Custom objects provide additional capabilities to AutoCAD ® and AutoCAD-based products. When the application that created the custom object is not available, a proxy object is substituted in its place.
A custom object is a type of object created by an ObjectARX ® (AutoCAD Run-Time Extension) application, which typically has more specialized capabilities than standard AutoCAD-based objects.
Custom objects include
In addition to Autodesk, many software vendors use ObjectARX to write programs that create graphical and nongraphic custom objects that are useful in their AutoCAD-based applications.
A proxy object is a substitute for a custom object when the ObjectARX application that created the custom object is not available. Later, when the application is available, the proxy object is replaced by the custom object.