Learn to use Visual Basic for Applications (VBA), and you can expand the already awesome power of Excel 2010. John Walkenbach, aka Mr. Spreadsheet, shows you how to do it in this easy-to-follow guide.
If you're already an experienced Excel user, this book will make you an Excel master. You'll learn a new approach to Excel and the steps involved in developing a new spreadsheet application. You'll also discover how to develop VBA subroutines and functions, use advanced programming techniques, and more. And if you're switching to Excel 2010 from an earlier version, there's a section to get you up to speed on the new features.
No one can teach you more about Excel than Mr. Spreadsheet.