I am working on creating an inventory system for the player in my game. I have absolutely no idea where to start on this, so I found this tutorial online here dealing with making an inventory system in Gamestudio A8:

http://opserver.de/nwik5/index.php?title=Inventory.c_docs

I tried putting the code from this tutorial into my program, and running it. I am getting an error stating that "include inventory.c file not found". I guess inventory.c is not an include function. Was inventory.c a manually programmed include function?