A Dll file does not work by itself. It is a library file that contains functions or instructions for other programs to use and work. Actual content in a Dll file is not in the code we can understand because all is in machine code.

To read these machine code functions we need to decompile every dll file ,so that machine code can be converted into the High Level languages like C,C++,VB etc. Decompiling (Reverse compiling) is not easy , as we first have to find out that in Which High Level Language any specific .dll file was written.

Reverse engineering for source code of a software is a legal area.  We may also get encoded piece of high level language after all the hard work. Encoding is the way of securing the explicit source code from reverse engineers.

Opening a .Dll file directly with any text editor or any other viewer is not the right option. Some software will reject a file with a warning of  “Unsupported File Type” and some will show you the ugly machine code.

As result of complexities said above , we have many utility tools to deal with .Dll Files.  From Microsoft , DUPS (DLL Universal Problem Solver) tool is used to audit, compare, document, and display DLL information. The following list describes the utilities that make up the DUPS tool:

• Dlister.exe
  This utility enumerates all the DLLs on the computer and logs the information to a text file or to a database file.
• Dcomp.exe
  This utility compares the DLLs that are listed in two text files and produces a third text file that contains the differences.
• Dtxt2DB.exe
  This utility loads the text files that are created by using the Dlister.exe utility and the Dcomp.exe utility into the dllHell database.
• DlgDtxt2DB.exe
  This utility provides a graphical user interface (GUI) version of the Dtxt2DB.exe utility

For more information about DUPS tool , you can visit the link provided below this article.

There are few more third party (Other than Microsoft) utilities tool for .Dll files. All have different use or purpose as a dll file utility tool. Let see some of them -

• DLL Export Viewer v1.45 -  This utility displays the list of all exported functions and their virtual memory addresses for the specified DLL files. You can easily copy the memory address of the desired function, paste it into your debugger, and set a breakpoint for this memory address. When this function is called, the debugger will stop in the beginning of this function

• InjectedDLL v1.00 – InjectedDLL is a small utility that displays the list of DLLs that are automatically injected on every process in your system.

• ResourcesExtract v1.17 – ResourcesExtract is a small utility that scans dll/ocx/exe files and extract all resources (bitmaps, icons, cursors, AVI movies, HTML files, and more…) stored in them into the folder that you specify. You can use ResourcesExtract in user interface mode, or alternatively, you can run ResourcesExtract in command-line mode without displaying any user interface.

• IconsExtract v1.47 – Extract icons and cursors from EXE, DLL, CPL, and OCX files and save them as ICO or CUR files.

• Resource Tuner – Resource Tuner lets you open Windows executable files such as .EXE, .DLL, Device Drivers (.SYS), OCX Controls, and several others. Once inside, you can change the look of the icons, cursors, dialogs, buttons, sounds, animations and other elements of the Windows user interface by editing and replacing resources in the executable files

• ExeInfo v1.01 – The ExeInfo utility shows general information about executable files (*.exe), dynamic-link libraries (*.dll), ocx files, and drivers files.

Most of the tools mentioned above are Free to download and use. But i will like to conclude with a word of caution that do not download such a utility tools from forums or communities sites. Almost every tool is free so download it directly from the creator’s site. I hope you will find this article helpful.

Yes, I know. Sometimes when you download a very important form related to your career,job or office and you need to fill it and send it quickly, you may feel helpless because form is in PDF and you do not know – “How to edit PDF files ?”

Searching online about editing PDF files will lead you to many Paid software or products which is not the way  you or most people like. Some free online tools are not the right option for your important files, forms and larger files.

But now you do not need to bother about it because we have very easy, permanent and free method to edit/create PDF files thanks to Free Open Office Suite.

Here are the quick steps for editing a PDF file in Open Office:

• You have to have Open Office 3.0 or later installed on your system. As said earlier, it is FREE to download and use. To download Open Office, visit download.openoffice.org

• Now to import PDF file in OpenOffice, we have to install a small Open Office PDFimport Extension. It is also freely available on OpenOffice.org.  Here is the Direct link to download page – Open Office PDFimport

• Download the extension. Open your Open Office Draw program. Go to the Tools menu and then select “Extension Manager”. Click on the “Add” button and then navigate to the folder where the pdf import extension is.

• Now in Open Office Draw, Use File -> Open and select the pdf file you want to edit. Open it

• Here we go, now you can edit any pdf file with OpenOffice.

File sharing is the practice of distributing or providing access to digitally stored information, such as computer programs, multi-media ( video, audio), documents and electronic books. It may be implemented through a variety of storage, transmission, and distribution models and common methods of file sharing incorporate manual sharing using removable media, centralized computer file server installations on WWW(world wide web) based hyperlinked documents, computer networks, and the use of distributed peer-to-peer networking.

Easy File Sharing Web Server is a file sharing software that allows visitors to upload/download files very easily through a Web Browser (IE, Mozilla, Netscape etc.). It can help you share files with your users, customers and partners. They can search for and download files from your computer or upload files from theirs. The files on your PC can be accessible from anywhere without using of any special software . Easy File Sharing Web Server also provides a Bulletin Board System (Forum). It makes it easy for remote users to post messages and files to the forum. The Secure Edition adds support for SSL encryption that helps protect businesses against site spoofing and data corruption.

You can create a virtual folder from your hard disk ,visitors may upload/download files to/from it. Easy File Sharing Web Server is much easier to use than a typical FTP (file transfer protocol) server. It is also a web based file management solution that allows you to manage files on your web server just with a web browser instead of a FTP client, it also provides extended features which are impossible with FTP such as zipping and unzipping files.

Hackers are always try to get into computers of other persons. It can be something as simple as phising confidential information ( like bank account numbers or credit card ) to complex hacking routines that use your computer as a repository for illegal content (like movies or music with copyright).

Unfortunately there is no magic or any software to prevent hackers directly   and it will never exist in future. It doesn’t matter how much money or resources we invest to design the perfect system, somebody will always try to find the way to crack it. Even the biggest government agencies like NASA, CIA and NSA have been victims of hackers but they can’t do anything and the same thing happens in the private sector with companies like Citigroup or Wal-Mart and many more.

The first thing we have to take care that in computer hacking prevention is to assure yourself that all your software is up to date, especially our operating system and our web browser.  Because they are the two things that hackers will try to attack first if they want to get into your computer.

The second thing that we need to do is to install a firewall. Internet firewall hacker protection has become so necessary that Microsoft now ships it for free as part of their Windows XP operating system to protect our pc.

At the end, there should be the anti-spyware program. As if viruses were not enough, companies from around the world decided to create programs that could pick up data from your computer in order to acquire information for their databases. It may not be as dangerous as a virus, but it is an intrusion to your privacy. Wipe them out with this piece of software.

Keyboard Activity Monitoring Tool is a hidden inspection utility that keeps track of all activities performed on your system in your absence. keylogger will let you monitor whatever work is done by the people in the background.

Key logger will records every keystroke make by the user in every application and save it to a text document/files. All major anti-keylogger or spy tools can’t be major by any anti-virus softwares. It is easy to use key catcher software helps you to watch your co-workers  are doing online, students are doing at lab,school and at home. So by using this software you can easily customize keyboard activity in the manner you want.

Features of keylogger software:

• Very easy to use
• Can work in invisible/hidden mode
• Invisible in window explorer
• Small size and low system requirements
• Capable of removing programme shortcuts from start menu.
• Capable of removing itself from uninstall list.

Before you think to create a backup, you have to arrange your files in an order. It doesn’t mean that you have to arrange each and every file in a different folder. You only make sure that all the essential data files are stored in one easy to find location.

People who use their computer occasionally (7 hours/week or less) should be backing up their data on at least a weekly basis. If you use your computer more frequently, however (more than 12 hours/week), doing it daily is probably a great idea.

How to Backup:

You can set up automatic backups or manually back up your files at any time whenever you want,for that you have to pass through the following steps:

1. Clicking the start button

2.Clicking the control panel

3.Clicking System and Maintenance, and then clicking Backup and Restore.

Notes:

• Never back up your files to the same hard disk that Windows is installed on.
• Always try to store media which is  used for backups (external hard disks, DVDs, or CDs) in a secure place to prevent unauthorized people from having access to your files.

A dynamic link library (DLL) is a collection of small programs, which can be called upon when needed by the executable program (EXE) that is running.

The Compiled library files are  containing a set of  drivers and/or procedures that are referenced and executed by a program that allows multiple programs to access shared system functions through common libraries and It may be dynamically linked into a program at runtime.

Most of the  DLL files are provided with the Windows operating system, and others are included by Windows programs and they allow various program functions, such as communication with external devices and hard disk input and output and it can be referenced by Mac cross-platform applications.

An example : If the program (exe) needs to get the free space of your hard drive. It can call the DLL file that contains the function with parameters and a call function. The DLL will then tell the executable the free space. This allows the executable to be smaller in size and  haven’t to write the function that has already exists.

COMDLG32.DLL

It controls the dialog boxes.

GDI32.DLL

It contains numerous functions for displaying text, managing fonts and drawing graphics.

KERNEL32.DLL

It contains hundreds of functions for the memory management and various processes.

USER32.DLL

It contains numerous user interface functions. It involved in the creation of program windows and their interactions with each other.

NOTE: The contents of a DLL file may cause errors within the program that references the file when deleting or modifying; for this reason, DLL files generally should not be opened or edited.  See here – “How to Open a dll file ?“

A hidden directory or hidden file on a computer is a directory (folder) or file which a user can’t see by default. The Hidden directories/files are  most often serve to hide important operating system-related files and user preferences.

Showing hidden files  is not a big task—for example, If we want  to delete everything from a floppy disk and the disk properties still indicate 100K of disk space which is  used by hidden files.

To see hidden files:

Note :To access Windows Explorer, click Start, point to All Programs, and then click Windows Explorer.

This is one of the most commonly asked questions on many video and audio forums. Many want to know how to combine video and audio footage, or combine multiple video files together.

The great thing is that the process of doing this is not that hard. You just have to have the right software and a little bit of time. I am going to go over four of the most popular software titles for combining multiple media files below.

Mediajoin

Are you looking for a solution that allows you to combine your video and audio files together quickly and easily? Mediajoin is a great piece of software that allows you to combine MP3, OGG, WAV, and WMA audio files with AVI, MPEG and WMV video files. This software is free, but unavailable for download from the developers website. If you look around on other download sites, though, you should be able to find it.

Combimovie

Are you just looking to combine a few video media files for a one-time project? Are you looking for something free? If so, then Combimovie is for you. Combimovie allows you to combine multiple mpg/mpeg videos into one big file. This is freeware, so you will not have to pay any money to do this.

Windows Movie Maker

This is a basic program that comes with Windows XP. It allows you to combine WMV files and make them into one large file. It is pretty basic and isn’t very effective in working with other file formats, but it is free with your operating system and can be of some use.

Easy Video Joiner

Easy Video Joiner is the only one of these programs you will have to pay for. It is for good reason, though. Easy video joiner has support for many different file formats the others do now offer. This is a good program if you are combining videos on a daily basis, but if you are just an occasional user, this is overkill. If you want to combine media files together, all you need is a simple piece of software nothing else.

All of the above applications make it easy for you to combine different media file types.

Not every movie file on the Internet has the same file type. Windows Media files are different than QuickTime movies, which are not the same as Real media files. Each format has specific uses and run through specific programs. Here are some of the most common movie file types you will find on the Internet.

Windows Media File

Windows Media video files (or .wmv) are one of the most popular movie file types on the Internet. They are played in the standard Windows Media Player that comes with all Windows computers.

QuickTime Movie

The QuickTime movie format (or .mov) is Apples equivalent to Windows Media Video files. It is very popular because this proprietary video format can be played on both Mac and Windows computers. .mov files are played by apples QuickTime player.

Real Media file

Real media files (or .rm) are files that can be completely downloaded before playing, or can be streamed directly from the Internet. These files can contain audio data, video data, or both. Real media files are
played on the Realnetwork’s Real Player.

MPEG

Moving Pictures Expert Group (or .mpg) files contain compressed audio and video data. MPEG files can be played on either QuickTime or Windows Media Player.

DIVX

DIVx files are high quality compressed movie files. It allows videos to be a lot smaller data-wise while still delivering crystal clear video. There are quite a few different programs that will play these files, but
DIVx does offer a downloadable program that will play these files.

SWF

SWF files are animation files that are created by Adobe Flash. They can contain audio and visual imagery, but instead of movies, the visual components are usually vector images. SWF files are vey popular in web
design and advertising applications. Any web browser with the downloadable flash player plugin can view these files.

What if you are trying to play a video file that is not listed above?

If you have a video file that you would like to play, but is not in one of the above formats, you are going to have to do some extra research to find the correct player or codec. If you type the file extension into
almost any search engine, many results will pop up and give you information on the necessary software needed to execute your given file type.