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File type: Vitual CD File, FarStone Virtual Drive File, Value Change Dump File


What is a .VCD File

VCD files are disc image files of CD/DVDs and contain an exact copy of all the data on the physical disc. Along with the files and data on the disc these image files also contain the information such as the file system information and the boot record data of the disc.

These files can be created with the help of the Virtual CD software. These files are recognized by the Windows Operating System as actual discs. And can also read the data in spite of the fact that these are files that reside on the hard disk.

Also, allow for the usage of the CD/DVD drives on the computer without the need of the physical discs easily.

These files can be mounted over a virtual drive which is created by the Virtual CD software. And can be then browsed and run just like any other physical drive.

How to Open VCD Files

You can edit and convert it with the following programs.

Category: Data File
File format: Proprietary
Open with Windows:
  • Altera Quartus II,
  • EZB Systems UltraISO,
  • FarStone VirtualDrive,
  • Roxio Easy Media Creator,
  • H+H Software Virtual CD
Open with Linux:
  • GTKWave
VCD files are also used by the FarStone software application as copies of CDs or unprotected DVDs that have been saved over the file system or the hard disc as compressed image files or as virtual discs as explained above. These files can be executed instead of the original disc files whose copy they are and be mounted over any of the virtual drives on the system.
They are also dumped data that the logic simulation software application generates. And is generally in a standard ASCII text format.
These files contain special header data, value changes for specific variables as well as variable definitions.
The value changes are in the form of scalar of vector depending on the type of the variable.
Since these files are standard text files you can open or edit them using any standard text editor.

File type: Symbian Installation File


What is an SIS file?

An SIS file is a type of file about Symbian technology and Symbian applications. Although we now have advanced technology today, SIS remains the most common  installation archive of Symbian Operating Systems.

The SIS file extension is used for the installer archive of devices using the Symbian OS.
Examples of such are PDAs, Ericsson, Samsung, Siemens, Panasonic, LG, Sendo, Lenovo, Arima, FOMA, BenQ, Motorola, and Nokia phones.
This installer archive is created using the 'makesis' command line tool of Symbian. This tool is included in the CreateSIS application.
To installs the files using the SIS file extension, the user needs to transfer the files to the phone using the PC communication software of the phone. The SIS files will then be opened on the phone to execute the installer.

How to open SIS file extension

Category: Miscellaneous Files
File format: Propriety

To open this file format, you will need software that allows you to view it. Without suitable software on your device, you may see any of the following alerts.

  • How do you want to open this file?
  • Windows cannot file
  • An error alerts

To open this file, you will need to download a suitable program. Once you have downloaded and installed a suitable program, do the following.

  • Right-click the file
  • Click the “Open with” button and pick the application you have downloaded for the purpose 

Programs for opening or converting SIS files

Some suitable programs include 

#1 Symbian by Symbian

A Symbian by Symbian program is the main application for SIS file formats. If you work with SIS files regularly, you can download and install this program on your device for use at any time.

#2 Nokia Program

Nokia uses a Symbian Operating system, so opening an SIS file with a Nokia device shouldn’t be a problem.

#3 Sisma by Digital Confidence 

Sis is a database file for Sisma and this manager tool encrypts and stores data and passwords using the “256-bit AES Cipher technology. Sisma' association is Archive classified.

#4 SiSoftware Sandra

SiSoftware Sandra by SiSoftware is a reporting and diagnostic assistant that has 32-bit and 64-bit Windows analyzers for benchmarking, listing, and testing modules. With this program, not only can you open your SIS file, but you can also compare your device with other similar devices and technology.

A Symbian by Symbian program appears to be the best program for opening SIS files. This is simply because it is for such a purpose.  However, any of the other programs in this article work just as well.

If you work with SIS files regularly, endeavor to install any of them on your device, and you are good to go.

These SIS files contain install scripts and application files that define how the applications should be installed on Symbian-supported mobile phones.



In this article we will see:

  • What is and how to open DLL File extension
  • How to edit, view, convert, make, install and register it.
  • Programs, editors, viewers, readers and converters associated to this suffix format.


File Extension type: Dynamic link library


What is a .DLL file extension format

This format also know as Dynamic Link Library is a file shared between a number of software programs (and are similar to .EXE files). It is used in Microsoft Windows and OS/2 operating systems.

These files will contain compiled procedures, or drivers (for example for a printer) which a range of programs can then all access. You will often come across DLL files in the context of not having them, which is to say if you plug a new piece of hardware into your PC the computer might complain about missing the 123XYZ.DLL.

In practice this means that the system cant find the driver associated with this hardware. You will usually be able to download legitimate DLL files from a CD accompanying the hardware, or off the Internet from the hardware producers website. 

Additional comments: It is unlikely that you should ever have to open or edit a file extension dll (unless you are a specialist). Also note that these can be a source of infection and should be saved from the Internet or executed from an email, with care.

Appropriate program for file extension DLL

Specific software that can open DLL include: Generally there is no need to open it and it isn't particularly advisable to attempt to.

how to open a dll file for free

You can see here free software file viewers online and to download. Use one of the following free viewers.

In general, these files need the source code to decompile them in order to edit. 

Category: Compiled Files
File format: Open-Source
Open with Windows:
Open with Linux: 
Open with MAC:
  • N/A


If Windows is unable to open DLL files you may not have the appropriate program installed or may have a registry related error.


How to Open DLL Files with visual studio 

These are the required steps to open and edit:

  1. Go to the windows start menu
  2. There you must type Visual Studio Tool.
  3. A folder will appear. Go to it.
    1. For 2013 select "Developer Command Prompt"
    2. For 2010 select "Visual Studio Command Prompt ".
  4. The command prompt will appear.
  5. Type ildasm.exe
  6. Press ENTER.
  7. The window will open.
    1. Drag the file from the folder to the windows.
    2. Or Go to the file menu. Click on New and then add .dll
  8. Then, Mainfest and the .dll file will appear. Double click on it and see its contents.


How to decompile a .dll file

  1. First of all get the required software here 
  2. Open reflector.exe
  3. In the View section click on Add-Ins
  4. Click Add
  5. Search your file.
  6. Close the window
  7. GO to file->Open and select your .dll for decompile.
  8. Go to Tools->Generate Files and click on it
  9. Click on generate files and the process of decompile will start.



Why Can't i open it

The most important thing is to have a software, program or application that can manage these kind of files. A .dll file opener, fixer or editor.

If not you will fail opening it.

A viewer if you want to view it, a reader if you want to read it.


How to Edit 

To edit these kind of files you need a .dll editor.


How to read 

To read these files you need a dll reader program.


How to install 

You can install and register it following these steps:

  • Get or download the dynamic link library file.
  • Unzip and extract it.
  • Copy it in the system32 folder of windows. (the registry folder).
  • From the start menu Run program
  • Type regsvr32 and the name and path of your file (example regsvr32 C://windows/system32/example.dll
  • This will register your dll file



Running Regsvr32

Go to your start menu, and open the "Run" program. In the text area, type "regsvr32" then the path and name of the DLL file you just copied (for example, type "regsvr32 C://windows/system32/esck_001.dll"). This will open the registry registrar program for Windows, and it will automatically register the DLL that you just copied into the system folder.


How to make a dll file

Using visual studio

To create it you need to use visual studio 2019 from microsoft.

  1. Create a project
  2. Set languate C++
  3. Set platform = Windows
  4. The project type will be library
  5. Select in the project types Dynamic-link library
  6. Select next
  7. Configure your project

Using notepad

You can create a blank file and then add the .dll suffix.


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