Listing 1: Replacing ReleaseDate with GetReleaseDate().

__interface IUltraMax
{
    [id(1), helpstring("Log on")]
    HRESULT LogOn([in] BSTR LoginID, [in] BSTR Password);
    [id(2), helpstring("Get song list")]
    HRESULT GetSongs([out] LONG* Size,
          [out, retval, size_is(, *Size)] SongInfo** Songs);
    [id(3), helpstring("Set song list")]
    HRESULT SetSongs([in] LONG Size, [in, size_is(Size)] SongInfo* Songs);
    [id(4), helpstring("Get next music release date")]
    HRESULT GetReleaseDate([in, out] DATE* CurrentDate);
    // Serialization / deserialization
    [id(5), helpstring("Serializes object to text"), hidden]
    HRESULT ToString([out, retval] BSTR* Text);
    [id(6), helpstring("Deserializes object from text"), hidden]
    HRESULT InitFromString([in] BSTR Text);
};