Vb.net Connection through code with Seagate Crystall report Version 8

[magesh21]

Hi,
I am using Seagate Crystall report 8.0 , Vb.net 2003,ODBC3.51 and MySql 4.1 as Backend

Please tell me how to connect Crystall report through code in vb.net.
And also please tell me how to do it for subreports ,
what are the dll files required for connection through code (DSN).
I am using Crviewer to view reports.

thanks,
regards,
mageshkumar