Platform SDK: MAPI |
The HRESULT data type is a 32-bit value that is used to describe an error or warning.
typedef LONG HRESULT;
On 32-bit platforms, the HRESULT data type is the same as the SCODE data type. On 16-bit platforms, an SCODE value is used to generate an HRESULT value.
An HRESULT value is made up of the following fields:
Most MAPI interface methods and functions return HRESULT values to provide detailed result information. HRESULT values are also used widely in OLE interface methods. OLE provides several macros for converting between HRESULT values and SCODE values, another common data type for error handling. For information about the OLE use of HRESULT values, see the OLE Programmer's Reference. For more information about the use of these values in MAPI, see Error Handling and any of the following interface methods: