Shielding Wards and White Scrolls

I know that when you use a Shielding Ward on any piece of equipment while having a White Scroll in your inventory it asks you if you want to use it. If you do want to use it, do you click the Ok then, or does a box come up when you're using the actual scroll?
Just wanted to make sure before I went and used them, little worried it might use a White Scroll when using the Shielding Ward and when using the actual scroll.