DLL files are so-called dynamic link library files, which are provided under Windows by the operating system or other programs.
They contain program parts, e.g. Functions or data that can be dynamically reloaded and used by programs. Many drivers also use these files.
Many DLL files are available system-wide and are used by numerous programs. This reduces memory usage as different programs can use the same file and functionality.
It is generally not recommended to delete or modify files with the extension dll, as this can endanger the function of programs or even Windows itself. Even duplicate DLL files should not be touched because different versions of the same file may exist. However, existing DLL files in the directory of a program can be deleted during an uninstall.
Information about the DLL file can be obtained via the context menu (right-click).
It can create and modify DLL files with development environments like Microsoft Visual Studio