"Steve Ballmer not speaking at Apple Dev Conf. Nor appearing on Dancing with the Stars. Nor riding in the Belmont. Just FYI," the tweet said. The company, however, has no plans to support Objective-C, a Microsoft representative said.

Visual Studio 2010 accommodations for Objective-C would benefit Microsoft, an analyst said, though Visual Studio currently does not support Objective-C development. "If Visual Studio was to support Objective-C, it would be a great strategic move for Microsoft," said IDC analyst Al Hilwa.

(This story was updated on May 27, 2010, with new information from Microsoft regarding Objective-C development.)

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