■ Designates the initial execution location or start-up
  file for multiple-module projects. The first executable
  statement in the start-up file is always the first
  statement executed.
 
■ If the start-up file is a form (.FRM) module, an implicit
  DOEVENTS() function occurs. If the start-up file is a code
  (.BAS) module, you must:
    • Explicitly start a DOEVENTS loop
    • Use the SHOW method to show the first form to start
      the Form Designer
 
■ To set the start-up file:
    1. Select the module you want to be the start-up file
       (all loaded modules are displayed in the Choose new
       Start-up file list box).
 
       Choose new Start-up file:
       ┌──────────────────────────────────────────┐
       │ THIS1.BAS                                ↑
       │ THAT1.BAS                                ░
       │ O4FUN.BAS                                ░
       │ RUND.BAS                                 ↓
       └──────────────────────────────────────────┘
    2. Press Enter or choose OK to set the start-up file,
       ╔════════╗
       ║   OK   ║
       ╚════════╝
       or choose one of the following:
       ┌────────┐
       │ Cancel │  To cancel the operation
       └────────┘
       ┌────────┐
       │  Help  │  To get help
       └────────┘