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This article shows you how to port most useful AutoCAD ObjectARX® API features to ARES Commander plugin. You will learn more about the following topics: Creating ARES Commander plugin Porting User Interface features, such as: • Printing a line to output and requesting user for input • Porting user-defined commands Working with the drawing database Porting ObjectARX custom entity ARES Commander provides API which is almost identical to ObjectARX, but more advanced in some cases, so porting an ObjectARX plugin is a simple and straight-forward task. Creating ARES Commander Plugin ARES Commander plugin is a DLL library that exports several common functions and defines a class similar to ObjectARX entry point to handle plugin events. Most of the job is done by predefined macros. 1. Start with DLL project type 2. Implement ARES module interface #include “OdaCommon.h”#include “RxSysRegistry.h”#include “RxDynamicModule.h” class AresSampleModule : public OdRxModule{public: void initApp(){};};ODRX_DEFINE_DYNAMIC_MODULE(AresSampleModule); 3. Set proper solution platform In this case,