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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

:nWatchpoint Command (Full Menus Only)
Use to suspend program execution when a condition you
specify becomes true. The condition may be
  ■ A variable name
  ■ A relational statement
 
A relational statement is constructed using the operators
=, <>, >, <, >=, or <=.
 
If you use the simpler form and just enter a variable name
or an expression, QuickBASIC assumes the relation <> 0. For
example, entering X + Y yields the expression X + Y <> 0.
 
Add Watch
    ■ Displays the values of variables as they change
      during program execution
    ■ Does not suspend program execution
A Watchpoint
    ■ Does not display variables' values
    ■ Suspends program execution when the expression
      becomes true