HRESULT XStoreQueryAddOnLicensesAsync(  
         const XStoreContextHandle storeContextHandle,  
         XAsyncBlock* async  
)  

void CALLBACK QueryAddOnLicensesCallback(XAsyncBlock* asyncBlock)
{
    uint32_t count;
    HRESULT hr = XStoreQueryAddOnLicensesResultCount(
        asyncBlock,
        &count);

    if (FAILED(hr))
    {
        printf("Failed retrieve the add-on license count: 0x%x\r\n", hr);
        return;
    }

    printf("Number of add-on licenses: %d", count);

    XStoreAddonLicense* addOnLicenses = new XStoreAddonLicense[count];
    hr = XStoreQueryAddOnLicensesResult(asyncBlock, count, &addOnLicenses);

    if (FAILED(hr))
    {
        printf("Failed retrieve the add-on licenses: 0x%x\r\n", hr);
        delete[] addOnLicenses;
        return;
    }

    for (uint32_t index = 0; index < count; index++)
    {
        printf("expirationDate : %d\r\n", addOnLicenses[index].expirationDate);
        printf("inAppOfferToken: %s\r\n", addOnLicenses[index].inAppOfferToken);
        printf("isActive       : %s\r\n", addOnLicenses[index].isActive ? "true" : "false");
        printf("skuStoreId     : %s\r\n", addOnLicenses[index].skuStoreId);
    }

    delete[] addOnLicenses;
}

void QueryAddOnLicenses(XStoreContextHandle storeContextHandle, XTaskQueueHandle taskQueueHandle)
{
    auto asyncBlock = std::make_unique<XAsyncBlock>();
    ZeroMemory(asyncBlock.get(), sizeof(*asyncBlock));
    asyncBlock->queue = taskQueueHandle;
    asyncBlock->callback = QueryAddOnLicensesCallback;

    HRESULT hr = XStoreQueryAddOnLicensesAsync(
        storeContextHandle,
        asyncBlock.get());

    if (FAILED(hr))
    {
        printf("Failed to get add-on licenses: 0x%x\r\n", hr);
        return;
    }
}