Open and Close CD drive in C#

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;

namespace OpenCloseCD
{

	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button openb;
		private System.Windows.Forms.Button closeb;

		private System.ComponentModel.Container components = null;

		public Form1()
		{InitializeComponent();}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.openb = new System.Windows.Forms.Button();
			this.closeb = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// openb
			// 
			this.openb.Location = new System.Drawing.Point(0, 8);
			this.openb.Name = "openb";
			this.openb.TabIndex = 0;
			this.openb.Text = "open";
			this.openb.Click += new System.EventHandler(this.openb_Click);
			// 
			// closeb
			// 
			this.closeb.Location = new System.Drawing.Point(96, 8);
			this.closeb.Name = "closeb";
			this.closeb.TabIndex = 1;
			this.closeb.Text = "close";
			this.closeb.Click += new System.EventHandler(this.closeb_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(176, 45);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.closeb,
																		  this.openb});
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
			this.Name = "Form1";
			this.Text = "CD CONTROL";
			this.ResumeLayout(false);

		}
		#endregion

		[STAThread]
		static void Main() 
		{Application.Run(new Form1());}

		/// <summary>
		/// Importing this god forbiden dll
		/// </summary>
		[DllImport("winmm.dll", EntryPoint="mciSendStringA")]
		public static extern void mciSendStringA(string lpstrCommand, string lpstrReturnString, long uReturnLength, long hwndCallback);
		
		//Why did i put this here?
		string rt = "";

		private void openb_Click(object sender, System.EventArgs e)
		{mciSendStringA("set CDAudio door open",rt,127,0);}//i remember, hehe.

		private void closeb_Click(object sender, System.EventArgs e)
		{mciSendStringA("set CDAudio door closed",rt,127,0);}// YODA FOR LIFE PEACE!
	}
}