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发表于 2010-12-23 13:53:00
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以下节选ObjectARX帮助文档：
C++
class AcDbLine : public AcDbCurve;
File
dbents.h
Description
The AcDbLine class represents the line entity in AutoCAD. A line object is a 3D object that is specified by its start point, endpoint, and normal vector. In addition, the line object supports thickness along its normal vector direction (that is, height or "extrusion").
这样可以看出类的声明在dbents.h文件中。
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