What do SizeOfStackReserve and SizeOfStackCommit mean for a DLL?

Raymond Chen

Nothing. Those fields in the IMAGE_OPTIONAL_HEADER structure are meaningful only when they appear in the EXE. The values provided in DLLs are ignored.

Size­Of­Heap­Reserve and Size­Of­Heap­Commit fall into the same category. In general, flags and fields which control process settings have no effect when declared in a DLL. We’ve seen a few examples already, like the /LARGE­ADDRESS­AWARE flag or the markers which indicate the default layout direction.


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