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HRESULTs

The return value of COM functions and methods is an HRESULT. The values of some HRESULTs have been changed in COM to eliminate all duplication and overlapping with Win32 error codes. Those that duplicate Win32 error codes have been changed to FACILITY_WIN32, and those that overlap remain in FACILITY_NULL. Common HRESULTs and their 32-bit values are listed in the following table.

HRESULT Value Description

E_ABORT

0x80004004

The operation was aborted because of an unspecified error.

E_ACCESSDENIED

0x80070005

A general access-denied error.

E_FAIL

0x80004005

An unspecified failure has occurred.

E_HANDLE

0x80070006

An invalid handle was used.

E_INVALIDARG

0x80070057

One or more arguments are invalid.

E_NOINTERFACE

0x80004002

The QueryInterface method did not recognize the requested interface. The interface is not supported.

E_NOTIMPL

0x80004001

The method is not implemented.

E_OUTOFMEMORY

0x8007000E

The method failed to allocate necessary memory.

E_PENDING

0x8000000A

The data necessary to complete the operation is not yet available.

E_POINTER

0x80004003

An invalid pointer was used.

E_UNEXPECTED

0x8000FFFF

A catastrophic failure has occurred.

S_FALSE

0x00000001

The method succeeded and returned the boolean value FALSE.

S_OK

0x00000000

The method succeeded. If a boolean return value is expected, the returned value is TRUE.

Requirements

To use the return values, you must include winerror.h in your project.

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