private void ExportButton_Click(object sender, EventArgs e)
        {
            string title  = R._("保存するファイル名を選択してください");
            string filter = R._("sound|*.s;*.mid|s|*.s|midi|*.mid|MusicalInstrument|*.instrument|SondFont|*.sf2|All files|*");

            string songname = "song" + U.ToHexString(AddressList.SelectedIndex);

            SaveFileDialog save = new SaveFileDialog();

            save.Title        = title;
            save.Filter       = filter;
            save.AddExtension = true;
            Program.LastSelectedFilename.Load(this, "", save, songname);

            DialogResult dr = save.ShowDialog();

            if (dr != DialogResult.OK)
            {
                return;
            }
            if (save.FileNames.Length <= 0 || !U.CanWriteFileRetry(save.FileNames[0]))
            {
                return;
            }
            Program.LastSelectedFilename.Save(this, "", save);
            string filename = save.FileNames[0];

            int  NumBlks         = (int)B1.Value;
            int  Priority        = (int)B2.Value;
            int  Reverb          = (int)B3.Value;
            uint instrument_addr = (uint)P4.Value;

            string ext = U.GetFilenameExt(filename);

            if (ext == ".MID" || ext == ".MIDI")
            {
                if (SongUtil.UseGBAMusRiper())
                {
                    bool r = SongUtil.ExportMidiFileByGBAMusRiper(filename, (uint)this.Address.Value);
                    if (!r)
                    {//代用する
                        SongUtil.ExportMidiFile(filename, songname
                                                , Tracks, NumBlks, Priority, Reverb, instrument_addr);
                    }
                }
                else
                {
                    SongUtil.ExportMidiFile(filename, songname
                                            , Tracks, NumBlks, Priority, Reverb, instrument_addr);
                }
            }
            else if (ext == ".SF2")
            {
                SongUtil.ExportSoundFontByGBAMusRiper(filename, (uint)this.Address.Value);
            }
            else if (ext == ".INSTRUMENT")
            {
                //少し時間がかかるので、しばらくお待ちください表示.
                using (InputFormRef.AutoPleaseWait pleaseWait = new InputFormRef.AutoPleaseWait(this))
                {
                    SongUtil.ExportInstrument(filename, instrument_addr);
                }
            }
            else
            {
                SongUtil.ExportSFile(filename, songname
                                     , Tracks, NumBlks, Priority, Reverb, instrument_addr);
            }

            //エクスプローラで選択しよう
            U.SelectFileByExplorer(filename);
        }