internal extern static bool PFXExportCertStoreEx(
                                             CertificateStoreHandle hStore,
                                             IntPtr pPFX,
                                             IntPtr szPassword,
                                             IntPtr pvReserved,
                                             PfxExportFlags dwFlags);
 internal extern static bool CertAddCertificateContextToStore(
                                             CertificateStoreHandle hCertStore,
                                             CertificateHandle pCertContext,
                                             AddDisposition dwAddDisposition,
                                             [Out]out CertificateHandle ppStoreContext);