Absolutely! The code sheets for each worksheet, including the one aptly named ThisWorkbook, have special links to their subject and you shouldn't use them for any code that doesn't require these links. While you don't know how to use these links to your advantage that prohibition is rther comprehensive. Here is a tip. These modules capture "events" that occur either in the Workbook or on one of its sheets. You can use such "events" to run code automatically when they occur. Typical such "events" are when the workbook is opened or closed or when a change occurs in a worksheet.