Hello Craig

You could could consider setting an attribute on the file after you have done your processing on the file.

Set the read only flag for example. I only know how to do this by shelling out to the DOS ATTRIB command but I am sure there are better ways in Fox or in the API.

Once this is set you can use the ADIR() command to determine if you have processed the file previously or not by checking if the file is read only.

Hope this helps.