I use the environment cad2018 + objectarx2018 + vs2015 + win10. First install the desk wizard, create a project for beginners is very easy to use wizard, and then configure the program compile and link the environment, you can write a final project. Here I built two projects, one project is to provide regular input commands, and the other is a custom entity project.
Both projects created to set dependencies.
Finally, the project is compiled and linked, to note here is that the output file path of the two projects can not be the same path, or compile one time will put another overwritten, and use the time appload loaded in cad2018, you need to load the dbx suffix file, which is our custom entity, then the file is loaded conventional arx suffix.
Second, you need to configure the file path dependence conventional projects.
Then use the wizard to create a custom entity project.
Here a custom entity in the project has been created.