i want to know to to apply usa visa(for study)

find a school in US.
file the application to the school with all the suport documents.
once the school accpeted you, they will give you an i - 5 for visa application.
submit the i-5 and your student visa application to US embassy for visa.
student visa is not a pass, and nothing in USA is called free. you have to pay for all the school expenses.
how much? i will said about 20,000 to 40,000 USD..a year.

2008-11-16 11:50:03 補充：
live in US over 30 years

1. You need to find a school.

2. The school must admit you.

3. The school will issue necessary documents for your visa application.

4. Apply your visa at the U.S. Consulate in Hong Kong with necessary document.

Study is not free. How much do you need depends on the school you choose.