用lisp语言编写的双侧堤坝，只需在cad中的命令栏输入命令后，根据用户的需求在图上指定相应的点即可。-Written with a lisp bilateral dam, just enter the command bar cad in the command, according to the needs of the user specified in the corresponding point on the graph can be.

自己话的一个aotoCad 的文件，还不错啦，可以本科交差了，觉得oK就下吧。-If a aotoCad own documents, the good thing is, you can cross the course, I feel oK on the next bar.

简单画图程序的实现，浮动工具栏，右键快捷菜单，状态栏，颜色对话框，设置对话框，文件保存与重现，橡皮筋技术实现，变换图标-The realization of a simple drawing program, a floating toolbar, context menu, status bar, color dialog, set the dialog box, save the file and reproduce, the rubber band technique.

创建和显示CAD的Controlbar。内嵌一个对话框，可以响应控件消息。代码非常简洁，有注释，便于学习和理解。个人。-Create CAD controlbar.There is a Inner embedded dialog can respose.It is helpful to learn cad control bar and arx.