Since the DLL are very basic and important for the functioning of the computer the user may not edit these files. Microsoft programs like Visual Studio allow the windows user to view and edit data in these .dll file extensions. This Disassembler allows for decompiling the .dll binary code into more easy-to-use formats. But unless you are a through expert you should not attempt editing dll files. A small mistake can stop your laptop functions altogether.
Not only windows but the linux and mac users may come across the File Extension DLL. Linux executes File Extension DLL as dynamic libraries, CorelDraw also uses these .dll file extensions and lauages like C++, Java and Visual Basic all use .dll file extensions.