ener.hlp (Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
MS-DOS Shell (Alt+F,H)
■ Temporarily leaves the programming environment so you can
  use MS-DOS commands. Visual Basic remains in memory.
 
■ To return to the programming environment, type EXIT at the
  MS-DOS prompt and press Enter.
 
■ Tip: While at the command prompt, be careful not to delete
       any files that the programming environment might need
       (for example, loaded files, include files, and
       libraries).