Components of the AutoCAD .NET API

The AutoCAD .NET API is made up of different DLL files that contain a wide range of classes, structures, methods, and events that provide access to objects in a drawing file or the application. Each DLL file defines different namespaces which are used to organize the components of the libraries based on functionality.

The main DLL files of the AutoCAD .NET API that you will frequently use are:

AcCoreMgd.dll. Use when working within the editor, publishing and plotting, and defining commands and functions that can be called from AutoLISP.

AcDbMgd.dll. Use when working with objects stored in a drawing file.

AcMgd.dll. Use when working with the application and user interface.

AcCui.dll. Use when working with customization files.