He financed some operations. Everyone knows we armed the Mujihadeen against the Soviets. You might recall, that policy began under Jimmy Carter. Bin Laden was not directly recruited by the CIA, but he participated in the war against the Soviets, primarily by financing the rebels.
Here is an excerpt of a review, published in the _New York Review of Books_, by Ahmed Rashid of Steve Coll's_ Ghost Wars: The Secret History of the CIA, Afghanistan, and bin Laden, from the Soviet Invasion to September 10, 2001_
"When the US walked away from Afghanistan in 1989, it left behind a seasoned group of jihadists, whose brand of radical Islam had found an enormously rich supporter in Osama bin Laden. The son of a Saudi billionaire, bin Laden had joined the jihad shortly after the Soviet invasion, using his financial resources to build military facilities and training camps for volunteer fighters. Bin Laden first began to turn his radical energies against the United States in 1990, when the Saudi royal family agreed to invite American troops to be stationed in Saudi Arabia as part of its alliance against Iraq. Coll quotes Prince Turki, the Saudi intelligence chief, suggesting that this was the moment when bin Laden's extremism and hatred for American infidels began to assert itself: "He changed from a calm, peaceful, and gentle man interested in helping Muslims into a person who believed that he would be able to amass and command an army...."
The full review is available here:
http://www.nybooks.com/articles/17114