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

# PFMultiplayerConnectToLobby

> PFMultiplayerConnectToLobby reference for connecting a local PlayFab entity to a lobby it was previously added to via the PlayFab Multiplayer C++ SDK.

Connect to a lobby in which the local PlayFab entity was already added as a member.

## Syntax

```cpp theme={null}
HRESULT PFMultiplayerConnectToLobby(  
    PFMultiplayerHandle handle,  
    const PFEntityKey* newMember,  
    const char* lobbyId,  
    void* asyncContext,  
    PFLobbyHandle* lobby  
)  
```

### Parameters

**`handle`**   PFMultiplayerHandle

The handle of the PFMultiplayer API instance.

**`newMember`**   [PFEntityKey\*](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/pfentitykey_clientsdk)

The local entity connecting to the lobby.

**`lobbyId`**   char\*\
*is null-terminated*

The ID of the Lobby to connect.

**`asyncContext`**   void\*\
*optional*

An optional, app-defined, pointer-sized context value that can be used to associate the completion state change with this call.

**`lobby`**   PFLobbyHandle\*\
*optional, library-allocated output*

The optional, output lobby object which can be used to queue operations for immediate execution of this operation completes.

### Return value

Type: HRESULT

`S_OK` if the call succeeded or an error code otherwise. The human-readable form of the error code can be retrieved via [PFMultiplayerGetErrorMessage()](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pfmultiplayer/functions/pfmultiplayergeterrormessage).

## Remarks

This is an asynchronous operation. Upon successful completion, the title will be provided a [PFLobbyMemberAddedStateChange](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbymemberaddedstatechange) followed by a [PFLobbyUpdatedStateChange](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyupdatedstatechange) and [PFLobbyConnectToLobbyCompletedStateChange](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyconnecttolobbycompletedstatechange) with the [PFLobbyConnectToLobbyCompletedStateChange::result](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyconnecttolobbycompletedstatechange) field set to `S_OK`. Upon a failed completion, the title will be provided a [PFLobbyConnectToLobbyCompletedStateChange](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyconnecttolobbycompletedstatechange) with the [PFLobbyConnectToLobbyCompletedStateChange::result](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyconnecttolobbycompletedstatechange) field set to a failure.

## Requirements

**Header:** PFLobby.h

## See also

[PFLobby members](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/pflobby_members)


## Related topics

- [PlayFab Multiplayer C++ SDK Release Notes](/services/playfab/multiplayer/lobby/lobby-matchmaking-sdks/lobby-and-matchmaking-release-notes.md)
- [PFMultiplayer C/C++ API overview - PFLobby.h](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/pflobby_members.md)
- [PFLobbyStateChangeType](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/enums/pflobbystatechangetype.md)
- [PFLobbyConnectToLobbyCompletedStateChange](/services/playfab/multiplayer/lobby/playfabmultiplayerreference-cpp/pflobby/structs/pflobbyconnecttolobbycompletedstatechange.md)
- [Lobby.ConnectionString](/services/playfab/multiplayer/lobby/unity-multiplayer-api-reference/PlayFab.Multiplayer/Lobby/ConnectionString.md)