UnRegisterTypeLib(ref Guid guid, short majVer, short minVer, int locale, SYSKIND sysKind);
internal static extern void UnRegisterTypeLib([In, MarshalAs(UnmanagedType.LPStruct)] Guid libID, short wVerMajor, short wVerMinor, int lcid, SYSKIND syskind);
private static extern void UnRegisterTypeLib(ref Guid libID, Int16 wVerMajor, Int16 wVerMinor, int lcid, SYSKIND syskind);
private static extern int UnRegisterTypeLib( ref Guid libID, short wVerMajor, short wVerMinor, int lCID, SYSKIND tSysKind);