Dime程序源码，包含Dxf文件分类结构以及每一种元素类型的源码，适合CAD软件开发人员参考学习-Dime program source code contains the the Dxf file classification structure as well as the source of each element type, suitable for CAD software developers of learning

用cad内置命令及通过句柄取得图元CsMgdAcad2-Element CsMgdAcad2 get built-in commands and by using cad handle