EXITCODE         Produce termination code                           Directive

  EXITCODE [return_value_expr]          ; Ideal or MASM mode                
  .EXIT [return_value_expr]             ; MASM mode

    Produces termination code appropriate for the current operating
    system. You can use it more than once in a module, for each desired
    exit point.

    return_value_expr is a number to be returned to the operating system.
    If you don't specify return_value_expr, the value in AX is returned.