How to determine the database driver a report uses?

Hello experts.  I'm using Crystal Report XI R2 and C# (.net 4.0 runtime).
For a given report, I'd like programmatically determine what database driver(s) a report and it's sub-reports use.  The nice thing is that I don't want to change it.
When I refer to database drivers I'm talking about the choices one gets when starting a new report in the Crystal UI.  Something like the following:
Access/Excel (DAO)
ADO.NET (XML)
Database Files
ODBC (RDO)
OLE DB (ADO)
I've looked into the developers help file that came with Crystal XI R2, crsdk_net_doc.chm, and can't find any references that would help.  Maybe it's what I'm searching on.
My goal is for a given directory produce a list of rpt files that use OLE DB and a MS-SQL Server provider.
Thanks for looking at my question, any assistance is appreciated.
Mike

Also note since you are using 4.0 framework you must also be using VS 2010.
CR for VS 2010 is the only version supported with 4.0 framework.
See this page to download it: http://www.sdn.sap.com/irj/boc/crystalreports-dotnet
Or go back to VS 2008.
Code would look something like this:
     public class frmMain : System.Windows.Forms.Form
        CrystalDecisions.CrystalReports.Engine.ReportDocument rpt = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
        CrystalDecisions.ReportAppServer.ClientDoc.ISCDReportClientDocument rptClientDoc;
New subrepoutine...
            ISCDReportClientDocument rcd;
            rcd = rptClientDoc;
            CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo oldConninfo;
            CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo newConnInfo = new CrystalDecisions.ReportAppServer.DataDefModel.ConnectionInfo();
            CrystalDecisions.ReportAppServer.DataDefModel.Table oldTbl;
            CrystalDecisions.ReportAppServer.DataDefModel.CommandTable newTbl = new CommandTable();
            oldTbl = (CrystalDecisions.ReportAppServer.DataDefModel.Table)rcd.Database.Tables[0];
            oldConninfo = oldTbl.ConnectionInfo.Clone(true);
Thank you
Don

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