Function ShowGameInviteUI 

pub unsafe extern "system" fn ShowGameInviteUI(
    serviceconfigurationid: HSTRING,
    sessiontemplatename: HSTRING,
    sessionid: HSTRING,
    invitationdisplaytext: HSTRING,
    completionroutine: GameUICompletionRoutine,
    context: *const c_void,
) -> HRESULT