I've noticed that most Windows error codes come in one of two forms:
- Standard system error codes, e.g. 0x05 is Access Denied.
- Error codes in the form
0xC000xxxx, which I can't find any reference for.
I first considered that the latter error codes were just system error codes that had been bitwise OR'ed with
0xC0000000 for some reason, but this doesn't seem to be the case; they do not match up to the nature of the fault if mapped in that way.
All of the references to such errors on Google seem to be related to application crashes, but no error names are provided.
They don't seem to be application specific, either, since some of the
Nt* APIs inside ntdll.dll return them, e.g.
0xC0000022 when called with bad parameters.
What's the difference between the two types of error code? Does Microsoft officially recognise them as standard error codes? Is there a reference page for them?