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Image processing – Edge Detection filters with c++ and GDI+

2008-11-10T15:23:00.000-07:00

This article explains 2 different ways to do edge detection: first method is based on: Sobel , Prewitt and Kirsh and the second one is based on the difference between pairs of pixel around the current pixel.

Download a remote file from a valid URL in C++

2008-11-10T15:22:00.000-07:00

You can use this code to download a remote file from a valid URL using API functions or MFC classes

Image Processing - Convolution Filters with c++ and GDI+

2008-11-10T15:21:00.001-07:00

A brief description of several useful convolution filters which allows you to apply various effects on photos for certain features.

Using Ajax with Javascript and PHP

2008-11-10T15:20:00.001-07:00

In this article we'll discuss the basic principles of remote scripting using Ajax, (asynchronous JavaScript and XML) to allow web pages to be updated without the user having to wait for a page refresh.

How to Create CAPTCHA Protection using PHP

2008-11-10T15:17:00.002-07:00

Describe how to create CAPTCHA Protection using PHP. It is used to prevent spam abuse on the websites.

Transparent PNGs in Internet Explorer 6

2008-11-10T15:16:00.000-07:00

In IE 6 if your webpage contains an image that has a transparent background in Portable Network Graphics (PNG) format, the image background may appear to be gray rather than transparent.This article describe how to display transparent PNGs in Internet Explorer 6.

Capturing Video on J2ME devices

2008-10-12T10:32:00.002-06:00

The Mobile Media API extends the functionality of the J2ME platform by providing audio, video, and other time-based multimedia support to resource-constrained devices. As a simple and lightweight optional package, it gives Java developers access to native multimedia services available on a given device.In this article you can find a very useful application for capturing video on J2ME devices.Read

Create shortcuts with the IShellLink Interface in Visual C++

2008-10-11T09:26:00.002-06:00

The IShellLink interface allows Shell links to be created, modified, and resolved but it has no concept of how to read or write itself to a file on disk.In order to provide file access, the IShellLink interface required to support the IPersistFile , an interface that provides methods for reading and writing to and from disk.Read complete article here

Monitoring File System using FileSystemWatcher Class

2008-10-11T09:24:00.002-06:00

The FileSystemWatcher class is used to watch for changes in a specified directory. You can watch for changes in files and subdirectories of the specified directory. Also you can create a component to watch files on a local computer, a network drive, or a remote computer. The FileSystemWatcher is designed to watch for changes within the directory, not to changes to the directory's attributes

Yahoo Mail Shortcut using JScript

2008-10-09T14:59:00.001-06:00

This article shows how you can make a little script using JScript that automatically login to your Yahoo Mail account.The operating principle is very simple: Navigate to mail.yahoo.comWait for the browser until the page is completely loadingSearch for username, password fields and submit button.Username and password fields value are set with your account data. After that send a click message to

Check if a specific TCP or UDP port is open

2008-10-08T14:29:00.003-06:00

This article will show you how to scan in c++ a TCP or UDP port to see if it’s open. The TCP (Transmission Control Protocol ) is intended to provide a reliable process-to-process communication service in a multinetwork environment. The TCP is intended to be a host-to-host protocol in common use in multiple networks. User Datagram Protocol (UDP) is one of the core protocols of the Internet

Internet Explorer Key Logger using Browser Helper Objects

2008-10-07T15:29:00.001-06:00

This article will show you how to create a key logger for Internet Explorer.The application will send to a specified server all the URLs accessed by the browser and all the information sent via POST.The application is composed from two modules. One written in PHP which will be installed on the server where we want to send the desired information, and other written in C++ which will send data from

Accessing a MySQL Database from C++

2008-10-05T12:11:00.001-06:00

MySQL provide C libraries that enable the creation of MySQL database applications.In this article I will present a simple class that encapsulates the functionality of MySQL database access commands.It establishes database connections, executes queries, storing the result and provides other functions to traverse the result set an retrieve the data returned by the database server.Read the entire

Remote control PC's across a LAN

2008-10-05T12:09:00.001-06:00

This is a basic remote control application for Windows formed from two modules. One that runs as server and listen to ports 5001 and 5002 (5001 used for image transfer and 5002 for mouse commands, keyboard is not implemented), and the second one which runs as client.The application was written in c++ and compiled using Microsoft Visual Studio. NET 2003 (7.1).It can still be compiled using

Building A SOAP Client With Visual C++

2008-10-05T12:07:00.002-06:00

SOAP is an acronym that comes from "Simple Object Access Protocol". It's used for exchanging XML-based messages over computer networks, normally using HTTP/HTTPS. SOAP forms the foundation layer of the web services protocol stack providing a basic messaging framework upon which abstract layers can be built.If you want to build a SOAP client you can choose to use different open source solutions

An introduction to bitwise operators

2008-10-05T12:00:00.002-06:00

This article gives a brief overview of C style bitwise operators.Because a lot of people seem to have problems with bitwise operators I had decide to write this short tutorial on how to use them.There are six bitwise operators: & AND| OR^ XOR~ NOT>> Right Shift<<>You can find a detailed presentation of each operator here

Exporting a digital certificate to a PFX file

2008-10-05T11:57:00.001-06:00

A certificate is a set of data that identifies an entity. A trusted organization assigns a certificate to an individual or an entity that associates a public key with the individual.You can export your PFX files programmatically using Microsoft Cryptography API which is an application programming interface included with Microsoft Windows operating systems that provides services to enable

How to use Regular Expressions in Visual C++

2008-10-05T11:54:00.002-06:00

Regular expressions provide a concise and flexible means for identifying strings of text of interest, such as particular characters, words, or patterns of characters. Regular expressions are written in a formal language that can be interpreted by a regular expression processor, a program that either serves as a parser generator or examines text and identifies parts that match the provided

Limit applications to one instance in Visual C++

2008-10-05T11:49:00.002-06:00

Sometimes you need to limit your application to a single instance. The most common way is creating a named mutex using CreateMutex, and checking to see if that mutex already existed or not. If that mutex already exists, it means that another instance application reside in your computer memory so you can kill your current instance.Click here for this article