If my workbook has 3 windows, called A,B and C (their names will vary) and Windows(1) is always the active window (let's say it's A at present), then how do I know if Windows(2) corresponds to B or C? Had a right load of fun with it this afternoon. Then I add a new window. What's the computer going to call that, and what index number will that one be referred to by? It seems to be making it up as it goes along.