The CERT_RDN structure is a Relative Distinguished Name (RDN) which consists of an array of CERT_RDN_ATTR structures.
typedef struct _CERT_RDN {
DWORD cRDNAttr;
PCERT_RDN_ATTR rgRDNAttr;
} CERT_RDN, *PCERT_RDN;
CERT_NAME_INFO, CERT_RDN_ATTR, CertFindCertificateInStore, CertIsRDNAttrsInCertificateName, CertNameToStr