What is dlo file actualy do and how to open it?


hello guys,
I know there are a lot of existing answers for dlo file, but none of it makes me clear, so post it here for some more detailed answers.
After searching, I know dlo is for 3ds max plugin-ins, but what dlo actually do? What is the difference between has dlo and not? Because I have coded several small tools only with .ms file, Is that difference workflows?
And How can i open the dlo file?


dll-object, they are used to add new object , the box light dummy etc.
dlo called plugin . ms object called scripted plugin , dlo is more powerful , use sdk to work
if you can hack a c++ dll , you can open it , if not you won’t
most of official dlo’s source code are included in SDK package , you can download them