private static extern GgsError GGS4GetSmfInformation(ref SmfInformation info, int size, int musicId);
// SMFの情報を取得
public GgsError GetSmfInformation(out SmfInformation info, int musicId)
{
info = new SmfInformation();
return(GGS4GetSmfInformation(ref info, Marshal.SizeOf(info), musicId));
}
