AcDbBlockBegin

Class Hierarchy

AcRxObject
    AcGiDrawable
        AcDbObject
            AcDbEntity
                AcDbBlockBegin

C++

class AcDbBlockBegin : public AcDbEntity;

File

dbents.h

Description

The AcDbBlockBegin class represents the block header portion of a block definition within AutoCAD (that is, group codes 2, 3, 10, 20, 30, and 70). Objects of this class are created and handled automatically by AutoCAD for each AcDbBlockTableRecord.

Applications do not need to create objects of this class nor can they add or remove them from databases. Applications are free to add or manipulate xdata on objects of this class as well as work with extension dictionaries for objects of this class.

Notes

The following members are not and will not be implemented for this class, since objects of this class have no associated geometry.

• AcDbEntity::explode()
• AcDbEntity::getEcs()
• AcDbEntity::getGeomExtents()
• AcDbEntity::getGripPoints()
• AcDbEntity::getOsnapPoints()
• AcDbEntity::getStretchPoints()
• AcDbEntity::intersectWith()
• AcDbEntity::moveGripPointsAt()
• AcDbEntity::moveStretchPointsAt()
• AcDbEntity::transformBy()

Do not derive from this class. Attempting to do so will cause your application to halt AutoCAD.

See Also

AcDbSequenceEnd, AcDbBlockEnd, AcDbObject