Untitled

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net.Sockets;

namespace Portscanner
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox txtIP;
		private System.Windows.Forms.NumericUpDown numStart;
		private System.Windows.Forms.NumericUpDown numEnd;
		private System.Windows.Forms.RichTextBox txtLog;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <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.txtIP = new System.Windows.Forms.TextBox();
			this.label1 = new System.Windows.Forms.Label();
			this.numStart = new System.Windows.Forms.NumericUpDown();
			this.numEnd = new System.Windows.Forms.NumericUpDown();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.button1 = new System.Windows.Forms.Button();
			this.txtLog = new System.Windows.Forms.RichTextBox();
			((System.ComponentModel.ISupportInitialize)(this.numStart)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.numEnd)).BeginInit();
			this.SuspendLayout();
			// 
			// txtIP
			// 
			this.txtIP.Location = new System.Drawing.Point(72, 16);
			this.txtIP.Name = "txtIP";
			this.txtIP.Size = new System.Drawing.Size(136, 20);
			this.txtIP.TabIndex = 0;
			this.txtIP.Text = "";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(64, 24);
			this.label1.TabIndex = 1;
			this.label1.Text = "Ip nummer:";
			// 
			// numStart
			// 
			this.numStart.Location = new System.Drawing.Point(72, 64);
			this.numStart.Name = "numStart";
			this.numStart.Size = new System.Drawing.Size(48, 20);
			this.numStart.TabIndex = 2;
			// 
			// numEnd
			// 
			this.numEnd.Location = new System.Drawing.Point(192, 64);
			this.numEnd.Name = "numEnd";
			this.numEnd.Size = new System.Drawing.Size(48, 20);
			this.numEnd.TabIndex = 3;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(0, 64);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(64, 24);
			this.label2.TabIndex = 4;
			this.label2.Text = "Start port:";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(128, 64);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(56, 24);
			this.label3.TabIndex = 5;
			this.label3.Text = "Slut port:";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(8, 104);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(96, 32);
			this.button1.TabIndex = 6;
			this.button1.Text = "Starta";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// txtLog
			// 
			this.txtLog.Location = new System.Drawing.Point(256, 8);
			this.txtLog.Name = "txtLog";
			this.txtLog.Size = new System.Drawing.Size(240, 224);
			this.txtLog.TabIndex = 7;
			this.txtLog.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(512, 242);
			this.Controls.Add(this.txtLog);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.numEnd);
			this.Controls.Add(this.numStart);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.txtIP);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);
			((System.ComponentModel.ISupportInitialize)(this.numStart)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.numEnd)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{

		
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			// Store values from the NumericUpDown to variables
			
			int StartPort = Convert.ToInt32(numStart.Value);

			int EndPort = Convert.ToInt32(numEnd.Value);


			// Let the user know the application is busy

			Cursor.Current = Cursors.WaitCursor;

			// Loop through the ports between start port and end port

			for (int CurrPort = StartPort; CurrPort <= EndPort; CurrPort++)

			{

				TcpClient TcpScan = new TcpClient();

				try

				{

					// Try to connect

					TcpScan.Connect(txtIP.Text, CurrPort);

					// If there's no exception, we can say the port is open

					txtLog.AppendText("Port " + CurrPort + " open" + "\n");

				}

				catch

				{

					// An exception occured, thus the port is probably closed

					txtLog.AppendText("Port " + CurrPort + " closed" + "\n");

				}

		

			}

			// Set the cursor back to normal

			Cursor.Current = Cursors.Arrow;
		}
	}
}