> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PFEventsWriteTelemetryEventsGetResultSize

> Get the size in bytes needed to store the result of a WriteTelemetryEvents call.

Get the size in bytes needed to store the result of a WriteTelemetryEvents call.

## Syntax

```cpp theme={null}
HRESULT PFEventsWriteTelemetryEventsGetResultSize(  
    XAsyncBlock* async,  
    size_t* bufferSize  
)  
```

### Parameters

**`async`**   XAsyncBlock\*\
*Inout*

XAsyncBlock for the async operation.

**`bufferSize`**   size\_t\*\
*output*

The buffer size in bytes required for the result.

### Return value

Type: HRESULT

Result code for this API operation. If the service call is unsuccessful, the result will be E\_PF\_ENCRYPTION\_KEY\_BROKEN, E\_PF\_EVENT\_ENTITY\_NOT\_ALLOWED, E\_PF\_EVENT\_NAMESPACE\_NOT\_ALLOWED, E\_PF\_INVALID\_EVENT\_CONTENTS, E\_PF\_INVALID\_JSON\_CONTENT, E\_PF\_PER\_ENTITY\_EVENT\_RATE\_LIMIT\_EXCEEDED, E\_PF\_PRODUCT\_DISABLED\_FOR\_TITLE, E\_PF\_TELEMETRY\_KEY\_DEACTIVATED, E\_PF\_TELEMETRY\_KEY\_INVALID or any of the global PlayFab Service errors. See doc page "Handling PlayFab Errors" for more details on error handling.

## Requirements

**Header:** PFEvents.h

## See also

[PFEvents members](https://docs.xbox.com/services/playfab/api-references/c/pfevents/pfevents_members.md)


## Related topics

- [PFEventsWriteTelemetryEventsAsync](https://docs.xbox.com/services/playfab/api-references/c/pfevents/functions/pfeventswritetelemetryeventsasync.md)
- [Services C API overview - PFEvents.h](https://docs.xbox.com/services/playfab/api-references/c/pfevents/pfevents_members.md)
- [PFEventsWriteTelemetryEventsGetResult](https://docs.xbox.com/services/playfab/api-references/c/pfevents/functions/pfeventswritetelemetryeventsgetresult.md)
- [PFEventsWriteEventsGetResultSize](https://docs.xbox.com/services/playfab/api-references/c/pfevents/functions/pfeventswriteeventsgetresultsize.md)
- [PFEventsWriteEventsGetResult](https://docs.xbox.com/services/playfab/api-references/c/pfevents/functions/pfeventswriteeventsgetresult.md)