Just 2 days left to complete the application!

I have a table in database called accountholder and fields in that table known as
intamount(means Intial Amount) and accbalance(Account Balance)

I have a form in visual basic to create a new account, In that field there is intial account field, now the thing that i want to do is :-

When an account is created, The initial amount entered into the database updates the account balance when the acount is created, so is there any code that updates the new account accbalance only and not all the records accbalance in the table.

I'm not getting the sql statement.Please anybody!

Regards,
Muhammad Haris