There is not currently a scripting language to extend the capabilities of the TeleFlow Designer. The Designer itself is a language of sorts that creates "scripts" (.tap and .tam files) that TeleFlow Server executes. There are a number of ways you can extend the functionality the TeleFlow provides through the Server. You can create DLL's that can be called by TFServer (see the RunDLL step). You can transfer information between TFServer and other applications via XML, database read/writes or simple flat files. Lastly, you can suggest the new functionality you desire and perhaps it will be available in future versions.