打开或关闭CD_ROM

实现效果：

　　

知识运用：

　　API函数 mciSendString　　//函数用来向媒体控制接口设备发送命令  声明如下

[DllImport("winmm.dll",EntryPoint="mciSendString")]
public static extern int mciSendString(string IpstrCommand,string IpstrReturnString,System.UInt16 uReturnLength,System.IntPtr HwndCallback);

 实现代码：

    [DllImport("winmm.dll",EntryPoint="mciSendString")]
    public static extern int mciSendString(string IpstrCommand,string IpstrReturnString,System.UInt16 uReturnLength,System.IntPtr HwndCallback);

    private void button1_Click(object sender, EventArgs e)
    {
        mciSendString("Set cdaudio door open wait","",0,this.Handle);         //打开CD_ROM
    }

    private void button2_Click(object sender, EventArgs e)
    {
        mciSendString("Set cdaudio door closed wait", "", 0, this.Handle);     //关闭CD_ROM
    }