捕获由简单的C ++ DLL中的MFC应用程序生成的Windows消息 [英] Capture windows messages generated by an MFC app in plain C++ dll

问题描述

首先：这是否可能？

我有一个第三方dll可以接口一些硬件。它是用MFC写的。我收到（从dll厂商）一个示例Visual Studio 2010解决方案只有一个项目：MFC应用程序（.exe）调用第三方dll有问题。它工作正常。

I have a third party dll that interfaces some hardware. It's written in MFC. I received (from the dll vendors) a sample Visual Studio 2010 solution which has only one project: An MFC application (.exe) which calls the third party dll in question. It works fine.

当我尝试使用我的dll（这是普通的C ++，没有MFC，没有.NET）的第三方dll，我可以调用它的功能好的，但有一个抓住：样本MFC应用程序似乎覆盖MessageProc，以捕获第三方dll生成的某些消息。虽然dll有一个名为RegisterFuncCallback的函数，我使用它，我的回调永远不会被调用。

When I try to use the third party dll from my dll (which is plain C++, no MFC, no .NET), I can call its functions fine, but there's a catch: the sample MFC app seems to "override" MessageProc in order to capture certain messages that the third party dll generates. And though the dll has a function called "RegisterFuncCallback" and I use it, my callback never gets called.

所以这里是问题：如何捕获这些消息而不创建一个MFC应用程序？ （甚至可能吗？）

So here's the problem: How can I capture those messages without creating an MFC app? (Is it even possible?)

推荐答案

好的，我做了。以下是如何：

Alright, I made it. Here's how:

1. 创建一个从CWnd继承的类


2. 声明一个消息映射，将所需的消息和他们的处理程序


3. 创建窗口时，使用CreateEx函数（我在我的类的构造函数中这样做），并将其传递给最后一个参数中的HWND_MESSAGE标志。这将创建窗口作为消息窗口，即不可见。


4. 完成初始化窗口和MFC DLL之后，我在我的隐藏窗口中调用RunModalLoop一个单独的线程，因为它被阻止。这将启动消息泵，并开始接收MFC DLL的消息。

1. Create a class which inherits from CWnd
2. Declare a message map associating the desired messages and their handlers
3. When creating the Window, use the CreateEx function (I did it in my class's constructor), and pass it the HWND_MESSAGE flag in the last but one parameter. This will create the window as a "Message Window", that is, invisible.
4. Once I'm done initializing the window and the MFC dll, I call RunModalLoop on my hidden window, in a separate thread, since it's blocking. This fires up the message pump, and starts receiving the MFC dll's messages.

编辑：我可以终于只需使用Win32 API即可。这是我的故事，代码包括：
计划Algo博客。别担心，这是英文。

Edit: I could finally do it using just Win32 API. Here's my story, code included: Programate Algo Blog. Don't worry, it's in English.

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