Can I set Lightroom's white balance picker tool to choose a supposedly white/black spot instead of neutral grey?

Question

I'm correcting white balance issues in **Adobe Lightroom 3**. The `white balance picker tool` in the Develop module lets me to pick a light neutral grey spot in the picture from which Lightroom automatically calculates the needed data for white balance corrections.Can I set the picker so I could choose a spot that **should be white** (or black) **after white balance corrections?**Compare to e.g. **Photoshop's** `curves` and `exposure` tools which both have this feature (choosing either supposedly neutral grey, white or a black spot).I do have access to Photoshop and could correct WB with it, but I'd like to edit the files non-destructively.

Answer 1

...if you want to pick a black or a white to color correct, then just click on either one of those tones to correct the white balance...