A DLL is a collection of small programs, which can be called when needed by a larger program that is running in the computer. The small program that lets the larger communicate with a specific device such as printer or scanner is often packged as a a DLL program.
The advantages of DLL:
DLL's don't get loaded in RAM together with the program , so space is saved in RAM(Random Access Memory).
When and if a DLL file is needed, then it is loaded and run. For example, as long as a user of Microsoft Word is editing a document, the printer DLL file does not need to be loaded into RAM. If the user decides to print the document, then the Word application causes the printer DLL file to be loaded and run.
The advantages of DLL:
DLL's don't get loaded in RAM together with the program , so space is saved in RAM(Random Access Memory).
When and if a DLL file is needed, then it is loaded and run. For example, as long as a user of Microsoft Word is editing a document, the printer DLL file does not need to be loaded into RAM. If the user decides to print the document, then the Word application causes the printer DLL file to be loaded and run.
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