Two questions: (1) more info on VAT ~ where is the program name stored. Why does the code in Zlib Detect need all that stuff if only hl, de, and a few other varibles are used. (2) Where can I find James' tutorials. Whats his site URL? From: Chris mecad@scv.net Sharper Research http://www.scv.net/~mecad/graphics/ti83.html