Windows API functions

Are they开发者_如何学C standard code c or c++ code? what are they?

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The original Win32 API is C-based. There are however a substantial number of services within Windows that are COM based. Good examples are the clipboard, drag+drop, the shell, the user mode driver framework, DirectX. While it is technically possible to write COM code in C, it is excruciatingly painful to do so.

Realistically you use C++ there. And a C++ class library to make the original C-based API less painful, especially for GUI code.

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They're standard C code, if you're programming against pure Windows API.

A C++ based wrapper called MFC is available.

All of this is being pushed out in favor of .NET framework.

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The standard Windows API is a C library. Wrappers exist for other languages (C++, etc).

Just read it on wikipedia.

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Windows API is langugage neutral. It is neither C nor C++. Microsoft says that Windows itself is written mainly in C++, but you don't need any classes for vast majority of the API and even classes in API (e.g. in Direct X) can be used in pure C without classes.

Although some C programmers think it is a C library, compiler of a programming language must support proprietary Windows calling model, it is not a classic C calling convention. (Obviously almost each real world C compiler supports it nowadays.)