What is the difference between a COM DLL and a VC++ MFC DLL?

when we will say a dll is COM dll and when we will say a dll is vc++-MFC dll ?

What开发者_如何转开发 is the difference between them ?

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A COM DLL exposes one or more COM objects. For more on COM DLLs please see http://msdn.microsoft.com/en-us/library/2wad1c0e(VS.80).aspx

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I believe your question is wrong . Actually MFC is one of the ways to create a com DLL along with ATL