To permit maximum flexibility for your application, you might want to start OpenEdge without connecting to a database. For example, you can start OpenEdge and name a startup procedure, such as a main menu procedure. This startup procedure (or a procedure that it calls) can connect to a database based on an end user's menu selection. To start OpenEdge without connecting to a database, execute the OpenEdge startup command without specifying a database name. On UNIX, use the PRO command; in Windows, use the PROWIN32 command. For more information about startup commands, see Startup Command and Parameter Reference.