How to Learn Excel VBA Online

1. Learn Excel VBA. Look for nonmacro solutions before you start messing with VBA. If you don't know Excel's capabilities well, you're likely to write macros that do things you could accomplish instead with good spreadsheet design and a few mouse clicks.
2. Navigate to Microsoft's VBA for Excel 2003 training page. There is no equivalent page for Excel 2007, but you won't need version-specific knowledge until you've mastered the fundamentals of VBA.
3. Watch the introductory videos and work through the textual tutorials that introduce programming with VBA. There are three courses. Complete them, do the practice sessions and take the tests.
4. Complete the VBA tutorials at xlpert.com and xl-vba.com. Xlpert offers a free eight-lesson course, while xl-vba's course has 23 lessons. The writing doesn't sparkle and there's a lot missing (to encourage you to buy a complete course), but the material will reinforce what you learned from Microsoft's site. Repetition is useful when learning a new language.
5. Build a spreadsheet that does something useful for you, then turn it into a macro-driven application. When you feel stymied--and you will from time to time--press the F1 key to activate Excel VBA's help system. You can learn VBA entirely from the help system, but it would be very hard if you're not already a programmer.
6. Visit Microsoft's developers' forums to research problems and ask questions of other programmers. A link below leads to the forums page where you'll find a list of several Excel-related discussion groups.