Microsoft's Silverlight 4 available Thursday

The rich Internet technology is getting a boost in business-oriented capabilities

Microsoft's Silverlight 4, which is an upgrade to the company's rich Internet browser plug-in platform, is set for release on Thursday, according to Microsoft representatives.

Although the subject of a presentation Tuesday at the Visual Studio 2010 launch event in Las Vegas, the technology will not be available until two days afterward. "This is the fourth release of Silverlight that we've had in the last two-and-a-half years," said Scott Guthrie, corporate vice president of the Microsoft developer division, on Tuesday.

[ InfoWorld's Paul Krill reported on Microsoft shipping Visual Studio 2010 on Monday. | Cut straight to the key news for technology development and IT management with the InfoWorld Daily newsletter, our once-a-day summary of the top tech stories. ]

A Microsoft official Monday stressed "line of business" capabilities in Silverlight 4, including printing and control capabilities, with controls offered for functions like charting.

"A lot of the corporate accounts that we work with, a lot of the ISVs that we work with, they've been waiting for this functionality," said Eddie Amos, Microsoft general manager for developer platform and tools product management and marketing.

Version 4 also offers more refined capabilities for running Silverlight applications outside of a browser. It provides XAP signing and verification for application integrity as well as custom window chrome for application presentation flexibility, Microsoft said.

Also featured in Silverlight 4 is support for the Google Chrome browser.

The April 15 rollout will feature the Silverlight runtime and a plug-in for Visual Studio. Silverlight 4 will be available at Microsoft's Website.

Silverlight also is being leveraged for development of applications for the upcoming Windows Phone 7 platform.

A newcomer to Silverlight at Microsoft's launch event  liked the embedded aspect of Silverlight. Microsoft officials detailed on Tuesday how Silverlight 4 can run on embedded devices, including Blu-Ray systems. Silverlight, said Steve Jones, senior programmer at A&A Machine & Fabrication, "looks very promising."

"It's coming out on the embedded hardware. That looks pretty exciting," Jones said.

Previously, officials at Sun Microsystems (which has since been acquired by Oracle) have touted Blu-ray capabilities for JavaFX technology, which rivals Silverlight.

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