17.2. Overview
Figure 17.1 shows the difference between a normal executable and an executable that uses dynamic link libraries.
Figure 17.1. A normal executable compared to an executable that uses DLLs. The normal application contains all object code in its EXE. The DLL application links to the DLLs at run-time
Any application that you write in Windows actually uses DLLs without your really being aware of it. For example, a normal MFC program of any size links to, among other things, KERNEL32.DLL, USER32.DLL, ADVAPI32.DLL, COMDLG32.DLL, GDI32.DLL, WINSPOOL.DLL, OLE32.DLL, SHELL32.DLL, and so on. As you can see, Windows uses DLLs quite extensively. ...
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