Defrag Tools #191 - HRESULT Error Codes

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In this episode of Defrag Tools, we talk about HRESULT based Error Codes. The 32bits in the HRESULT have meanings, allowing the reader to gain additional insights into the error.

Of note:

The 32nd bit (the top bit) indicates if an error occurred or not. This is why errors are 0x8xxxxxxx.
The 16-26 bits are the Facility - the originating API (Win32, CLR, XAML, etc.).
The 0-15 bits are the (Error) Code.

Common NULL Facility Error Codes

Name	Description	Value
S_OK	Operation successful	0x00000000
S_FALSE	Operation successful but returned no results	0x00000001
E_ABORT	Operation aborted	0x80004004
E_FAIL	Unspecified failure	0x80004005
E_NOINTERFACE	No such interface supported	0x80004002
E_NOTIMPL	Not implemented	0x80004001
E_POINTER	Pointer that is not valid	0x80004003
E_UNEXPECTED	Unexpected failure	0x8000FFFF

Common Win32 Facility Error Codes

These are built by passing a System Error Code to HRESULT_FROM_WIN32

Name	Description	Value
E_ACCESSDENIED	General access denied error	0x80070005
E_HANDLE	Handle that is not valid	0x80070006
E_INVALIDARG	One or more arguments are not valid	0x80070057
E_OUTOFMEMORY	Failed to allocate necessary memory	0x8007000E

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