// BGMPlayer
        private void BGMPlayer_ControlGrid_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == BGMPlayer_ColumnSetting.Index)
            {
                var handleID = (SyncBGMPlayer.SoundHandleID)BGMPlayer_ControlGrid[BGMPlayer_ColumnContent.Index, e.RowIndex].Value;

                using (var dialog = new DialogConfigurationBGMPlayer(BGMHandles[handleID])) {
                    if (dialog.ShowDialog(this) == System.Windows.Forms.DialogResult.OK)
                    {
                        BGMHandles[handleID] = dialog.ResultHandle;
                    }
                }

                UpdateBGMPlayerUI();
            }
        }
        // BGMPlayer
        private void BGMPlayer_ControlGrid_CellContentClick( object sender, DataGridViewCellEventArgs e )
        {
            if ( e.ColumnIndex == BGMPlayer_ColumnSetting.Index ) {

                var handleID = (SyncBGMPlayer.SoundHandleID)BGMPlayer_ControlGrid[BGMPlayer_ColumnContent.Index, e.RowIndex].Value;

                using ( var dialog = new DialogConfigurationBGMPlayer( BGMHandles[handleID] ) ) {
                    if ( dialog.ShowDialog( this ) == System.Windows.Forms.DialogResult.OK ) {
                        BGMHandles[handleID] = dialog.ResultHandle;
                    }
                }

                UpdateBGMPlayerUI();
            }
        }