error in using calllib function

i want to use callib function but it shows me an error?

>> loadlibrary('t1.dll', 't1header.h')

>> calllib('t1','Add',2,3)

??? Error using ==> calllib

Method was not found.

i have Add fuction but when i use libfunctionsview it shows me an error :

>> libfunctionsview('t1')

??? Error using ==> libfunctionsview at 47

No library t1 can be located or no functions for library t1

Any suggestions on what is wrong?

[Image Analyst]

It thinks you don't have an add method. Post the contents of the h file.

[Kaustubha Govind]

Either that or MATLAB couldn't load your library. Try:

[notfound, warnings] = loadlibrary('t1', 't1header.h')

[Mahnaz]

>> [notfound, warnings] = loadlibrary('t1', 't1header.h')

Warning: No functions found in library.

> In loadlibrary at 444

notfound = 

     Empty cell array: 1-by-0

warnings =

       ''

t1header is:

#ifndef _T1_HEADER_H_

#define _T1_HEADER_H_

#if defined DLL_EXPORT

#define DECLDIR __declspec(dllexport)

#else

#define DECLDIR __declspec(dllimport)

#endif

extern "C"

{

     __declspec(dllexport)/*DECLDIR*/ int Add( int a, int b );

     __declspec(dllexport)/*DECLDIR*/ void Function( void );

}

#endif

and this is my source:

#include <stdio.h>

#include "t1header.h"

#define DLL_EXPORT

extern "C"

{

     DECLDIR int Add( int a, int b )

     {
        return( a + b );

     }

     DECLDIR void Function( void )

     {

        printf("DLL Called.\n");

     }

}

[Walter Roberson]

duplicate is at http://www.mathworks.com/matlabcentral/answers/45337-connecting-matlab-to-c-language-dll

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/techdoc/ref/loadlibrary.html

loadlibrary('shrlib', 'hfile') loads the functions defined in header file hfile and found in shared library shrlib into MATLAB. You must select a supported C compiler and Perl must be available.

Notice that the above says "C compiler". Your .h file is written for C++ (which we can tell from the extern "C")

[Kaustubha Govind]

Mahnaz: Also, looks like Titus helped a little with on your previous question which looks like the same issue: http://www.mathworks.com/matlabcentral/answers/45337-connecting-matlab-to-c-language-dll