> ## 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.

# PFMemIsUsingCustomMemoryFunctions

> Determines if custom memory functions are being used.

Determines if custom memory functions are being used.

## Syntax

```cpp theme={null}
HRESULT PFMemIsUsingCustomMemoryFunctions(  
    bool* isUsingCustomMemoryFunctions  
)  
```

### Parameters

**`isUsingCustomMemoryFunctions`**   bool\*\
*output*

Indicates if custom memory functions are in use.

### Return value

Type: HRESULT

HRESULT return code for this API operation.

## Requirements

**Header:** PFPlatform.h

## See also

[PFPlatform members](https://docs.xbox.com/services/playfab/api-references/c/pfplatform/pfplatform_members.md)


## Related topics

- [Services C API overview - PFPlatform.h](https://docs.xbox.com/services/playfab/api-references/c/pfplatform/pfplatform_members.md)
- [game_chat_free_memory_callback](https://docs.xbox.com/reference/chat/gamechat2/functions/game_chat_free_memory_callback.md)
- [Memory management in the PlayFab Unified SDK](https://docs.xbox.com/services/playfab/sdks/unified-sdk/memory-management.md)
- [PFMemSetFunctions](https://docs.xbox.com/services/playfab/api-references/c/pfplatform/functions/pfmemsetfunctions.md)
- [PFMultiplayerSetMemoryCallbacks](https://docs.xbox.com/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/functions/pfmultiplayersetmemorycallbacks.md)