Finally, there's a book that treats Excel as the powerful development platform it really is, and covers every facet of developing commercial-quality Excel applications. This is not a book for beginners. Writing for professional developers and true Excel experts, the authors share insider's knowledge they've acquired building Excel applications for many of the world's largest companiesincluding Microsoft. Professional Excel Development demonstrates how to get the utmost from Excel, addressing everything from application architectures through worksheet and userform design, charting, debugging, error handling and optimizing performance. Along the way, the authors offer best practices for every type of Excel development, from building add-ins through interacting with XML Web services.