using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Diagnostics;

using System.Reflection;

using System.Runtime.InteropServices;



namespace Keygen

{

	public partial class Form1 : Form

	{

		public Form1()

		{

			InitializeComponent();

		}



		private void button1_Click(object sender, EventArgs e)

		{

			//MessageBox.Show(Convert.GetTypeCode(textBox1.Text).ToString());

			textBox2.Text = Convert.ToInt32(textBox1.Text, 16).ToString();

		}



		private void button2_Click(object sender, EventArgs e)

		{

			// MessageBox.Show(DecimalToBase(Convert.ToInt32(textBox2.Text), 16,8));

			string code = GetCode();

			long num3 = 0L;

			

			for (int j = 0; j < code.Substring(6).Length; j++)

			{

				num3 += (long)code.Substring(6)[j];

			}

			

			MessageBox.Show(DecimalToBase((int)((num3 * 2457) % 2147483647),16,8));

		}





		private static string DecimalToBase(int iDec, int numbase, int intLength)

		{

			char[] chArray = new char[] { 'A', 'B', 'C', 'D', 'E', 'F' };

			string str = "";

			int[] numArray = new int[20];

			int num = 20;

			

			while (iDec > 0)

			{

				int num2 = iDec % numbase;

				numArray[--num] = num2;

				iDec /= numbase;

			}

			

			for (int i = 0; i < numArray.Length; i++)

			{

				if (((int)numArray.GetValue(i)) >= 10)

				{

					str = str + chArray[((int)numArray.GetValue(i)) % 10];

				}

				else

				{

					str = str + numArray.GetValue(i);

				}

			}

			

			str = str.TrimStart(new char[] { '0' });

			string str2 = "";

			

			for (int j = 1; j <= (intLength - str.Length); j++)

			{

				str2 = str2 + "0";

			}

			return (str2 + str);



		}



		public static string GetCode()

		{

			FileVersionInfo fileVersionInfo1 = FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location);

			int i1 = (((fileVersionInfo1.FileMajorPart * 100000) + (fileVersionInfo1.FileMinorPart * 1000)) + fileVersionInfo1.FileBuildPart);//get version info and format it

			i1 *= 2; //double our version number...

			string string1 = string.Format("{0:X6}", i1); //take version info (doubled) and get the HEX string of it

			string string2 = GetVolumeSerial(Assembly.GetExecutingAssembly().Location.Substring(0, 1)); //volume serial using drive letter in some weird fashion 

			return (string1 + string2); //concatenates version with serial

		}



		[DllImportAttribute("kernel32.dll", EntryPoint = "GetVolumeInformation", CharSet = CharSet.None, ExactSpelling = false, SetLastError = false, PreserveSig = true, CallingConvention = CallingConvention.Winapi, BestFitMapping = false, ThrowOnUnmappableChar = false)]

		[PreserveSigAttribute()]

		

		private static extern long GetVolumeInformation(string PathName, StringBuilder VolumeNameBuffer, uint VolumeNameSize, ref uint VolumeSerialNumber, ref uint MaximumComponentLength, ref uint FileSystemFlags, StringBuilder FileSystemNameBuffer, uint FileSystemNameSize);

		

		private static string GetVolumeSerial(string strDriveLetter)

		{

			string s = "";

			uint uInt32_1 = uint.MinValue;

			uint uInt32_2 = uint.MinValue;

			StringBuilder stringBuilder1 = new StringBuilder(256);

			uint uInt32_3 = uint.MinValue;

			StringBuilder stringBuilder2 = new StringBuilder(256);

			strDriveLetter = (strDriveLetter + ":\\"; //concatenate drive letter such as "C" with ":\"

			long int64_1 = GetVolumeInformation(strDriveLetter, stringBuilder1, ((uint)stringBuilder1.Capacity), ref uInt32_1, ref uInt32_2, ref uInt32_3, stringBuilder2, ((uint)stringBuilder2.Capacity));

			s = Convert.ToString(uInt32_1).Replace("-", ""; //remove our dashes from return (lpVolumeSerialNumber)

			return s; //send back lpVolumeSerialNumber without dashes

		}

	}

} 















public static void SetLicence (string strKey) {

	string str = "";

	string str2 = "";

	string str3 = "";

	string str4 = "";

	if ((strKey != "" && (strKey.Length == 35)) //length must be 35, or quit

	{

		StringBuilder builder = new StringBuilder();

		

		for (int i = 0; i < strKey.Length; i++) //loop through the 35 

		 {

			if ((strKey[I] > 'F') && (strKey[I] < '[')) // check if its between 70 and 91 (ascii codes for values), if so make it zero

			{											// this is F-Z basically

				builder.Append('0');

			}

			else  //if it's below 70 or above 90 keep it.

			{     // That makes it 0-9 and A-F as well as a-z if there is no toUpper command.

				builder.Append(strKey[I]);

			}

		}

		

		strKey = builder.ToString(); //Missing the code for the function, but make our array into 3 strings again?

		

		str = strKey.Substring(0, 8); // get the first 9 characters

		strKey = strKey.Replace(str + "-", ""; //remove a dash

		str2 = strKey.Substring(0, 8);// get the next 9 characters

		strKey = strKey.Replace(str2 + "-", "";//remove a dash

		str3 = strKey.Substring(0, 8);// get the last 9 characters

		strKey = strKey.Replace(str3 + "-", "";//remove a dash

		str4 = strKey; //str4 holds our whole serial now

		

		long num2 = 0L;

		

		num2 += Convert.ToInt32(str.Substring(0, 3), 16); //make 32 bit int (of the first 4 letters of str), add it to zero

		num2 += Convert.ToInt32(str2.Substring(0, 3), 16); //make 32 bit int(of the first 4 letters of str2), add it to the last one

		num2 += Convert.ToInt32(str3.Substring(0, 3), 16); //make 32 bit int(of the first 4 letters of str3), add it to the last one

		

		if (num2 == Convert.ToInt32(str4, 16)) //make the whole serial into a 32 bit int

		{

			FileVersionInfo versionInfo = FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location); //Returns name of application

			string str5 = Convert.ToInt32(str.Substring(0, 6), 16).ToString(); //convert first 7 chars of str to an int, then to a string

			

			if ((versionInfo.FileMajorPart.ToString("0" + versionInfo.FileMinorPart.ToString("00") == str5.Substring(0, 3)) //Returns version info

			{

				string code = GetCode(); //returns (version*2 in hex) + with volume serial (without dashes)

				long num3 = 0L; //new variable...

				

				for (int j = 0; j < code.Substring(6).Length; j++) //loop through the code from above.

				{

					num3 += (long) code.Substring(6)[j]; //sum up all the values of the code

				}

				if (Convert.ToInt32(str2, 16) == ((num3 * 999) % 0x7fffffffL)) //recall what str2was as a 32bit int, check if it == num3*999 modulus 2147483647

				{

					MessageBox.Show("Good Work!!!!"; 

				}

			}

		}

	}

	if (menmLicenseType == LicenseType.Demo)

	{

		MessageBox.Show("Try again!!!!";