thx for your answer! > You are going to have to give us a clue why you > should NOT use BYSCL. Is this a religious preference? *g* no, it is a condition for a given exercise. itīs for my first program, iīve to write for a new lecture at my university. so the answer for my question should be quite simple. just 3 or 4 lines... do you have an idea? steffen