Imports System.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Drawing.Drawing2D
Class Captcha
Inherits PictureBox
Public randomstr As String
#Region "Properties"
Private _textcolor As Color = Color.Black
Public Property TextColor() As Color
Get
Return _textcolor
End Get
Set(ByVal value As Color)
_textcolor = value
Invalidate()
End Set
End Property
Private _font As New Font("Segoe UI", 20)
Public Overrides Property Font() As Font
Get
Return _font
End Get
Set(ByVal value As Font)
_font = value
Invalidate()
End Set
End Property
Private _texttouse As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmopqrstuvwxyz1234567890"
Public Property RandomCharacters() As String
Get
Return _texttouse
End Get
Set(ByVal value As String)
_texttouse = value
Invalidate()
End Set
End Property
Private _captchalength As Integer = 8
Public Property CaptchaTextLength() As Integer
Get
Return _captchalength
End Get
Set(ByVal value As Integer)
_captchalength = value
Invalidate()
End Set
End Property
Private _numberoflines As Integer = 50
Public Property NumberOfLines() As Integer
Get
Return _numberoflines
End Get
Set(ByVal value As Integer)
_numberoflines = value
Invalidate()
End Set
End Property
#End Region
#Region "Events"
Public Sub New()
SetStyle(ControlStyles.AllPaintingInWmPaint, True)
SetStyle(ControlStyles.ResizeRedraw, True)
SetStyle(ControlStyles.UserPaint, True)
SetStyle(ControlStyles.OptimizedDoubleBuffer, True)
SetStyle(ControlStyles.SupportsTransparentBackColor, True)
End Sub
Protected Overrides Sub CreateHandle()
MyBase.CreateHandle()
Me.Size = New Size(241, 69)
Me.BorderStyle = BorderStyle.FixedSingle
End Sub
Public CaptchaText As String = String.Empty
Private rnd As New Random()
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
Dim B As New Bitmap(Width, Height)
Dim G As Graphics = Graphics.FromImage(B)
Dim BoxSize As New Rectangle(0, 0, Me.Width, Me.Height)
Dim txtcolor As Brush = New SolidBrush(Color.FromArgb(rnd.[Next](160, 255), _textcolor))
G.SmoothingMode = SmoothingMode.HighQuality
G.Clear(BackColor)
For I As Integer = 0 To _numberoflines - 1
G.DrawLine(New Pen(Color.FromArgb(rnd.[Next](128, 255), CreateRandomColor())), rnd.[Next](0, BoxSize.Width), rnd.[Next](0, BoxSize.Height), rnd.[Next](BoxSize.Width), rnd.[Next](BoxSize.Height))
Next
Dim SFormat As New StringFormat()
SFormat.Alignment = StringAlignment.Center
SFormat.LineAlignment = StringAlignment.Center
G.RotateTransform(rnd.[Next](-7, 7), MatrixOrder.Append)
randomstr = CreateRandomString()
G.DrawString(randomstr, Font, txtcolor, BoxSize, SFormat)
CaptchaText = randomstr
e.Graphics.DrawImage(B, 0, 0)
G.Dispose()
B.Dispose()
End Sub
#End Region
#Region "Create Randoms"
Private Function CreateRandomColor() As Color
Return Color.FromArgb(100, rnd.[Next](255), rnd.[Next](255), rnd.[Next](255))
End Function
Private Function CreateRandomString() As String
Dim buffer As Char() = New Char(_captchalength - 1) {}
For i As Integer = 0 To _captchalength - 1
If _texttouse = String.Empty Then
Dim newtext As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmopqrstuvwxyz1234567890"
buffer(i) = newtext(rnd.[Next](newtext.Length))
Else
buffer(i) = _texttouse(rnd.[Next](_texttouse.Length))
End If
Next
Return New String(buffer)
End Function
#End Region
End Classimport java.io.*;
public class Create_txt
{
public static void main(String args[])
{
FileOutputStream Create;
PrintStream Write;
try
{
Create = new FileOutputStream("Text.txt");
Write = new PrintStream( Create );
Write.println ("Ultimate programming tutorials");
Write.close();
}
catch (Exception e)
{
System.err.println ("Cannot write txt file");
}
}
}
it is a paper and pencil guessing game for two or more players. One player thinks of a word, phrase or sentence and the other tries to guess it by suggesting letters or numbers.Wikipedia
#includeThe includes are the namespaces in c++ , the code system("color 0a"); is the green color text of our Matrix effect (color oa is the system name for green) , srand(time(0)); is the random speed , for (int x = 0; x < 38; x++) draws the rows of characters , random_char = ((rand() % 127) + 50); checking = true; while (checking) generates the first character ,#include #include #include using namespace MatrixC; int main() { system("color 0a"); srand(time(0)); char random_char = ((rand() % 127)); bool going = true, checking = true; while (going = true) { for (int x = 0; x < 38; x++) { random_char = ((rand() % 127) + 50); checking = true; while (checking) { if ( (random_char == 32) || (random_char == 39) || (random_char == 46) || (random_char == 44) || (random_char == 34) || (random_char == 45) || (random_char == 58) || (random_char == 59) || (random_char == 94) || (random_char == 95) || (random_char == 96) || (random_char == 126) ) random_char = ((rand() % 127) + 50); else break; } cout << random_char << " "; } cout << endl; Sleep(20); } cin.get(); return 0; }
The Advanced Encryption Standard (AES) is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001.Based on the Rijndael cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen, who submitted a proposal which was evaluated by the NIST during the AES selection process.-Wikipediaok now you know AES lets try it in visual c# . create a console application and name it :) now here is my codes
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;
//Author : Mohamed Shimran
//Blog : http://www.ultimateprogrammingtutorials.blogspot.com
namespace AES
{
class Program
{
static void Main(string[] args)
{
UTF8Encoding UTF8 = new UTF8Encoding();
Console.WriteLine("Shims Encryption UPT");
string text = "Ultimate programming tutorials";
byte[] txt = UTF8.GetBytes(text);
Console.WriteLine("Text: " + text);
AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
byte[] key = aes.Key;
byte[] iv = aes.IV;
byte[] n;
ICryptoTransform ict = aes.CreateEncryptor(key, iv);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, ict, CryptoStreamMode.Write);
StreamWriter sw = new StreamWriter(cs);
sw.Write(text);
sw.Close();
n = ms.ToArray();
Console.WriteLine("Encrypted : " + Convert.ToBase64String(n));
ICryptoTransform icrt = aes.CreateDecryptor(key, iv);
MemoryStream mms = new MemoryStream(n);
CryptoStream cts = new CryptoStream(mms, icrt, CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cts);
Console.WriteLine("Decrypted : " + sr.ReadToEnd());
sr.Close();
aes.Clear();
Array.Clear(key, 0, key.Length);
Array.Clear(iv, 0, iv.Length);
Console.Read();
}
}
}
A screen magnifier is software that interfaces with a computer's graphical output to present enlarged screen content. It is a type of assistive technology suitable for visually impaired people with some functional vision; visually impaired people with little or no functional vision usually use a screen reader. WikipediaActually we are going to make a screen magnifier not just a magnifier the word magnifier refers to a scientific instrument.
