Intentional Leak?

Did Micro$oft intentionally leak portions of it’s source code to the Windoze operating system to cripple the open source movement?  It seems like a distinct possibility when you read quotes like the following from eweek:

Perhaps most at risk is the open-source community and particularly Linux, which are built on the trust among code contributors that none has breached other software copyrights in their development work, said Mark Radcliffe, a partner at law firm Gray Cary, in Palo Alto, Calif.

"The opportunity to give Microsoft an enormous hammer over the open-source community is just waiting there," he said.

Seems to the doctor like the kind of business practice that originally spawned anti-trust investigations from the states and federal government.