Hi Steve, > I’ve closed Zerobrane & re-opened it and was expecting to be able to type > “st.” to get the list of Log & SleepMillis as autocomplete options, but > didn’t. Am I using it wrong? I followed > http://studio.zerobrane.com/doc-api-auto-complete.html. The structure of the files you have looks good, but you seem to have a syntax error in test.lua file; when you start ZBS you should see a message in the output window: "Error while loading API file: api\lua\test.lua:14: '}' expected (to close '{' at line 7) near 'SleepMillis'". After fixing it, the files work for me as expected. There is a bit simpler way to do this that avoids modifying luabase.lua file, but it requires a couple of small changes to ZBS that should be available in few days. Paul.