[ros-dev] Distinguish between Windows and ReactOS

[Nick Surfer]

Hello all.
Sorry if this mail is off topic of the mail-list, but am not sure which one is right for my question.
I am writing a program which needs to know exact environment in which it is running. In case of Windows I simply use GetVersionEx and then analyze dwMajorVersion + dwMinorVersion which is enough for my case (then I know which WIN API calls I should use). But I stuck how to recognize that my program runs in ReactOS. I failed to find any docs about it. Any help is appreciated. 
P.S. I am not well experienced in WIN API, so if someone gives me an example it will be great.
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