Crystal Report with VS 2005

Hello,
I have my application created on VB.NET using SQL server 2008 R2. We have used crystal report for our data to view extensively. We have used connectionInfo interface class to build trusted and sometime non-trusted connection based on input to display data from SQL. We have newly implemented Database application role in our application to limit the access of user to the DB level. How can we implement Database application Role in case of Crystal Report while working with connectionInfo.

Thanks in advance looking forward to have positive response.

Regards,
Salman Momin