Making a control to use witht he scene editor that can be used for collision

I tried searching for my answer, and I feel like my question is simple enough (yet confusing enough) that it should have been asked, but here it goes. All I am trying to do is make a control much like a ghost control. I plan to use it to detect when I am say going into a door (to zone into a new area) or getting close to a ladder. Initially I thought I could just make a new control and extend ghost control. Sadly, when I try and add my “Custom Control” it wont show up… It seems it only likes AbstractControl classes. So thats about the long and short of it. I am not quite sure how I can achieve this.