In my existing system of FutureBasic programs (originally developed in OS 9 and earlier), I make extensive use of the FOLDER function. I have to dynamically determine if a given folder exists, and if not, create it; and either way, get the "volrefnum" to enable me to create or access a file therein. I've been able to run most of these programs successfully on OS X after minor tweaking of the code that tests the results of the FOLDER function. I am always in a position to specify the full path name, for both the folder/directory I need to create/access and the file name within that directory, but I don't know how to dynamically test to see if the folder already exists and if not, create it in a way that FBtoC will accept. Can someone please point me in the right direction?