Library /sys$common/syshlp/dbg$uihelp.hlb DEBUGUI, ha_window_start  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  You can invoke the heap analyzer during a debugging session in one of
  the following ways:

   -  In the debugger main window, choose the Run Image or Rerun Same
      items from the File menu.  When a dialog box appears, select the
      program you wish to execute and click the heap analyzer toggle
      button.

   -  At the debugger command entry prompt, enter the RUN/HEAP_ANALYZER
      or RERUN/HEAP_ANALYZER command.

   -  At the DCL prompt ($) in a DECterm window outside the debugger,
      enter the following commands and then execute your program:
      $ DEFINE/USER LIBRTL SYS$LIBRARY:LIBRTL_INSTRUMENTED

  (You can invoke the heap analyzer outside a debugging session by
  entering the DEFINE/USER command detailed above, and then the DCL
  command RUN/NODEBUG.)

  After you successfully invoke the heap analyzer, the heap analyzer
  startup screen appears.