为游戏实现试玩

void CALLBACK GameLicenseTrialCheck(XAsyncBlock* asyncBlock)
{
    XStoreGameLicense result{};

    HRESULT hr = XStoreQueryGameLicenseResult(
        asyncBlock,
        &result);

    // Is this a trial?
    if (result.isActive && result.isTrial)
    {
        // Is this trial owned by this user?  
        if (!result.isTrialOwnedByThisUser)
        {
            // The user can't use another user's trial time. Show an error message.
        }
    }
}

void QueryGameLicense(XStoreContextHandle storeContextHandle, XTaskQueueHandle taskQueueHandle)
{
    auto async = new XAsyncBlock{};
     asyncBlock->queue = m_asyncQueue;
    asyncBlock->callback = GameLicenseTrialCheck;

    HRESULT hr = XStoreQueryGameLicenseAsync(
        storeContextHandle,
        async);
}

void CALLBACK GameLicenseTrialCheck(XAsyncBlock* asyncBlock)
{
    XStoreGameLicense result{};

    HRESULT hr = XStoreQueryGameLicenseResult(
        asyncBlock,
        &result);

    // Is this a trial?
    if (result.isActive && result.isTrial)
    {
        // Is this trial owned by this user?
        if (!result.isTrialOwnedByThisUser)
        {
            // The user can't use another user's trial time. Show an error message.
        }
        else
        {
            // Read the trialUniqueId that was saved with the game on the first run.
            char trialUniqueId = GetSavedTrialUniqueId();
            if (trialUniqueId != result.trialUniqueId)
            {
                // Because the IDs don't match, start the game from the beginning.
            }
        }
    }
}