C#打開光驅

[DllImport("winmm.dll")]
public static extern int mciSendString(string s1,string s2,int i1,int i2);
//關閉光驅
mciSendString ("set cdaudio door closed","",0,0);
//打開光驅
mciSendString ("set cdaudio door open","",0,0);