VB6 Dynamically Override Crystal Report Property.

I had a legacy VB6 app with Crystal Report 8.5 ran in XP. I'm upgrading it into Windows 7, VB6 and Crystal Report XI.

This old VB6 app used Crystal Viewer a lot, and those canned reports were ODBC Based sitting on a network drive. The old VB6 code that dynamically override the table properties no longer worked. It complained that I don't have the code for DSN Connection. I wonder if there are some sample code that I can follow? Thank you,