conditional compile between windows server 2008 and windows server 2008 R2

Question

There are changes in few OS structures in R2(eg. vds provider) from w2k8.

So how do I conditional compile my source to appropriate version? or will I need to ship complete different projects for R2 and w2k8.

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If possible I want preprocessor ifdef flag like _WIN32_WINNT and WINVER.

I want to avoid using SDK to detect version. But if there is no flag(accodring to my googling skills) kindly suggest the method to find OS version via SDK.

Answer 1

Once you use conditional compilation you bind to one setup - either pre-R2 or R2 and this can't be changed during runtime. You either need to ship two versions or have one version that will behave differently in runtime - check the OS version (in runtime, not in compile time) and behave appropriately during each OS-dependent operation.