Choosing either EXE or DLL will create an ActiveX document project that contains a UserDocument. The UserDocument is an object that acts as a foundation for your ActiveX document, and appears similar to a form in a standard EXE project. It looks like a form that doesn’t have a title bar, control box, or min and max buttons. It is the UserDocument object that you’ll use to add controls, hyperlinks, and other objects with which the user will interact.