I have work with a C++ project, and using PlayFab Party as a part of communication in game. I found the way to add PlayFab Library in GDK Xbox here PlayFab Party - Microsoft Game Development Kit | Microsoft Learn . But I have some troubles when built it. Error message with some functions like "error LNK2019: unresolved external symbol PartyTextToSpeechProfileGetLanguageCode referenced in function "public: unsigned int __cdecl Party::PartyTextToSpeechProfile::GetLanguageCode(char const * *)const"