Release 10.1A: OpenEdge Development:
Basic Development Tools

> ## Application Compiler

> The Progress Application Compiler utility lets you compile a set of source procedures (`.p` files) either for the duration of an OpenEdge session (or until OpenEdge runs out of directory entries) or for permanent storage. For a session, OpenEdge creates temporary r-code files. For permanent storage, OpenEdge creates r-code files that inherit the name of the source file and a .r extension by default. Once you compile a procedure, it does not get recompiled when you run it, so the procedure runs quickly. For more information on r-code, see OpenEdge Development: Progress 4GL Handbook .

> This chapter contains the following sections:

> - Starting the Application Compiler

> - Using the files/directories selection list

> - Using the toggle boxes

> - Using the action buttons

> - Using the menu bar

> - Compiling source files

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