This paper discusses the development of a Generic Interface that will enable traditional non-object-oriented applications to become HLA compliant. By providing for both DIS and HLA, the proposed interface can support not only new but existing or legacy software applications as well. In addition, the interface will make it easy for simulation applications that today require a standard networking protocol as a backbone to use DIS components in place of corresponding HLA components as an interim solution. After a general overview of the concept of a Generic Interface, the paper then proceeds with a description of the interface components and how they can be used to harmonize the various applications involved in a simulation.