Dialog inside Addon

Could someone please explain how I can create a Dialog inside an addon?

I've done it inside a mission using description.ext and dialog.hpp / defines.hpp but I'm not too sure how to transfer this across to an addon.

I've tried putting the dialog.hpp and defines.hpp inside the addon and then #include them inside an sqf (the same sqf I use to call CreateDialog).

Any help Would Be Appreciated.

Still need this :/