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ArticlesActive Platform


September 1997 / Cover Story / ActiveX Demystified / Active Platform
David S. Linthicum

Active Platform is Microsoft's view of the world. It uses ActiveX controls as a mechanism to interact with users and to automate everything from COM-enabled transaction processing (TP) monitors to Web servers. It has two parts: Active Server and Active Client.

Active Server is really the middle tier, providing the location for business logic and primary application processing using components or Active Server Pages (ASP). The core technologies of Active Server include NT Server, Microsoft Transaction Server (MTS), data management services, directory services, Web services, and netw ork services. MTS combines traditional TP monitor features, such as thread pooling and database multiplexing, with the Microsoft component-based programming model.

Other components of Active Platform, such as data management services, leverage OLE DB and ODBC to access data sources like DB2, Oracle, and SQL Server. Active Directory provides the directory services layer around Distributed COM (DCOM), allowing remote objects to find each other on the network. The Web services are built around Internet Information Server (IIS), providing scripting mechanisms through ASP for server-side Web application development. Network services are built around DCOM, allowing the controls to connect over the network through the synchronous MS-RPC.

The Active Client is cross-platform. Microsoft is hoping to deliver techno logy to a broad range of operating systems, albeit on its own terms. The plan is to use standard HTML, Microsoft's flavor of the Java virtual machine (JVM), and a scripting engine using Microsoft's VBScript and JScript (Microsoft's version of JavaScript). So where do you find the Active client? It's built into Microsoft Explorer 3 and 4, and it can be part of your client/server application through ActiveX.

For Windows shops, Active Platform provides a sound and scalable server-side application development platform. Since Active Server leverages commodity tools and technologies even with high-end products such as TP monitors, small workgroup or intranet applications won't exceed the capacity of Active Server. While Active Platform targets different environments, it's too dependent on Internet Explorer to drive the client. Explorer is appearing on some non-Windows platforms, but Windows is receiving the best support and the latest versions.


The ActiveX Wor ld

illustration_link (20 Kbytes)

Active Platform's parallel architectures enable high component mobility from client to server.


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Flexible C++
Matthew Wilson
My approach to software engineering is far more pragmatic than it is theoretical--and no language better exemplifies this than C++.

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