LIB$DO_COMMAND

   The Execute Command routine stops program execution and directs
   the command language interpreter (CLI) to execute a command
   that you supply as the argument. If successful, LIB$DO_COMMAND
   does not return control to the calling program. Instead, LIB$DO_
   COMMAND begins execution of the specified command.

   If you want control to return to the caller, use LIB$SPAWN
   instead.

   Format

     LIB$DO_COMMAND  command-string
 

Additional information available:

Returns         Argument