How to use already created database? - vb6

How to select a same database?
I want to create a table from already created database.
Using vb6
My code.
Set db = DBEngine.CreateDatabase("1.mdb", dbLangGeneral)
I don't want to create database, I want to used already created database, so 1.mdb is already created. I want to use the 1.mdb database
How to modify a code?
Need vb6 code Help

Here you go.
Dim db As DAO.Database
Set db = DBEngine.OpenDatabase("Northwind.mdb")

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I've database with 15 tables. Now due to development process one column has to added to all the tables in the database. This changes should not affect the existing process because some other services are also consuming this database. So to accomplish it I thought of creating a new database. Is there are any other way to do it.
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