What is the effect of the curse used by Dumbledore against Voldemort in their duel in Order of the Phoenix?

I'm not sure I understand what it is that you're asking...???

Nor is meant to be for, my apologies. I was wondering if anyone had any ideas about what the effect of that curse might be. All we know is that is not lethal. We can assume it is powerful, I think, because a. It's Dumbledore fighting Voldemort, here b. Harry feels it's power as it rushes by c. Voldy is forced to conjure a physical shield to block it, which is abnormal, and d. It's silver, which in my opinion seems to imply awesomeness. I hope this clarifies my question and explains my curiosity :)

"that it is not lethal" ahg I blame this itouch :P