Help with reading the functions inside a library

Is there a reason why the code below cannot find the dll that IS in the directory as shown (there is also the h file with the same name)

          [file,path] = uigetfile('C:\Users\Public\PI\PI_Programming_Files_PI_GCS2_DLL\*.dll');
          libname=fullfile(path,file)
          %Remove the extension
          [path,name,ext] = fileparts(libname)
          %Rebuild without Ext
          libname=fullfile(path,name)
          hname=fullfile(path,name) %Dont need this if same name
          
          loadlibrary('libname')
          libfunctionsview libname
          

Error using loadlibrary
Could not find file libname.h.

Error in loadlibrary

(here are the library and header files)

Answer 1

[Rik]

You first store a filename in a variable, but then you use the Name of the variable to call loadlibrary.

loadlibrary(libname);%this should work better

[Jason]

Now Im gettng

libname =

    'C:\Users\Public\PI\PI_Programming_Files_PI_GCS2_DLL\PI_GCS2_DLL'

Error using loadlibrary
Could not find file PI_GCS2_DLL.h.

Error in loadlibrary

[Rik]

The function requires a header file as well. I am not familiar enough with this to know what it should contain, but at least you are now passing the actual file name to the loadlibrary function.

[Jason]

thanks Rik, the header file is the same name so according to the documentation its not needed.

Strangely, it only seems to works when I do use the hfile name as well as use an alias

hname=libname;
loadlibrary(libname,hname,'alias','lib')

[Rik]

From your screenshot it looks like your header file doesn't actually have an extension, while the error indicates Matlab expects a .h file. But glad you solved it.

[Image Analyst]

Did you thunk it?

https://www.mathworks.com/matlabcentral/answers/?search_origin=ans_leaf&term=thunk

[Jason]

Forgive me, but what does 'thunk it' mean