Calling C++ DLLs from VC++

最新推荐文章于 2021-05-20 07:42:57 发布

lid0770

最新推荐文章于 2021-05-20 07:42:57 发布

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文章标签： vc++ c++ include dll

本文链接：https://blog.youkuaiyun.com/lid0770/article/details/1531084

本文介绍了一种改进的方法来定义DLL中的导出符号。通过在Test.cpp文件中明确添加#define TEST_EXPORTS行，并确保其位于包含Test.h之前，使得DLL的导出更加清晰且易于维护。这种方法避免了使用项目选项中的宏定义，从而减少了后期维护的问题。

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While this method certainly works, it is obscure, and may cause maintenance problems later on. I prefer to make explicit the definition of TEST_EXPORTS. I do this by deleting /D "TEST_EXPORTS" from the Project Options, and then changing Test.cpp to define TEST_EXPORTS:

// Test.cpp : Defines the entry point for the DLL application.

#include " stdafx.h "

#define TEST_EXPORTS // <=== ADD THIS LINE

#include " Test.h "

BOOL APIENTRY DllMain( HANDLE hModule,

DWORD ul_reason_for_call,

LPVOID lpReserved)

{

Notice that the #define TEST_EXPORTS is before the line #include "Test.h", so that the definition will be seen in the include file. Now Test.dll compiles just as before, and you will have a DLL that can be called from other VC++ applications.

文章出处：http://www.codeproject.com/dll/XDllPt1.asp