HRESULTs are the 32-bit return value from ORPC methods. The following is a partial list of already defined HRESULTs.
| Value | Meaning |
| S_OK | Success. (0x00000000) |
| E_OUTOFMEMORY | Insufficient memory to complete the call. (0x80000002) |
| E_INVALIDARG | One or more arguments are invalid. (0x80000003) |
| E_NOINTERFACE | No such interface supported (0x80000004) |
| E_ACCESSDENIED | A secured operation has failed due to inadequate security privileges. (0x80070005) |
| E_UNEXPECTED | Unknown, but relatively catastrophic error. (0x8000FFFF) |
| S_FALSE | False. (0x00000001) |
| RPC_S_PROCNUM_OUT_OF_RANGE | The procedure number is out of range. (0xC002002E) |
| RPC_E_INVALID_OXID | The object exporter was not found. (0x80070776) |
| RPC_E_INVALID_OID | The object specified was not found or recognized. (0x80070777) |
| RPC_E_INVALID_SET | The object exporter set specified was not found. (0x80070778) |
| RPC_E_INVALID_OBJECT | The requested object does not exist. (0x80010114) |
| RPC_E_VERSION_MISMATCH | The version of COM on the client and server machines does not match. (0x80010110) |
Further details TBS.