverflow.com/questions/5978722/compile-c-code-for-windows-64
