In this lesson, you 
- Modularized your code by dividing it among four files. 
 
- Organized your code modules in a Visual LISP project. 
 
- Learned to define a dialog box with dialog control language (DCL). 
 
- Added AutoLISP code to set up and handle input in the dialog box. 
 
- Modified your code to provide users with a choice of boundary line type. 
 
Now you have a program that draws a garden path boundary. In the next lesson, you will add the tiles to the garden path. In the process, you will be introduced to more Visual LISP program development tools.