CSWorks uses Microsoft Silverlight for client graphics.

Microsoft Silverlight delivers a full suite of powerful capabilities to business application developers, bringing the best-of-breed .NET platform to browser-based experiences. Silverlight provides an ideal platform for developing and deploying modern business applications for the customer facing and staff-facing applications.

Some Silverlight features that can be especially interesting to industrial automation solution developers:

Scalable graphics: same HMI screen works well for different display resolutions
Animation capabilities allow to visualize any technological process
Open architecture: developers can use third-party UI components and controls
Powerful design tools: Microsoft Visual Studio and Expression Blend

Visit Microsoft Silverlight website to learn more about Silverlight.