Loading a DLL file in Matlab

Hi. I will have to load an DLL file into Matlab but I do not have a dll header file. Could someone please give some examples of how to build such header file?

Answer 1

[Sudhanshu Bhatt]

Hi George Alin Raducu,

Unfortunately, it is not possible to load a DLL into MALTAB, without a header file. More information on this can be found in the thread below:

Dynamic Library without a H file

Below are some resources that will help you create a MATLAB function into a C/C++ Shared DLL:

Create a C/C++ Application with MATLAB Code

How do I create a C/C++ shared library with MATLAB Compiler that can be used in a Microsoft Visual C++ 2005?

Information on how to integrate the C/C++ Shared Library into your application:

Integrate a C/C++ Shared Library into an Application

Calling Functions in Shared Libraries

Also, there are some limitations to Shared Libraries integration with MATLAB:

Limitations to Shared Library Support

Hope this helps!

Thanks

Sudhanshu Bhatt

[George Alin Raducu]

 Hi,
Thank you very much for your information. I tried to build my own header file and create an S-function in order to load the DLL but I when I'm running the simulation I get only NULL outputs. I guess that I'm doing something wrong therefor I attach my header and c files. Would be great If someone could comment on these files.    
Thank you very much!!

Answer 2

[Madison Radford]

As Sudhanshu mentioned, it is not possible to load a DLL into MATLAB without a header file.

If you want to generate a C/C++ library from a MATLAB function that includes both a DLL and a header file, see C Shared Library Integration and C++ Shared Library Integration.

As of MATLAB R2022a, the recommended way to call functions in C and C++ libraries is to publish a MATLAB interface to the library. For more information, see Call C/C++ from MATLAB.

If you are using MATLAB R2021b or earlier, you can load functions from a C shared library. For more information, see Call C from MATLAB.

Note that both of these methods require a header file.

There are some limitations to Shared Libraries support in MATLAB, which is why we recommend you use a MATLAB interface to the library.