Microsoft Visual Studio 2015/2017/2019 development environment is recommended for working with NetSim protocol source codes.
You can further configure the type of build required, based on whether a 32 or 64-bit NetSim is installed.
For implementing your own code you can add new or existing c files to the projects.
Properties of the project can be used to include additional headers and library files to the project.
For Example, In case of interfacing NetSim with MATLAB, we will have to include headers and library files of MATLAB additionally.
Netsim R&D projects using MATLAB is available at https://tetcos.com/file-exchange.html