Configuration Manager functions return a CONFIGRET value. CONFIGRET is defined as either 16- or 32-bit, depending on the compiler option; 16-bit code returns a 16-bit value and 32-bit code returns a 32-bit value.
Configuration Manager functions return CR_SUCCESS when they are successful. Otherwise, they return one of the following values.
| Value | Meaning |
| CR_ALREADY_SUCH_DEVNODE | Specified device node already exists |
| CR_BUFFER_SMALL | The operation succeeded, but the specified buffer was too small |
| CR_CREATE_BLOCKED | Flags specifies that the devnode should not be created |
| CR_DEFAULT | Return the default result |
| CR_DEVICE_NOT_THERE | Driver could not find device |
| CR_DEVLOADER_NOT_READY | Device loader was not ready |
| CR_DEVNODE_HAS_REQS | Device node already has requirements |
| CR_DLVXD_NOT_FOUND | Dynamically loadable VxD was not found |
| CR_FAILURE | Failure (Arbitrator/Enumerator) |
| CR_INTERRUPTS_DISABLED | Interrupts were disabled |
| CR_INVALID_API | The function cannot be called from ring 3 |
| CR_INVALID_ARBITRATOR | Arbitrator's registration identifier is invalid or there is already such a global arbitrator |
| CR_INVALID_DATA | ISA data is invalid |
| CR_INVALID_DEVICE_ID | Length of device identifier is greater than MAX_DEVICE_ID_LEN |
| CR_INVALID_DEVNODE | Device node is invalid |
| CR_INVALID_FLAG | Flags parameter is invalid |
| CR_INVALID_LOAD_TYPE | Load type is greater than MAX_DLVXD_LOAD_TYPE |
| CR_INVALID_LOG_CONF | Logical configuration is invalid |
| CR_INVALID_NODELIST | Nodelist header is invalid |
| CR_INVALID_POINTER | Specified pointer is invalid |
| CR_INVALID_PRIORITY | Priority number>MAX_LCPRI |
| CR_INVALID_RANGE | End range less than start range |
| CR_INVALID_RANGE_LIST | Range list not valid |
| CR_INVALID_RES_DES | Resource descriptor is invalid |
| CR_INVALID_RESOURCEID | The resource identifier is ResType_All |
| CR_NEED_RESTART | The config handler could not dynamically start the device, but will be able too the next boot |
| CR_NO_ARBITRATOR | Resource has no arbitrator |
| CR_NO_MORE_HW_PROFILES | No more hardware profiles |
| CR_NO_MORE_LOG_CONF | No more logical configurations |
| CR_NO_MORE_RES_DES | No more resource descriptors |
| CR_NO_REGISTRY_HANDLE | Operation will not produce registry entry |
| CR_NO_SUCH_DEVNODE | Device node could not be located |
| CR_NO_SUCH_LOGICAL_DEV | Logical device not found in ISAPNP conversion |
| CR_NO_SUCH_VALUE | Registry value does not exist |
| CR_NOT_DISABLEABLE | That devnode cannot be disable right now |
| CR_NOT_SYSTEM_VM | The service must be coming from the system VM |
| CR_OUT_OF_MEMORY | Out of memory |
| CR_REGISTRY_ERROR | Registry failed |
| CR_REMOVE_VETOED | The hardware tree should not be removed |
| CR_WRONG_TYPE | Registry value is of other type |