You can open an existing ABL GUI procedure (.w) file with the ABL UI Designer or ABL Editor.
To open an ABL GUI procedure (.w) file:
1. In the Project Explorer view, right-click a procedure file name and select Open With from the context menu.
2. Choose one:
OpenEdge ABL Editor to display the source code.
ABL UI Designer to display the design editor.
Alternatively, you can simply double-click the procedure file in the Project Explorer view. Progress Developer Studio for OpenEdge opens the procedure file either in a ABL UI Designer editing window or in the ABL Editor, whichever you last selected when opening the file with the Open With command. If you have not previously used Open With for the file, by default it opens in the ABL UI Designer.
Note: You cannot open multiple instances of the same file in the ABL UI Designer.
OpenEdge ABL Editor to display the source code.