Class Hierarchy
AcRxObject AcGiDrawable AcDbObject AcDbEntity AcDbViewport
C++
class AcDbViewport : public AcDbEntity;
File
dbents.h
Description
The AcDbViewport class represents the VIEWPORT entity within AutoCAD.
Notes
Do not derive from this class. Attempting to do so will cause your application to halt AutoCAD.
Most AcDbViewport properties are reset to default values when the viewport is appended to a database. Therefore, you should always wait until you have added a new AcDbViewport object to the database before you change its property values.