What's the difference between PE32+ and PE32?

Question

When running CorFlags on some DLL file, some show as PE32 and some show as PE32+. What's the difference?

Histrionics

Answer 1

The PE32 format stands for Portable Executable 32-bit, while PE32+ is Portable Executable 64-bit format.

Please see this article for detailed info.

Wiedmann

Answer 2

The flags interpretation:

Any CPU: PE = PE32 and 32BIT = 0

x86: PE = PE32 and 32BIT = 1

64-bit: PE = PE32+ and 32BIT = 0

Ogle

Answer 3

Here's a more complete list of architecture build options and the corresponding corflags output for the relevant fields:

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                      PE     32BITREQ  32BITPREF 
─────────────────────────────────────────────────
 x86                  PE32          1          0 
 AnyCPU               PE32          0          0 
 AnyCPU prefer 32bit  PE32          0          1 
 x64                  PE32+         0          0 
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Isomorphism