| WD_STATUS_SUCCESS | Success |
| WD_STATUS_INVALID_WD_HANDLE | Invalid WinDriver handle |
| WD_WINDRIVER_STATUS_ERROR | Error |
| WD_INVALID_HANDLE | Invalid handle |
| WD_INVALID_PIPE_NUMBER | Invalid pipe number |
| WD_READ_WRITE_CONFLICT | Conflict between read and write operations |
| WD_ZERO_PACKET_SIZE | Packet size is zero |
| WD_INSUFFICIENT_RESOURCES | Insufficient resources |
| WD_UNKNOWN_PIPE_TYPE | Unknown pipe type |
| WD_SYSTEM_INTERNAL_ERROR | Internal system error |
| WD_DATA_MISMATCH | Data mismatch |
| WD_NO_LICENSE | No valid license |
| WD_NOT_IMPLEMENTED | Function not implemented |
| WD_KERPLUG_FAILURE | Kernel PlugIn failure |
| WD_FAILED_ENABLING_INTERRUPT | Failed enabling interrupt |
| WD_INTERRUPT_NOT_ENABLED | Interrupt not enabled |
| WD_RESOURCE_OVERLAP | Resource overlap |
| WD_DEVICE_NOT_FOUND | Device not found |
| WD_WRONG_UNIQUE_ID | Wrong unique ID |
| WD_OPERATION_ALREADY_DONE | Operation already done |
| WD_SET_CONFIGURATION_FAILED | Set configuration operation failed |
| WD_CANT_OBTAIN_PDO | Cannot obtain PDO |
| WD_TIME_OUT_EXPIRED | Timeout expired |
| WD_IRP_CANCELED | IRP operation cancelled |
| WD_FAILED_USER_MAPPING | Failed to map in user space |
| WD_FAILED_KERNEL_MAPPING | Failed to map in kernel space |
| WD_NO_RESOURCES_ON_DEVICE | No resources on the device |
| WD_NO_EVENTS | No events |
| WD_INVALID_PARAMETER | Invalid parameter |
| WD_INCORRECT_VERSION | Incorrect WinDriver version installed |
| WD_TRY_AGAIN | Try again |
| WD_INVALID_IOCTL | Received an invalid IOCTL |
| WD_OPERATION_FAILED | Operation failed |
| WD_INVALID_32BIT_APP | Received an invalid 32-bit IOCTL |
| WD_TOO_MANY_HANDLES | No room to add handle |
| WD_NO_DEVICE_OBJECT | Driver not installed |
