Byung-hoon has attended:
Excel Advanced course
Excel VBA Intro Intermediate course
Useful materials
Can you recommend any supplemtary books on using Excel VBA? easy to read and follow up with?
RE: useful materials
You might consider something like:
http://www.amazon.co.uk/Excel-VBA-Easy-Steps/dp/1840782714
Depending on your application, you might find other books more indepth or applicable to your situation.