windows VC++/Dev-C++：如何包含一个 DLL？
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VC++ / Dev-C++: How to include an DLL?
提问by Daniel Marschall
I have written an DLL in Delphi which exports functions. I would like to use these functions in a C++ program without using dynamic Linking (LoadLibrary() API-Call).
我在 Delphi 中编写了一个导出函数的 DLL。我想在 C++ 程序中使用这些函数而不使用动态链接（LoadLibrary() API-Call）。
The "import" declaration would be
“进口”声明将是
extern "C" int __stdcall getVersionNumber();
I mainly use Bloodshed Dev-C++ which creates Windows Executables. But I do not know how to tell the compiler that it should import the function "getVersionNumber" from "STATMONDLL32.dll".
我主要使用 Bloodshed Dev-C++ 来创建 Windows 可执行文件。但我不知道如何告诉编译器它应该从“STATMONDLL32.dll”导入函数“getVersionNumber”。
After I spent many hours by googling the problem, without any result (there was only weird stuff written about .a files and .lib files, which I do not have compiled by Delphi...) I have also installed VC++, but even there, I could not find a way to tell the compiler to use a specific DLL.
在我用谷歌搜索问题花了很多时间后，没有任何结果（只有关于 .a 文件和 .lib 文件的奇怪的东西，我没有用 Delphi 编译......）我也安装了 VC++，但即使有，我找不到告诉编译器使用特定 DLL 的方法。
I have created a DEF file for this DLL - how can I tell Dev-C++ and/or VC++ to use it? (Dev-C++ prefered)
我已经为这个 DLL 创建了一个 DEF 文件 - 我如何告诉 Dev-C++ 和/或 VC++ 使用它？(Dev-C++ 首选)
// Edit: Delphi is creating UNDECORATED symbols. The symbol is exactly "getVersionNumber".
// 编辑：Delphi 正在创建 UNDECORATED 符号。该符号正是“getVersionNumber”。
I have created following DEF file with an alias for decoration:
我创建了以下带有装饰别名的 DEF 文件：
LIBRARY STATMONDLL32
EXPORTS
getVersionNumberA = _getVersionNumberA@0
I have created a *.lib file with VC++ "lib.exe":
我用 VC++“lib.exe”创建了一个 *.lib 文件：
lib.exe /DEF:StatMonDll32.def /OUT:StatMonDll32.lib
I have included the lib in VC++ linker settings.
我已将 lib 包含在 VC++ 链接器设置中。
But VC++ tells me that it cannot resolve the external symbol _getVersionNumberA@0 ! Please help!
但是 VC++ 告诉我它无法解析外部符号 _getVersionNumberA@0 ！请帮忙！
// Edit: I have uploaded the DLL here: http://www.viathinksoft.de/temp/StatMonDll32.dll. Can you access the symbol getVersionNumberA with VC++ ? I am searching for a solution since 6 days now :'-(
// 编辑：我在这里上传了 DLL：http: //www.viathinksoft.de/temp/StatMonDll32.dll。你能用 VC++ 访问符号 getVersionNumberA 吗？自 6 天以来，我一直在寻找解决方案 :'-(
Best regards
此致
Daniel Marschall
丹尼尔·马歇尔
回答by Ben Voigt
You can use dynamic linking, it should work something along the lines of:
您可以使用动态链接，它应该按照以下方式工作：
extern "C" typedef int (__stdcall *pfnadd)(int a, int b);
extern "C" typedef int (__stdcall *pfngetversion)(void);
HMODULE mod = LoadLibraryA("mydll.dll");
pfnadd add = (pfnadd)GetProcAddress(mod, "Add");
pfngetversion getVersionNumberA =
(pfngetversion)GetProcAddress(mod, "getVersionNumberA");
and then you can just call using the function pointer:
然后你可以使用函数指针调用：
add(1, 2);
std::cout << getVersionNumberA();
Although, it seems like your question has bits and pieces of two different functions!
虽然，您的问题似乎有两个不同功能的点点滴滴！
