link .dll files with matlab

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Jo 2015-5-27

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评论： Dasharath Gulvady 2015-5-29

采纳的回答： Dasharath Gulvady

hi I have some .dll files and I would like to link them with Matlab. Is there a way to load and read them in matlab?

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Answer 1

Dasharath Gulvady 2015-5-28

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You can use "loadlibrary" function to load and use the functions from a C/C++ DLL in MATLAB.

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

You can use "NET.addAssembly" to load a global .NET assembly in MATLAB:

http://www.mathworks.com/help/matlab/matlab_external/load-a-global-net-assembly.html

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Jo 2015-5-29

Hi! many thanks for your answer. I tried using "loadlibrary" but I got this error:

"Error using loadlibrary (line 253) A 'Selected' compiler was not found. You may need to run mex -setup."

I used the ext=mexext and found out that ext = mexw64

The problem is that my files have to be used with the 32-bit version of IDL. If they can be read by Matlab it would also have to be a 32-bit version of Matlab.

Any ideas?

many thanks in advance

Dasharath Gulvady 2015-5-29

If your DLLs are 32-bit, then you can only load them on a 32-bit MATLAB. In any case, you have to select a compiler using "mex -setup"

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Answer 2

B.k Sumedha 2015-5-29

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编辑：B.k Sumedha 2015-5-29

It looks like you are using a MEX-function which used to have a .dll extension in very old releases of MATLAB. They now have extensions like mexw32, mexw64, etc. You can call these files directly like any other MATLAB function - there is no need to use LOADLIBRARY.

In any case, the issue is that MEX-files are platform-specific - the one you have is compiled for 32-bit Windows, so it won't be recognized on 64-bit MATLAB. If you have the source code corresponding to the file, you can use the MEX command to re-compile it for 64-bit Windows. Alternately, you can install 32-bit MATLAB on your 64-bit machines to run the 32-bit MEX-file. See How can I install 32-bit MATLAB on my 64-bit Windows machine? in matlab