HRESULT XStoreCreateContext(  
         const XUserHandle user,  
         XStoreContextHandle* storeContextHandle  
)  

void CALLBACK GameLicenseChangedCallback(void* context)
{
    UNREFERENCED_PARAMETER(context);
    printf("**** License Changed ****\r\n");
}

void CreateStoreContextHandle(XUserHandle userHandle, XTaskQueueHandle taskQueueHandle)
{
    // As a rule, it would be a good idea to create one of these
    // and keep it alive through the lifetime of the game
    XStoreContextHandle storeContextHandle;

    HRESULT hr = XStoreCreateContext(userHandle, &storeContextHandle);
    if (FAILED(hr))
    {
        printf("Failed creating store context: 0x%x\r\n", hr);
        return;
    }

    XTaskQueueRegistrationToken gameLicenseChangedToken = { 0 };
    hr = XStoreRegisterGameLicenseChanged(
        storeContextHandle,
        taskQueueHandle,
        storeContextHandle,
        GameLicenseChangedCallback,
        &gameLicenseChangedToken);

    if (FAILED(hr))
    {
        printf("Failed register for game license changed callback: 0x%x\r\n", hr);
        XStoreCloseContextHandle(storeContextHandle);
        return;
    }

    //Unregistering the license changed event and closing the XStoreContextHandle would usually go in the cleanup/shutdown sections of your game code. 
    XStoreUnregisterGameLicenseChanged(
        storeContextHandle,
        gameLicenseChangedToken,
        true);

    XStoreCloseContextHandle(storeContextHandle);
}