I have a couple of enemy's that the player must kill and they need to keep spawning. A new enemy must be created every 5 seconds (Or random, not important now).

I can create this from lite-C. I just need to know the coordinate of the point where I will spawn the enemy's.

What I would like to do is to create an object in WED where I will attach an action to it that will spawn the enemy's at the object's location. I know I could use a simple object like an invisible cube. But I though that there must be a way to create an empty object.

This is not a big problem, because my 100% Lite-C solution works well and it's not difficult to work with. But using an object can give me more advantages. Like using the skills to store information like, the speed of the enemy's that will spawn or how deadly they will be and change these setting's in runtime easily.


[NOTE]
I don't think the title describes the post well, if someone has a better title please post it.

The title is fine.

I don't understand your problem, what's bad about a passable, invisible (cube) entity?

There is no problem with it. I think that is what I will use. Just asking because, I used to work with an other game engine (2d) and it was possible to create an empty object. Using a cube looks like an work around for this problem to me.

What would be the best way to make the cube invisible?

Ok. In gamestudio, you only can create "empty" objects via script (ent_create(NULL,...)).

Place the object in your level, attach your spawn action and write
set(my,PASSABLE | INVISIBLE);
in your script.
Alternatively, you can set the flags in WED, remove the action and choose a name for that entity. Then you can access the object with "ent_for_name".

I'm using the same sort of object for a spawn point in a project of mine. Check into the "dynamic" flag in manual.