Error Handling
COM+ functions and object methods typically return an HRESULT (handle to a result). The HRESULT is actually a 32-bit value that represents success, warning, or error codes.
The high-order bit of the HRESULT is the severity code. A zero severity represents success (SEVERITY_SUCCESS) and a one severity represents failure (SEVERITY_FAILURE). The next four high-order bits are reserved (always set to zero). The sixth through sixteenth high-order bits represent the facility. The facility can be any of the following:
| FACILITY_WINDOWS | 8 |
| FACILITY_STORAGE | 3 |
| FACILITY_SSPI | 9 |
| FACILITY_SETUPAPI | 15 |
| FACILITY_RPC | 1 |
| FACILITY_WIN32 | 7 |
| FACILITY_CONTROL | 10 |
| FACILITY_NULL | 0 |
| FACILITY_MSMQ | 14 |
| FACILITY_MEDIASERVER | 13 |
| FACILITY_INTERNET | 12 |
| FACILITY_ITF |
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