Return Codes
| Code | Description |
|---|---|
| WHLLOK | The PS is uninhibited and ready for input. |
| WHLLNOTCONNECTED | Your WinHLLAPI application is not connected to a valid host session. |
| WHLLPSBUSY | Function timed out while still inhibited. |
| WHLLNHIBITED | The PS is inhibited. |
| SHLLSYSERROR | The function failed due to a system error. |
| WHLLCANCEL | The asynchronous function was cancelled. |