Windows Presentation Foundation (WPF)
A graphical subsystem in .NET Framework 3.0, which uses a markup language, known as XAML, for rich user interface development. It provides a consistent programming model for building applications and provides a clear separation between the user interface and the business logic. A WPF application can be deployed on the desktop or hosted in a web browser. It also enables rich control, design, and development of the visual aspects of Windows programs. It aims to unify a number of application services: user interface, 2D and 3D drawing, fixed and adaptive documents, advanced typography, vector graphics, raster graphics, animation, data binding, audio and video. Future Microsoft software will be built on WPF.

Silverlight
A web-based subset of WPF that enables Flash-like web and mobile applications with the same programming model as .NET applications.

Extensible Application Markup Language (XAML)
A declarative XML-based language created by Microsoft which is used to initialize structured values and objects. It is available under Microsoft's Open Specification Promise. In WPF, XAML is used as a user interface markup language to define UI elements, data binding, eventing, and other features. In WF, workflows can be defined using XAML.


The Microsoft .NET Framework provides a rich alternative to the Distributed COM (DCOM) protocol in the form of XML Web services provided by ASP.NET. XML WCF and SOAP Web services allow businesses to distribute their application services to a broader audience than is otherwise possible with DCOM.

DCOM enabled software developers to create applications that span multiple machine, network, and location boundaries, allowing scalability and ease-of-distribution across multiple tiers. Although additional complexity was introduced into the development effort, most of the benefits provided by DCOM (e.g., location independence, security and scalability) were realized to varying degrees. OPC is probably now one of the most widely used implementations of DCOM in industry.

DCOM Security and Firewall Issues
DCOM dynamically allocates one port per process. You need to decide how many ports you want to allocate to DCOM processes, which is equivalent to the number of simultaneous DCOM processes through the firewall. This causes problems for digital security, as applications change all the time which can cause ports to be left open or communication problems when ports are closed. The configuration of applications is usually done by different teams, which adds to the complexity.

You wouldn't put 1996 hardware into your facility, so why are you are doing it with your software? Many of the HMI systems installed today will still be in use as we approach 2020. The graphics and communications used by many HMI systems sold by major vendors on the market today are still using graphics and communication technology from mid 1990's! DCOM (Distributed Component Object Model) has been deprecated by Microsoft. ActiveX controls popular in the mid to late 1990's, have been superseded by two generations of graphics technology.

Creating visually compelling and intuitive HMI and SCADA screens has never been easier. Utilize the power of .NET and WPF to take your HMI and SCADA design to a whole new level. Status uses the XML based XAML (Extensible Application Markup Language) markup language by Microsoft for screen definitions. This means the screens are human readable, portable, can be easily generated, and conform to an industry standard.
  The Status Vision Designer® is a powerful data visualization software package that serves as a sophisticated HMI (Human Machine Interface) designer for manufacturing and other process control industries.

Using Status, companies can display meaningful real-time information such as sales or manufacturing figures or, using the built-in Scheduler, cycle a series of messages generated by the designer for corporate visitors, internal training or other employee messages. The ticker feature included with Status lets you display web-based feeds such as stock market data, weather, news and more.

Optimize your communications with Status. Present and remotely control your message from across the aisle or across the globe on any type of display including plasma or LCD screens, digital billboards or kiosks. Status Vision Designer® allows you to efficiently manage and deliver your digital signage content, saving you time and money.

Status Vision Designer® is the perfect solution for digital signage applications in areas such as corporate communications, education, tourism, retail, financial services, restaurant, conferences, etc.

Status has been built from the ground up leveraging the latest technologies available today.

As the Internet evolves, the nature and scope of distributed applications must change to meet the underlying business needs. Businesses must integrate their applications with those that reside on heterogeneous platforms, and those that are built and deployed with varying programming models. Additionally, businesses need to communicate and expose their services to global clients and partners.

To address these needs, XML Web services were introduced in the .NET Framework. Web services are based on open Internet standards, such as HTTP, XML, and SOAP. Using these open standards, Web services deliver application functionality across the Web to any type of client, on any platform.

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