[Microsoft] has offered [C] compilers on its principal operating systems for years; sometimes, as for much of the last decade,
they hold a majority position in that particular market.  While this compiler is generally regarded as a for-fee
proprietary product 
[http://msdn.microsoft.com/howtobuy/],
recently mostly known as "Visual C++",
during much of the twenty-first century Microsoft
has offered no-charge versions of the core compiler.
This page aims to collect information that makes it as easy as possible for [Tcl]-oriented developers to
work with Microsoft's C compiler.

[[... much more ...]

[[See this
[http://www.vrplumber.com/programming/mstoolkit/] page written from a [Python] perspective.]]

Perhaps you want to check out [Building Tcl with the free VC++ toolkit]

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[[ [Category Porting] ]]