IntPtr store = CertOpenSystemStore(0, CERT_STORE_NAME);

        hSysStore = WinCapi.CertOpenSystemStore(IntPtr.Zero, MY) ;

static extern IntPtr CertOpenSystemStore(IntPtr hCryptProv, string storename);

    Private Shared Function CertOpenSystemStore( _

    HCERTSTORE   WINAPI CertOpenSystemStore(HCRYPTPROV hprov, LPTCSTR szSubsystemProtocol);

    public static extern IntPtr CertOpenSystemStore(

        hSysStore = WinCapi.CertOpenSystemStore(IntPtr.Zero, MY);