I know that WIN32 denotes win32 compilation but what is _WIN32 used for?
I know that WIN32 denotes win32 compilation but what is _WIN32 used for?
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WIN32is a name that you could use and even define in your own code and so might clash with Microsoft’s usage._WIN32is a name that is reserved for the implementor (in this case Microsoft) because it begins with an underscore and an uppercase letter – you are not allowed to define reserved names in your own code, so there can be no clash.