What problems are you facing ?
There are many ways to connect to an Oracle database from Visual Basic, so you might want to share with us your code so we can provide more specific help.
Here are a couple of PDFs you may find useful:
<a href=”http://www.johnsmiley.com/cis18/Smiley003.pdf”>Connect to an Oracle Database from within Visual Basic 6 (Part 1)</a>
<a href=”http://www.johnsmiley.com/cis18/Smiley004.pdf”>Connect to an Oracle Database from
Visual Basic 6 (Part 2)</a>