windows - regular dll vs extension dll -


i have dll (a.dll) uses atl stuff, , can't have mfc in it. there stuff needs mfc though, made mfc regular dll, called b.dll , gets automatically loaded @ runtime a.dll (via import library).

the part of b.dll needs class (foo) defined in b.dll, , class has stuff in uses mfc. allowed create foo object in a.dll? b need extension dll instead?

the regular dll page says:

all memory allocations within regular dll should stay within dll; dll should not pass or receive calling executable of following:

  • pointers mfc objects

  • pointers memory allocated mfc

but extension dll page says

the client executable must mfc application compiled _afxdll defined., , a.dll can't mfc app.

is problem use regular dll in case?

thanks,

bryan

maybe i'm misunderstanding, if can't use mfc, , b provides class does, how can instantiate object in a? looking have b have factory function creates object , passes through pointer? in case need ensure b calls delete() on it, not a, because they'll have 2 different heaps.

is com object or mean 'import library'? talking 'regular' dll way stubs in .lib, or 'import library' .tlb? (not matters question think, i'm trying picture situation).


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