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# PFLobbyStateChange

> Generic base structure representing an event or state change delivered by the PlayFab Multiplayer Lobby library, used to dispatch specific derived changes.

A generic, base structure representation of an event or change in state in the Lobby library.

## Syntax

```cpp theme={null}
struct PFLobbyStateChange {  
    PFLobbyStateChangeType stateChangeType;  
}  
```

### Members

**`stateChangeType`**   [PFLobbyStateChangeType](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/enums/pflobbystatechangetype)

The specific type of the state change represented.

Use this field to determine which corresponding derived structure is represented by this PFLobbyStateChange structure header.

## Remarks

PFLobbyStateChange structures are reported by [PFMultiplayerStartProcessingLobbyStateChanges()](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerstartprocessinglobbystatechanges) for the title to handle and then promptly pass back via the [PFMultiplayerFinishProcessingLobbyStateChanges()](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerfinishprocessinglobbystatechanges) method. <br /><br /> The `stateChangeType` field indicates which kind of state change occurred, and this base structure should then be cast to a more specific derived structure to retrieve additional event-specific information.

## Requirements

**Header:** PFLobby.h

## See also

[PFLobby members](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/pflobby_members)\
[PFMultiplayerStartProcessingLobbyStateChanges](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerstartprocessinglobbystatechanges)\
[PFMultiplayerFinishProcessingLobbyStateChanges](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerfinishprocessinglobbystatechanges)


## Related topics

- [PFLobbyStateChangeType](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/enums/pflobbystatechangetype.md)
- [PFMultiplayerStartProcessingLobbyStateChanges](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerstartprocessinglobbystatechanges.md)
- [PFMultiplayerFinishProcessingLobbyStateChanges](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/functions/pfmultiplayerfinishprocessinglobbystatechanges.md)
- [Async Lobby and Matchmaking C++ SDK operations guide](/services/playfab/multiplayer/lobby/lobby-and-matchmaking-client-sdk-async.md)
- [PFMultiplayer C/C++ API overview - PFLobby.h](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/pflobby_members.md)