viewing the certificate services database

Question

Hello All! I need to have access to certificate services database from the c# web application. Approach described in msdn lib(http://msdn.microsoft.com/library/default.asp?url=/library/en-us/seccrypto/security/viewing_the_certificate_services_database.asp) does not seem to work. Or maybe i can't understand what the realy mean... certadm.dll doesn't provide class implementation for IEnumCERTVIEWROW, IEnumCERTVIEWATTRIBUTE and IEnumCERTVIEWEXTENTION. Interface is an abstract entity as far as i know. (Unfortunately i don't know much...) So, how can one (as "ICertView::OpenView creates a IEnumCERTVIEWROW object") create an instance of an interface object with no corresponding class? One version of my code looks something like this: CERTADMINLib.IEnumCERTVIEWROW cvr; CERTADMINLib.IEnumCERTVIEWATTRIBUTE cva; CERTADMINLib.CCertViewClass CertView = new CERTADMINLib.CCertViewClass(); CertView.OpenConnection("pcitis31.cert.cern\\CERTSubCA"); CertView.SetTable(0); CertView.SetResultColumnCount(-2); cvr = CertView.OpenView(); cva = cvr.EnumCertViewAttribute(0); Am i missing something, or am i absolutely on the wrong way? Examples shown in msdn are quite similar(but in vb): ex.1 ' Declare the IEnumCERTVIEWROW object variable. Dim objRow As IEnumCERTVIEWROW ' Instantiate the row object. Set objRow = objView.OpenView ' Use the object as needed. ' When done processing, free the object. Set objRow = Nothing ex.2 ' Initialize an IEnumCERTVIEWCOLUMN object. Dim objCol As IEnumCERTVIEWCOLUMN Set objCol = objRow.EnumCertViewColumn() ' Use objCol as needed. ' ... ' Free objCol when done. Set objCol = Nothing Any help, ideas are very much appreciated! Thanks in advance! Anatoly