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# PFEntityRegisterTokenExpiredEventHandler

> Register a handler for EntityToken expired events.

Register a handler for EntityToken expired events.

## Syntax

```cpp theme={null}
HRESULT PFEntityRegisterTokenExpiredEventHandler(  
    XTaskQueueHandle queue,  
    void* context,  
    PFEntityTokenExpiredEventHandler* handler,  
    PFRegistrationToken* token  
)  
```

### Parameters

**`queue`**   XTaskQueueHandle<br />*optional*

The async queue the callback should be invoked on.

**`context`**   void\*<br />*optional*

Optional pointer to data used by the event handler.

**`handler`**   PFEntityTokenExpiredEventHandler\*

The event handler, XUserRegisterForChangeEvent.

**`token`**   PFRegistrationToken\*<br />*output*

The token for unregistering this callback

### Return value

Type: HRESULT

Result code for this API operation. Possible values are S\_OK, E\_PF\_NOT\_INITIALIZED, or E\_FAIL.

## Requirements

**Header:** PFEntity.h

## See also

[PFEntity members](/services/playfab/api-references/c/pfentity/pfentity_members)


## Related topics

- [PFEntityUnregisterTokenExpiredEventHandler](/services/playfab/api-references/c/pfentity/functions/pfentityunregistertokenexpiredeventhandler.md)
- [Handling Token Expiration](/services/playfab/sdks/c/relogin.md)
- [Entity Handles](/services/playfab/sdks/c/entity-handles.md)
- [Services C API overview - PFEntity.h](/services/playfab/api-references/c/pfentity/pfentity_members.md)
- [PFEntityTokenExpiredEventHandler](/services/playfab/api-references/c/pfentity/functions/pfentitytokenexpiredeventhandler.md)