Re: VS 2005/C++/x64

Hi Mark,

Thanks for your feedback.

Yes, _WIN32 is automatically predefined by the compiler for both 32bit and
64bit platform, see the link below:

WIN32 is not defined by the compiler. I believe it widely used as _WIN32
substitute, probably by people who didn't know about _WIN32 or cannot use
it for whatever reason.


Best regards,
Jeffrey Tan
Microsoft Online Community Support