TRON and TROFF Statements Details
 
Syntax
  TRON
  TROFF
 
In the QuickBASIC environment, executing a TRON statement has the same
effect as selecting Trace On from the Debug menu--each statement is
highlighted on the screen as it executes.
 
The TROFF statement turns off the program trace.
 
The TRON and TROFF statements only display line numbers when compiled
with the Debug option or the /D option on the BC command line.
 
  Note: The debugging features of the QuickBASIC environment make these
        statements unnecessary. See the <DEBUGGING KEYS>        for more
        information.