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

namespace CrackMe2
{

	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button registerButton;
		private System.Windows.Forms.TextBox registerCode;
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.TextBox coolBox;
		private System.Windows.Forms.Button reverseButton;
		private System.Windows.Forms.GroupBox registeredGroup;


		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.registerButton = new System.Windows.Forms.Button();
			this.registerCode = new System.Windows.Forms.TextBox();
			this.registeredGroup = new System.Windows.Forms.GroupBox();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.coolBox = new System.Windows.Forms.TextBox();
			this.reverseButton = new System.Windows.Forms.Button();
			this.registeredGroup.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.SuspendLayout();
			// 
			// registerButton
			// 
			this.registerButton.Location = new System.Drawing.Point(176, 24);
			this.registerButton.Name = "registerButton";
			this.registerButton.TabIndex = 0;
			this.registerButton.Text = "Register";
			this.registerButton.Click += new System.EventHandler(this.registerButton_Click);
			// 
			// registerCode
			// 
			this.registerCode.Location = new System.Drawing.Point(8, 24);
			this.registerCode.Name = "registerCode";
			this.registerCode.Size = new System.Drawing.Size(152, 20);
			this.registerCode.TabIndex = 1;
			this.registerCode.Text = "";
			// 
			// registeredGroup
			// 
			this.registeredGroup.Controls.Add(this.reverseButton);
			this.registeredGroup.Controls.Add(this.coolBox);
			this.registeredGroup.Location = new System.Drawing.Point(8, 80);
			this.registeredGroup.Name = "registeredGroup";
			this.registeredGroup.Size = new System.Drawing.Size(312, 72);
			this.registeredGroup.TabIndex = 2;
			this.registeredGroup.TabStop = false;
			this.registeredGroup.Text = "Registered User Features";
			// 
			// groupBox2
			// 
			this.groupBox2.Controls.Add(this.registerCode);
			this.groupBox2.Controls.Add(this.registerButton);
			this.groupBox2.Location = new System.Drawing.Point(8, 8);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(312, 64);
			this.groupBox2.TabIndex = 3;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "Register to win cool prizes";
			// 
			// coolBox
			// 
			this.coolBox.Location = new System.Drawing.Point(8, 24);
			this.coolBox.Name = "coolBox";
			this.coolBox.ReadOnly = true;
			this.coolBox.Size = new System.Drawing.Size(152, 20);
			this.coolBox.TabIndex = 0;
			this.coolBox.Text = "";
			// 
			// reverseButton
			// 
			this.reverseButton.Location = new System.Drawing.Point(176, 24);
			this.reverseButton.Name = "reverseButton";
			this.reverseButton.Size = new System.Drawing.Size(88, 23);
			this.reverseButton.TabIndex = 1;
			this.reverseButton.Text = "Reverse Text";
			this.reverseButton.Click += new System.EventHandler(this.reverseButton_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(328, 166);
			this.Controls.Add(this.groupBox2);
			this.Controls.Add(this.registeredGroup);
			this.Name = "Form1";
			this.Text = "Crack Me 2";
			this.registeredGroup.ResumeLayout(false);
			this.groupBox2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion


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

		private void registerButton_Click(object sender, System.EventArgs e)
		{
			int serial;
			try 
			{
				serial = int.Parse(this.registerCode.Text);
			}
			catch 
			{
				MessageBox.Show(this, "Invalid serial.");
				return;
			}

			if ((serial & 1) == 1)
			{
				MessageBox.Show(this, "Invalid serial.");
			}
			else
			{
				this.coolBox.ReadOnly = false;
				MessageBox.Show(this, "Thank you for registering.");
			}
		}

		private void reverseButton_Click(object sender, System.EventArgs e)
		{
			char[] chars = this.coolBox.Text.ToCharArray();
			Array.Reverse(chars);
			this.coolBox.Text = new string(chars);
		}
	}
}