This section describes how to derive a custom class from AcDbEntity, and includes specific examples of overriding virtual methods provided by the AcDbEntity class. Overriding common entity operations, such as object snap points, grip points, and stretch points, is also discussed in this section.
The material in this section assumes you are familiar with the material presented in Entities, Deriving a Custom ObjectARX Class, and Deriving from AcDbObject.