A Dynamic Link Library is what is known as a DLL. Inside this library are codes and data that can be simultaneously used by two or more programs. Only a small amount of your computers memory will be used up when the same functions in the library are simultaneously used by several programs. The reason for this is that the usage of a DLL will minimize the duplicity of codes once they are loaded in the memory. The programs and applications of your computer will therefore load with no trouble and the operation will be much faster.