问题描述
我在我的基于Win32的桌面应用程序中有一个WinRT类(C ++ / CX参考类)。它访问WinRT API并且工作正常。我使用获取它加工。现在我试图将这个类放在桌面应用程序可以使用的库中。我有这么多的麻烦。这是我在Visual Studio 2013中所做的:- 通过选择已安装>模板> Visual C ++> Store Apps创建一个新项目> Windows应用程序> DLL(Windows)。
- 将这个新的DLL项目添加到包含我的桌面应用程序的解决方案中。
- 添加了一个引用到DLL项目
- 在配置属性> C / C ++>常规>其他#using目录我添加了.winmd文件由DLL构建的目录项目。
- 在桌面应用程序的.cpp文件中,我添加了:
#using< MyLib.winmd>
#using< Windows.winmd>
#using< Platform.winmd>
[MTAThread] //初始化WinRT运行时
int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPTSTR lpCmdLine,
_In_ int nCmdShow){
MyWinRTClass ^ myObject = ref new MyWinRTClass();
}
Intellisense工作,我写了代码从库中实例化类。桌面应用程序构建,但运行时我得到:
发生了什么事?这是正确的方法吗?
这是不可能的。为了使应用程序使用定制的WinRT组件,组件需要首先注册。对于打包(AppX)应用程序,可以通过将一些信息添加到包的AppXManifest.xml中来完成。然而,对于常规的Win32 Desktop应用程序,现在有这样的注册方式。您可以直接从操作系统提供的WinRT API,但您无法写入自己的自定义WinRT API以供其他应用程序使用。
I have a WinRT class (C++/CX ref class) in my Win32-based desktop app. It accesses WinRT APIs and works just fine. I used this guide to get it working. Now I'm trying to put this class in a library that the desktop app can use. I'm having quite a bit of trouble with this. Here's what I did in Visual Studio 2013:
- Created a new project by selecting Installed > Templates> Visual C++ > Store Apps > Windows Apps > DLL (Windows).
- Added this new DLL project to the solution containing my desktop app.
- Added a reference to the DLL project
- In Configuration Properties > C/C++ > General > Additional #using Directories I added the directory where the .winmd file gets built by the DLL project.
- In a .cpp file in the desktop app, I added:
#using <MyLib.winmd>
#using <Windows.winmd>
#using <Platform.winmd>
[MTAThread] // initializes WinRT runtime
int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPTSTR lpCmdLine,
_In_ int nCmdShow) {
MyWinRTClass^ myObject = ref new MyWinRTClass();
}
Intellisense works and I wrote code to instantiate the class from the library. The desktop app builds, but when it runs I get:
What's going on? Is this the right approach?
This is not possible. In order for an app to use a custom WinRT component, the component needs to be "registered" first. For packaged (AppX) apps this is done by adding some information into the AppXManifest.xml of the package. However for regular Win32 Desktop apps, there is now way for such registration. You can call WinRT API directly provided by the OS but you cannot write to your own custom WinRT API to be consumed by other apps.
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