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Concern about .DLLs

It is many years since I was seriously involved in PC programming so I may have forgotten, or things may have changed radically, BUT

my understanding of DLLs is that they are shar(ed)(eable) libraries of routines.

A given DLL will be loaded by the first app that requires it. Other apps that need it will check that it is there before loading another copy.

I am not sure what is responsible for unloading DLLs when they are no longer required but, logically, there must be a DLL manager in the OS.

Once loaded a DLL doesn't DO anything, ie doesn't consume processor unless a routine is being called. Even then I cannot see any difference between the routine being in the DLL or the main .EXE

Basically it sits there lurking in memory .....

So why the expressed concern about seeking and destroying all DLLs?

What am I misunderstanding / missing?

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Topic - Concern about .DLLs - clifff 13:06:15 08/22/06 (55)
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