Object Enablers contain intelligence that allows custom objects (geometry, components, non-graphic objects, and so on) to operate as extensions, or custom objects, inside AutoCAD or another host application. The files that implement these objects are given the extension .dbx, which stands for database extension. A DBX file is basically an ObjectARX application that has been written with no dependencies on AutoCAD-specific APIs.
Object Enablers (DBX files) may link with the following libraries: