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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

Turn this toggle on when you want the QBX environment to:
  ■ Run your program in slow motion, highlighting each
    statement as it executes
  ■ Record the last 20 lines of program code executed
    before a program stops
 
This lets you observe the general flow of your program.
Use with watchpoints, breakpoints, or Ctrl+Break to
suspend program execution periodically.
 
Then use Shift+F8 and Shift+F10 to single-step backward
and forward through the last 20 lines of code.