WB3 - Corel Quattro Pro 7 and 8 File is a file extension that is available for download online when you are ready. This wonderful extension is perfect for spreadsheet programs that you will find in WordPerfect Office. There are many different types of data, charts, and calculations that you can get out of these extensions. If you want to invest into some conversion, this extension will take care of it all for you. You will not experience any problems. If you are using Corel, you may want to take using this into consideration. Again, you will get a converter right along with the extension for Excel and other programs once you download it.