How to import a C++ dll in Matlab - c++

Question

I'm struggling with the importation of C++ (2017) dlls in Matlab (2019a).
In particular, since I'm not familiar with C++, I tried to create the MathLibrary defined in https://github.com/MicrosoftDocs/cpp-docs/blob/master/docs/build/walkthrough-creating-and-using-a-dynamic-link-library-cpp.md.
I created the library according to the guide, compiled both Debug and Release (x86), and the import with the MathClient described works fine.
However, I tried to import the library in Matlab (after adding the needed folders to the current path) with:
if libisloaded('MathLibrary') == 0
handle = loadlibrary('MathLibrary.dll','MathLibrary.h');
end
and it throws a tons of errors:
Warning: Message from C preprocessor:
cl : command line warning D9027: source file 'C:\Users\miche\source\repos\MathLibrary\Release\MathLibrary.lib' ignored
cl : command line warning D9021 : no operation performed
> In loadlibrary
Error loading library intermediate output follows.
The actual error is at the end of this output.
*********
Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.30), passed through in regex; marked by <-- HERE in m/struct([^;,{(]*){ <-- HERE (.*?)\}([^;])*;/ at D:\Program Files\MATLAB\R2019a\toolbox\matlab\general\private\prototypes.pl line 912.
Warning no reference to header 'MathLibrary' added with addheader was found in source.
*********
Error using loadlibrary
Building MathLibrary_thunk_pcwin64 failed. Compiler output is:
cl -I"D:\Program Files\MATLAB\R2019a\extern\include" /Zp8 /W3
/nologo -I"D:\Program Files\MATLAB\R2019a\bin"
-I"C:\Users\user\source\repos\MathLibrary\Release"
"MathLibrary_thunk_pcwin64.c" -LD
-Fe"MathLibrary_thunk_pcwin64.dll"
MathLibrary_thunk_pcwin64.c
C:\Users\miche\source\repos\MathLibrary\Release\MathLibrary.lib(1):
error C2059: syntax error: '!'
C:\Users\miche\source\repos\MathLibrary\Release\MathLibrary.lib(2):
error C2018: character '0x60' unknown
and then it just goes on like this, with a lot of character errors.
What is wrong with my code? How do I solve this?