DLL files And Windows Operating System
DLL files are something that many people do not understand when it comes to the windows operating system.DLL files are basically the files, which create a collection of small programs.
These small programs come together and when a person uses an .exe file or an executable file. In other words, when you open a program and start to use it the DLL file allows the program to communicate with a specific device within the computer, an attached device or it may contain the code necessary to produce a particular result concerning program function.
For example, if you were to run a program, which was requesting space from the hard drive, the computer in order report to the executable program the free space would call upon a dynamic link library file available. Therefore, when you see in an installation that you have a certain amount of space free and the program needs a specific amount of that space. The program called on a DLL file in order to tell it how much space was available on the drive.
DLL files are known as shared files because all the programs of the computer rather than being used by only one particular program use them. They are built into the operating system in order to allow the executable files to be significantly smaller since they do not have to include code that would be inserted to request this type of information from the computer.
It also lowers the amount of RAM that is used by the program. If a particular part of the code is loaded into, the program you are working with then it is brought up and held in RAM in case it is needed. Dynamic link library files help to eliminate some of the pull on RAM but only being active when a particular device or function is activated within the program. For example, the DLL file necessary for printing is only called when the program user clicks or asks the computer to print something. Once the printing is done, it is removed from the RAM of the computer. By doing this, the systems resources necessary to do a variety of functions that are commonly used can be saved.
While this does make the operating system larger, it makes the executable programs significantly smaller and makes it so they have less of a draw on systems resources allowing multiple programs to be open simultaneously.