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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

  Use the Set Breakpoint command to stop execution at a
  certain point in your code and return control to you.
  The shortcut key is F9. When you choose Set Breakpoint,
  a box pops up that gives you several options for
  inserting breakpoints into a source window:
 
    ■ Break at Location creates a breakpoint either at the
      line the cursor is on or with the line set in the
      Location text box.
    ■ Break at Location if Expression is true will break
      on a specified line only if the expression entered
      in the Expression text box is true.
    ■ Break when Expression is true will break on the
      source line that causes the expression in the
      Expression text box to be true.
 
  To set a breakpoint by line number, you should use the
  Location text box. Type a file path and line number,
  for example, C:\QPASCAL\ERRHDL.PAS(458); then select
  < OK >.
 
  To set a breakpoint by expression, you should use the
  Expression text box. Enter a variable and an
  expression that will return a Boolean value (for
  example, the_amount = 76), then select < OK >.
 
  Once you set a breakpoint and run the program, execution
  will pause immediately before the specified line. You
  can then
 
    ■ Press F8 to trace into a procedure or function
    ■ Press F10 to step over a procedure or function
      to the next statement
 
  To remove or change a breakpoint, you can use the
  Edit Breakpoints command in this menu.