The only fields in the PE header dealing directly with the stack are: SizeOfStackReserve: 0x00100000 SizeOfStackCommit: 0x00001000

The only fields in the PE header dealing directly with the stack are: SizeOfStackReserve: 0x00100000 SizeOfStackCommit: 0x00001000 Certainly nothing there that indicates which way the stack should grow. PE does not deal with the stack directly.