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HRESULT

A value returned from a function call to an interface, consisting of a severity code, context information, a facility code, and a status code that describes the result. For 16-bit Windows systems, the HRESULT is an opaque result handle defined to be zero for a successful return from a function, and nonzero if error or status information is to be returned. To convert an HRESULT into a more detailed SCODE (or return value), applications call GetSCode(). See SCODE.