Go to the Ontario Universities' Application Centre website and select the appropriate application. If you're in secondary school, complete OUAC 101, while if you're out of school and a Canadian citizen, you must complete OUAC 105D. International students should use form OUAC 105F.
Contact your high school or previous college and ask them to to send your transcript to Brock.
Submit your proof of English language proficiency if you have English as a second language.
Mail any other documents specified in the OUAC necessary for application to:
Brock University - Office of the Registrar - Admissions
500 Glenridge Avenue
St. Catharines, ON L2S 3A1.