All applicants send their full applications to CIO in Sidney, Nova Scotia now. If you meet the minimum requirements your application is then forwarded to your specified Visa Office. You will have to get acquainted with the rules and regulations well. Complete your application EXACTLY as they request. You will find addresses at the end of the instruction guide. It is advisable to send your application with a reputable courier service so that you have a tracking number for your application. CIO does not acknowledge receipt of your application, so the tracking number is your life line. Read the thread Applications after 26/6 on the Forum and you will get all sorts of useful tips...especially in the first 3-400 pages of that thread. Good luck.
http://www.cic.gc.ca/english/information/applications/guides/EG72.asp