Progress Developer Studio for OpenEdge provides wizards for creating commonly used ABL file types:
These wizards create files with placeholders and default values and comments for commonly used code sections, simplifying the process of setting up a variety of source files. If you prefer, you can create a new blank file and enter all of the content yourself. As long as you use a file extension that is associated with the ABL Editor, you can use the ABL Editor functions when working with it.
To create a new source file: