What is the meaning of bits 31 and 30 in the exception code SEH?

Question

I am trying to figure out what the bits in the SEH exception code mean. I found out that bit 28 is reserved by the system for system exceptions from the MSDN article in RaiseException . However, given the exception code 0xC0000005, I cannot understand why this is not 0x00000005. Is a bit diagram an 0xC0000000indicator of something that is not lost to the fog of time? If so, what is it?

Answer 1

From the "Fix Software Exclusions" page on MSDN :

These two bits describe the main status of the code:
11 = error, 00 = success, 01 = informational, 10 = warning.