       1mexecl 22m?1m-argv0 22margv0? 4mprog24m ?4marglist24m?
              Do  an execl, replacing the current program (either Extended Tcl
              or an application with Extended Tcl embedded into it) with  4mprog0m
              and passing the arguments in the list 4marglist24m.

              The  1m-argv0  22moptions specifies that 4margv024m is to be passed to the
              program as argv [0] rather than 4mprog24m.

              Note: If you are using 1mexecl 22min a Tk application and  it  fails,
              you  may  not do anything that accesses the X server or you will
              receive a 1mBadWindow 22merror from the X server.  This includes exe-
              cuting the Tk version of the 1mexit 22mcommand.  We suggest using the
              following command to abort Tk applications after an 1mexecl  22mfail-
              ure:

                  kill [id process]

              On  1mWindows22m,  where  the  1mfork  22mcommand  is not available, 1mexecl0m
              starts a new process and returns the process id.
