Loadlibrary fails to load dll

Question

    *******************UseDll1.cpp*********************

        #include 

typedef int (*function1_ptr) ();

function1_ptr function1=NULL;

int APIENTR         


        

Answer 1

Just because the code runs and exits doesn't mean it's right! Are you sure that:

• The DLL is being correctly loaded (myDll!=null)
• GetProcAddress is returning a valid pointer (function1!=null)

You should step through the code in a debugger to make sure all this is happening and that the code does get to function1(). If it does then my guess would be that your email function has a bug in it.

Answer 2

Have you verify that you have all external dependencies for "DLL1.dll" ?

LoadLibrary will fail even if any of the indirect linked-library is not available.

Answer 3

Why not debug it and see where it fails? Make sure your dll is actually being loaded(it could simply be a path issue or a bad dll(you might have not imported/exported the functions).

Find out where the issue is first. It's either in loading the dll, calling the function, or inside the function

Answer 4

Thank you very much, your web page helped me a lot :) I only had to use tchar.h to make it working. You can see it in the rest of the answer.

#pragma once
#include <windows.h>
#include "spinapi.h"
#include <tchar.h>

typedef int (*count_boards_ptr)(void);

int x = 0;
HINSTANCE hinstDLL;
hinstDLL = LoadLibrary(_T("C:\\Smajdalf\\doucko_C\\DLLProblem\\DLLProblem\\spinapi.dll"));
count_boards_ptr count_boards = NULL;
count_boards = (count_boards_ptr) GetProcAddress(hinstDLL, "pb_count_boards");

if(count_boards != NULL) {
    x = count_boards();
}

FreeLibrary(hinstDLL);

Answer 5

I had the same issue. This link resolved it. The issue was that I was not using _T macro.

Answer 6

I think you have already checked existence of dll.

Now Try this ::

Try to change "Any CPU" to 86 or 64.

Try to run your application as administrator.