Why hook Dll

[bar891]

Sorry for the newbie question..........
When reversing a program why would you modify a dll file over the main program file? Or is there times when you have to modify the dll file?

Many Thanks
:)

[rwid]

If some portion of program logic you seek to modify is contained within the Dll and not the Exe, well then you need to modify the Dll :p . Quite often in larger client/server-based games, the bulk of client-side code is contained not the Exe, but in a client Dll that the Exe loads at runtime. If you wanted to modify some aspect of the game's engine, you might find the applicable code lies in its client Dll.