从C使用WinRT的？ [英] Using WinRT from C?

问题描述

看着//建立的东西，我看到的WinRT API的可以被C code消耗：

我比较兴奋，可到Win32开发一个新的C API。

在哪里可以找到关于C的WinRT API的信息？它是如何比现有的Win32 C API更好？

解决方案

WinRT的根本COM，因此使用从C是像以前一样利用C.像COM组件，你得到的.idl文件所有的WinRT组件的WinRT组件，以及同样的.h从这些文件的.idl产生的文件。该.h文件包括C ++和C声明（根据需要放在的#ifdef __cplusplus ）。你可以只＃包括它们并开始劈砍而去。

这不完全整齐，虽然，例如像这样C ++ / CX：

 的Windows UI :: :: XAML中::控制:: TextBlock的^ TB = ...;
TB-＆gt;文字=富;
 

：相当于这香草C ++

 的Windows UI :: :: XAML中::控制:: ITextBlock * TB = ...;
HSTRING HS;
HRESULT HR = WindowsStringCreate（L富，3，＆安培; HS）;
//检查小时的错误
HR = TB-＆GT; set_Text（HS）;
//检查小时的错误
TB-＆GT;发行（）;
 

将被写在C为：

  __ x_Windows_CUI_CXaml_CControls_CITextBlock * TB = ...;
HRESULT小时;
HSTRING HS;
HR = WindowsCreateString（L富，3，＆安培; HS）;
//检查小时的错误
HR = __x_Windows_CUI_CXaml_CControls_CITextBlock_put_Text（TB，HS）;
//检查小时的错误
IUnknown_Release（TB）;
 

看看。C：\\ Program Files文件（x86）的\\的Windows套件\\ 8.0 \\ \\包含WinRT的，在开发preVIEW看到的.idl和.h文件

Watching the //BUILD stuff, I saw that WinRT API's can be consumed by C code:

I am rather excited about a fresh C API available to Win32 developers.

Where can I find information on the C WinRT API? How is it better than the existing Win32 C API?

解决方案

WinRT is fundamentally COM, so using WinRT components from C is like using COM components from C. Like before, you get .idl files for all WinRT components, and also .h files produced from those .idl files. The .h files include both C++ and C declarations (wrapped in #ifdef __cplusplus as needed). You can just #include them and start hacking away.

It's not exactly neat, though, e.g. something like this C++/CX:

Windows::UI::Xaml::Controls::TextBlock^ tb = ...;
tb->Text = "Foo";

which is equivalent to this vanilla C++:

Windows::UI::Xaml::Controls::ITextBlock* tb = ...;
HSTRING hs;
HRESULT hr = WindowsStringCreate(L"Foo", 3, &hs);
// check hr for errors
hr = tb->set_Text(hs);
// check hr for errors
tb->Release();

would be written in C as:

__x_Windows_CUI_CXaml_CControls_CITextBlock* tb = ...;
HRESULT hr;
HSTRING hs;
hr = WindowsCreateString(L"Foo", 3, &hs);
// check hr for errors
hr = __x_Windows_CUI_CXaml_CControls_CITextBlock_put_Text(tb, hs);
// check hr for errors
IUnknown_Release(tb);

Look inside "C:\Program Files (x86)\Windows Kits\8.0\Include\winrt" in Developer Preview to see the .idl and .h files.

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