Container Names in RSACryptoServiceProvider class

Can anybody help me to know where to find the right Container Name that must be used to encrypt data using the public key of one of the certificates stored in the "AddressBook" certificate store? Now I'm using this code, but it permits me to use just the first of the certificates stored in the "AddressBook":

objCSPParam = New CspParameters(CAPICOM_PROV_TYPE.CAPICOM_PROV_RSA_FULL, "Microsoft Enhanced Cryptographic Provider v1.0", "AddressBook") objRSACSP = New RSACryptoServiceProvider(objCSPParam)

Maybe using the filenames of C:\Documents and Settings\{UserName}\Application Data\Microsoft\Crypto\RSA would help me? How?

Thanks in advance,

                            Massimo