方法如下：首先需要在uses部分加入mmsystem，接着写入下列语句，其中e:\1.mid为播放的文件，NN为自定义名称标志
procedure TForm1.Button1Click(Sender: Tobject);
begin
//播放音乐
MCISendString('OPEN e:\1.MID TYPE SEQUENCER ALIAS NN', '', 0, 0);
MCISendString('PLAY NN FROM 0', '', 0, 0);
MCISendString('CLOSE ANIMATION', '', 0, 0);
end;

procedure TForm1.Button2Click(Sender: Tobject);
begin
//停止播放
MCISendString('OPEN e:\1.MID TYPE SEQUENCER ALIAS NN', '', 0, 0);
MCISendString('STOP NN', '', 0, 0);
MCISendString('CLOSE ANIMATION', '', 0, 0);
end;