C ++ DLL与C#应用程序之间的通信 [英] Communication between C++ DLL and C# Applicaiton

问题描述

使用.Net Compact Framework 2

我有一个C ++ DLL，它实现了STDAPI DllGetClassObject(REFCLSID rclsid，REFIID riid，void ** ppObject)
，我也有一个C#应用程序实现MessageWindow，以在每次调用DllGetClassObject时侦听来自C ++ DLL的事件.

首先，我试图传递一个指向SendMessage的LPARAM参数的指针(在C ++中)，但这是成功的，当C#收到它时，它无法正确转换/广播.
例如

Using .Net Compact Framework 2

I have a C++ DLL which implements STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, void ** ppObject)
and I also have a C# application which implements MessageWindow to listen for an event from the C++ DLL whenever DllGetClassObject gets called.

At first I was trying to pass a pointer to the LPARAM parameter of SendMessage (in C++), this was successful, however, when C# receives it it can't convert/cast it properly.
e.g

<C++>
int* x = new int;
*x = 99;
SendMessasge(hwnd, WM_ACTIVATE, 0, (LPARAM)x);

<C#, using unsafe code>
int* x = (int*) m.LParam;

因此，我尝试使用共享内存...但是，这仍然成为问题.

我感谢大家的帮助.
/>
谢谢.

This causes the application to crash with no exception.

Thus I tried using shared memory...however, this still becomes the problem.

I appreciate everyone's help.

Thanks.

推荐答案

你好，

我不明白为什么不使用DLLImport呢?它比使用不安全的代码更好，更安全.如果您有兴趣，可以参考
DllImportAttribute DLLImport.
感谢
Chao

Hello,

I do not understand why not you use DLLImport instead. It is much better and safe than using unsafe code. You could reference
DllImportAttribute, if you have interest in DLLImport.
Thanks
Chao

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