Description
This .Net class wraps AcDbUnderlayReference ObjectARX class.
UnderlayReference is an abstract class that represents underlays in the drawing. Underlays are similar to raster images, but their content is snappable. An UnderlayReference object must reference a compatible UnderlayDefinition object.
The UnderlayReference object is responsible for the placement of the content within the drawing, while the UnderlayDefinition object handles the linkage to the underlay content. Instances of UnderlayReference-derived concrete classes are inserted into a block table record. Instances of UnderlayDefinition-derived concrete classes are inserted into a dictionary under the named object dictionary.
Class Hierarchy
Autodesk.AutoCAD.DatabaseServices.DBObject Autodesk.AutoCAD.DatabaseServices.Entity Autodesk.AutoCAD.DatabaseServices.UnderlayReference Autodesk.AutoCAD.DatabaseServices.DgnReference Autodesk.AutoCAD.DatabaseServices.DwfReference Autodesk.AutoCAD.DatabaseServices.PdfReference
Visual Basic
Public abstract Class UnderlayReference Inherits Entity
C#
public abstract class UnderlayReference : Entity;