MAKEHRESULTsev

MAKEHRESULTsev is a macro used in C++ programming, primarily within Microsoft's Windows development environment, to create HRESULT error codes. HRESULT is a 32-bit value that encodes information about the success or failure of a COM (Component Object Model) operation. The MAKEHRESULTsev macro helps construct these values by combining different components: a severity level, a facility code, and an error code.

The severity level indicates whether the HRESULT represents a success or an error. The facility code identifies the source of the error, such as a specific subsystem or module. The error code provides a unique identifier for the particular error condition within that facility. By using MAKEHRESULTsev, developers can generate standardized error codes that are easily understood and managed by the Windows operating system and COM infrastructure. This facilitates consistent error handling and debugging across different components and applications.

The typical format for an HRESULT created by MAKEHRESULTsev is a combination of these parts. The macro itself is part of the Windows SDK and is intended for internal use by developers working with COM interfaces and error reporting mechanisms. Understanding how HRESULTs are constructed, including the role of macros like MAKEHRESULTsev, is crucial for effective error management in Windows-based software development.