Loading the 'C' DLL in matlab.

Suppose I am haing a DLL Compiled in C Language. How to I supposed to Include those DLL's into standard path, So that I can able to compile a c application file and execute in Matlab.

Assumed Dll consists of :

<mathlib.h>

// MathLibrary.h - Contains declarations of math functions

#pragma once

#ifdef MATHLIBRARY_EXPORTS

#define MATHLIBRARY_API __declspec(dllexport)

#else

#define MATHLIBRARY_API __declspec(dllimport)

#endif

extern "C" MATHLIBRARY_API int add(int, int);

extern "C" MATHLIBRARY_API int sub(int, int);

extern "C" MATHLIBRARY_API int mul(int, int);

<Mathlibrary.cpp>

// MathLibrary.cpp : Defines the exported functions for the DLL.

#include "pch.h" // use stdafx.h in Visual Studio 2017 and earlier

#include <utility>

#include <limits.h>

#include "mathlib.h"

int add(int x, int y) {

return x + y;

}

int sub(int x, int y) {

return x - y;

}

int mul(int x, int y) {

return x * y;

}

<Mathclient - Application Program>

// MathClient.cpp : Client app for MathLibrary DLL.

// #include "pch.h" Uncomment for Visual Studio 2017 and earlier

//#include <iostream>

#include <stdio.h>

#include "mathlib.h"

int main()

{

printf("The addition is %d\n", add(4,5));

}

Answer 1

[Walter Roberson]

If this is for calling from within mex then see https://www.mathworks.com/matlabcentral/answers/99915-can-i-call-an-external-shared-library-dll-from-a-matlab-mex-file

Otherwise addpath() the directory the dll is in, and use loadlibrary() https://www.mathworks.com/help/matlab/ref/loadlibrary.html

If you are compiling an exe then you should use either a prototype file or a thunk file for loadlibrary(), and you would add the dll as a resource to be bundled into the executable.