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What is DLL File and How To Open It?

What iS the DLL File?

A DLL file stands for the Dynamic Link Library. It is a type of file that includes the instructions that other applications can call upon to do certain things. In this manner, several programs can share the programmed abilities in a single file and even do so simultaneously.

For example, many different applications may call upon the very useful DLL file to search the free space on the hard drive, locate the file in a specific directory, and print the test page to the default printer.

A DLL file includes the library of functions and other data that can be accessed by the windows application. When a program is launched, linked to the necessary DLL, files are generated. If a static link is generated, the DLL files will be in use as long as the application is active, whereas if a dynamic link Is generated, the DLL files will only be used when needed. Dynamic links help applications use resources like memory and hard drive space more efficiently. 

Steps to open DLL FILES

  1. Go to the Start Menu.
  2. Type the “Visual Studio Tool.”
  3. Go to the folder given above.
  4. Click on developer Command Prompt.
  5. After the command prompt loaded to the screen, type ILDASM.EXE hit the ENTER tab.
  6. ILDASM window will open. Drag the DLL file to the window from the folder or Tap the File button and then click on the New command. Now Add the required DLL file.
  7. After the above steps Manifest and the DLL file will appear. Double-tap on these files to see what it includes.

Methods To Open DLL Files

Method 1: By using DLL Files

  1. First, understand what a DLL file is.
  2. Know that the average user doesn’t need to open or interact with the DLL files.
  3. And then register a new DLL file.

Method2: By decompiling DLL Files

  1. Firstly, Download and then install a decompiler.
  2. Open your DLL file in the decompiler.
  3. Use the “Assembly Explorer” to search the nodes of the DLL file.
  4. Double-tap on the node to see the code for it.
  5. Get the clarification for different pieces of the code.
  6. Export code to Visual Basic.
  7. Edit code in Visual Studio.

Advantages Of DLL File

The following list will display some of the merits that are provided when a program uses a DLL:

  1. Uses fewer resources
  2. Promotes the modular architecture
  3. Eases deployment and installation

Steps to convert DLL file to ASP.NET    

This is the most feasible option to convert your .NET DLL file into an ASP.NET project. You can then download the trial version of the .NET Reflect 10.0.4 software tool online.


  1. Firstly, Download and then install the trial version of .NET Reflector on the machine.
  2. Install it and then open it on any Windows OS.
  3. You can find that the list of DLL files will then appear on the page’s extreme left side.
  4. When you hit on the DLL file, you can find the list of methods on the extreme right side of the page.
  5. And, we have an option to look out for each attribute. Click on the + Expand button on the DLL file.
  6. Find below the image for more details.


If you want to open your current DLL file, Tap the icon that is marked in the window. You will then find another pop-up window to fetch your respective file in a location.


You can find the “Search” icon under the Help menu to search your DLL from the list.


  1. For example, if you have another DLL file if your project has been converted as a DLL file.
  2. Drag and drop the DLL file on the .NET reflector.
  3. You can find the list of languages from the dropdown menu.
  4. IL
  5. C#
  6. Visual Basic
  7. MC++
  8. Select the technology you need to convert into and then select the framework next to the language.
  9. We also have an option to save it in the same reflector.


  1. Right-tap on the DLL file, which you need to convert.
  2. Hit the “Export to Source Code” option. You will find below the page on the window.
  3. Click on the “Start” button.
  4. Your source code will then be stored in the preferred location.

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