HRESULT XStoreShowRedeemTokenUIAsync(  
         const XStoreContextHandle storeContextHandle,  
         const char* token,  
         const char** allowedStoreIds,  
         size_t allowedStoreIdsCount,  
         bool disallowCsvRedemption,  
         XAsyncBlock* async  
)  

void CALLBACK ShowRedeemTokenUICallback(XAsyncBlock* asyncBlock)
{
    HRESULT hr = XStoreShowRedeemTokenUIResult(asyncBlock);

    if (FAILED(hr))
    {
        printf("Failed redeem token: 0x%x\r\n", hr);
        return;
    }
}

void ShowRedeemTokenUI(XStoreContextHandle storeContextHandle, XTaskQueueHandle taskQueueHandle, const char* token)
{
    auto asyncBlock = std::make_unique<XAsyncBlock>();
    ZeroMemory(asyncBlock.get(), sizeof(*asyncBlock));
    asyncBlock->queue = taskQueueHandle;
    asyncBlock->callback = ShowRedeemTokenUICallback;

    HRESULT hr = XStoreShowRedeemTokenUIAsync(
        storeContextHandle,
        token,
        nullptr,    // Can restrict to specific store IDs
        0,
        false,      // Can prevent CSV (cash gift cards)
        asyncBlock.get());

    if (FAILED(hr))
    {
        printf("Failed to request redeem token: 0x%x\r\n", hr);
        return;
    }
}