Question

我真的需要你的帮助，因为我在将一个.DLL函数集成到我的控制台应用程序中遇到了很多问题。这个.DLL包括获取2个字符（字符a和字符b）（输入）并将它们添加到一个字符。例如：字符A = H. Char B = I 输出= HI 但这就是问题所在。当我编译控制台应用程序时，当我运行它时，它表示该函数尚未被检测到。这是我的问题。为什么即使在.def中它也找不到该函数文件我列出了LIBRARY和唯一导出的函数？请帮帮我。 这是.DLL来源

        #include "stdafx.h"
    char concatenazione(char a,char b)
    {
    return a+b;
    }

**THIS IS THE .DEF FILE OF THE .DLL**

    LIBRARY Concatenazione
    EXPORTS
    concatenazione @1

**And this is the dllmain.cpp**


#include "stdafx.h"

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}
**This is the Console Application partial source(For now it just includes the functions import part)**

#include <iostream>
#include <windows.h> 
#include <stdio.h> 

typedef int (__cdecl *MYPROC)(LPWSTR); 

int main( void ) 
{ 
    HINSTANCE hinstLib; 
    MYPROC ProcAdd; 
    BOOL fFreeResult, fRunTimeLinkSuccess = FALSE; 

    // Get a handle to the DLL module.

    hinstLib = LoadLibrary(TEXT("C:\\ConcatenazioneDiAyoub.dll")); 

    // If the handle is valid, try to get the function address.

    if (hinstLib != NULL) 
    { 
        ProcAdd = (MYPROC) GetProcAddress(hinstLib, "concatenazione"); 

        // If the function address is valid, call the function.

        if (NULL != ProcAdd) 
        {
            fRunTimeLinkSuccess = TRUE;
            (ProcAdd) (L"Message sent to the DLL function\n"); 
        }
        // Free the DLL module.

        fFreeResult = FreeLibrary(hinstLib); 
    } 

    // If unable to call the DLL function, use an alternative.
    if (! fRunTimeLinkSuccess) 
        printf("Message printed from executable\n"); 

    return 0;

}
**The Console Applications runs fine but the output is "Message printed from executable".This means that the function hasn't been detected.**

Answer 1

好的，我查看了上面的内容，并想知道在代码中导入dll的位置。我自己也很陌生，所以我找到了this article如何做到这一点。

如果我理解正确，在您的控制台应用程序中，您需要有一行（假设您的dll的名称是“your.dll”：

[DllImport("your.Dll")]

顺便说一句，欢迎来到Stack Overflow，我注意到这是你的第一天！干杯！

无法从控制台应用程序调用.DLL函数

1 个答案: