error in using calllib function

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Mahnaz
Mahnaz 2012-8-17
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?
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Mahnaz
Mahnaz 2012-8-17
编辑：Walter Roberson 2012-8-17
>> [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");
}
}

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回答（1 个）

Walter Roberson
Walter Roberson 2012-8-17
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")

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