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# HCTraceSetPlatformCallbacks

> HCTraceSetPlatformCallbacks

# HCTraceSetPlatformCallbacks

Sets the Platform Callbacks.

## Syntax

```cpp theme={null}
HRESULT HCTraceSetPlatformCallbacks(  
         HCTracePlatformThisThreadIdCallback* threadIdCallback,  
         void* threadIdContext,  
         HCTracePlatformWriteMessageToDebuggerCallback* writeToDebuggerCallback,  
         void* writeToDebuggerContext  
)  
```

### Parameters

*threadIdCallback*   \_In\_\
Type: HCTracePlatformThisThreadIdCallback\*

The thread ID callback.

*threadIdContext*   \_In\_opt\_\
Type: void\*

The thread ID context.

*writeToDebuggerCallback*   \_In\_\
Type: HCTracePlatformWriteMessageToDebuggerCallback\*

The write to debbugger callback.

*writeToDebuggerContext*   \_In\_opt\_\
Type: void\*

The write to debbugger context.

### Return value

Type: HRESULT

Result code for this API operation. Possible values are S\_OK, or E\_HC\_NOT\_INITIALISED.

## Requirements

**Header:** trace.h

**Library:** libHttpClient.GDK.lib

## See also

[trace](/reference/live/httpclient/trace/trace_members)


## Related topics

- [HCTraceSetClientCallback](/reference/live/httpclient/trace/functions/hctracesetclientcallback.md)
- [HCTraceSetEtwEnabled](/reference/live/httpclient/trace/functions/hctracesetetwenabled.md)
- [HCTraceSetTraceToDebugger](/reference/live/httpclient/trace/functions/hctracesettracetodebugger.md)
- [Debug Tracing](/services/playfab/sdks/c/tracing.md)
- [HCTraceInit](/reference/live/httpclient/trace/functions/hctraceinit.md)