Single Instance Application in C#

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

namespace TestApp
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class FrmMain : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label lblMsg;
		private System.Windows.Forms.Button btnClose;

		/// <summary>
		/// 
		/// </summary>
		public FrmMain()
		{
			// Required for Windows Form Designer support
			InitializeComponent();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		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.lblMsg = new System.Windows.Forms.Label();
			this.btnClose = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// lblMsg
			// 
			this.lblMsg.Location = new System.Drawing.Point(40, 40);
			this.lblMsg.Name = "lblMsg";
			this.lblMsg.Size = new System.Drawing.Size(208, 16);
			this.lblMsg.TabIndex = 2;
			this.lblMsg.Text = "Single Instance Application Demo";
			// 
			// btnClose
			// 
			this.btnClose.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
			this.btnClose.Location = new System.Drawing.Point(192, 104);
			this.btnClose.Name = "btnClose";
			this.btnClose.TabIndex = 1;
			this.btnClose.Text = "Close";
			this.btnClose.Click += new System.EventHandler(this.btnClose_Click);
			// 
			// FrmMain
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(280, 141);
			this.Controls.Add(this.btnClose);
			this.Controls.Add(this.lblMsg);
			this.Name = "FrmMain";
			this.Text = "SingleInstance";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;


		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			SingleInstance.SingleApplication.Run(new FrmMain());
			//Test code for console application
			//if(SingleInstance.SingleApplication.Run() == false)
			//{
			//	return;
			//}
			//Write your program logic here
			
		}

		private void btnClose_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}
	}
	
}