It is possible to run the WordSmith routines from your own programs; for this there's an API published. If you know a programming language, you can call a .dll which comes with WordSmith and ask it to create a concordance, a word-list or a key words list, which you can then process to suit your own purposes.
Easier, however, is to write a very simple batch script which will run WordSmith unattended.
See also : custom processing