Feeds

Microsoft Silverlight - now with hidden Windows bias

So much for cross-platform

Choosing a cloud hosting partner with confidence

PDC Silverlight 4.0 was the big hit at Microsoft's Professional Developer Conference (PDC) this week. "I can see that Silverlight is the future of Windows client development" one attendee told me.

The basis for this enthusiasm is an array of new features that resolve many of the frustrations discovered by developers working with the previous release.

These include printing support, clipboard support, a rich text control, bi-directional and right-to-left text, access to webcams and microphones, right-click and mouse wheel control, multi-touch support, and DRM for both online and offline media. Microsoft is also promising a significant performance boost thanks to better just-in-time compilation.

There are also major changes to Silverlight's out-of-browser functionality, a loose equivalent to Adobe Systems' AIR runtime for Flash. Even when fully sandboxed, which means having the same permissions that would apply to a browser-hosted Silverlight applet, out-of-browser applications get an HTML control, custom window settings, and the ability to fire pop-up notifications. There is also a new trusted mode, which requires user approval, and enables local file access, COM automation, and cross-domain networking access.

Unfortunately, some of these features are not what they first appear. The HTML control in Silverlight 4 is not a new embedded browser from Microsoft, but uses components from Internet Explorer on Windows, or Safari on the Mac, which means that the same content might render differently. The HTML control only works out-of-browser, and simply displays a blank space if browser-hosted. Clipboard support is text-only in the Silverlight 4 beta, though this could change for the full release.

More seriously, COM automation is a Windows-only feature, introducing differentiation between the Mac and Windows implementations. Since cross-platform Mac and Windows is a key Silverlight feature, it is curious that Microsoft has now decided to make it platform-specific in such an important respect. Microsoft Office and parts of the Windows API have a COM interface, so access to COM makes Silverlight a much more capable client.

Brian Goldfarb, director of product marketing, defended this decision. "[Mac and Windows Silverlight] are on a par in every other respect. It's important to give developers choice. We also want to have the option to light up the platform," he said.

Mobile fragmentation

He observed that future mobile implementations of Silverlight may have features such as access to the phone dialer that will not work on the desktop. "It's not terribly different in this situation," he said.

Nevertheless, Silverlight has crossed a threshold. It is now a runtime that has extended functionality only on Windows. That will not help Microsoft win developers from Adobe AIR, which has the same features on both Mac and Windows. There is also the awkward matter of Linux support, which Microsoft leaves to third parties, mostly Novell's Mono but also Intel in the case of Moblin, a version of Linux for netbooks.

This last point is interesting in the context of Google's recently announced Chrome OS, which is based on Linux and likely to prove popular. If it does, Microsoft will have to take Linux support more seriously, or lose all pretense of cross-platform support. Mobile is another awkward area, about which Microsoft said little at PDC other than promising a focus on this at the Mix conference in Las Vegas in March. ®

Remote control for virtualized desktops

More from The Register

next story
Euro Parliament VOTES to BREAK UP GOOGLE. Er, OK then
It CANNA do it, captain.They DON'T have the POWER!
Download alert: Nearly ALL top 100 Android, iOS paid apps hacked
Attack of the Clones? Yeah, but much, much scarier – report
NSA SOURCE CODE LEAK: Information slurp tools to appear online
Now you can run your own intelligence agency
Post-Microsoft, post-PC programming: The portable REVOLUTION
Code jockeys: count up and grab your fabulous tablets
Twitter App Graph exposes smartphone spyware feature
You don't want everyone to compile app lists from your fondleware? BAD LUCK
Microsoft: Your Linux Docker containers are now OURS to command
New tool lets admins wrangle Linux apps from Windows
prev story

Whitepapers

Go beyond APM with real-time IT operations analytics
How IT operations teams can harness the wealth of wire data already flowing through their environment for real-time operational intelligence.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Why CIOs should rethink endpoint data protection in the age of mobility
Assessing trends in data protection, specifically with respect to mobile devices, BYOD, and remote employees.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Seattle children’s accelerates Citrix login times by 500% with cross-tier insight
Seattle Children’s is a leading research hospital with a large and growing Citrix XenDesktop deployment. See how they used ExtraHop to accelerate launch times.