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| | Total Hits: 46 | Today: 0 | Author: Thottam R. Sriram | Rating:  |
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Atypical scenario in COM has client objects instantiating server objects and then making calls to those objects. Without a special mechanism, however, it would be very difficult for those server objects to turn around and make calls back to the client objects. COM connection points provide this special mechanism, enabling two-way communication between the server and client. Using connection points, the server can call the client when certain events happen on the server. With connection points, t... |
| | Total Hits: 57 | Today: 0 | Author: Don Box | Rating:  |
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As I write this, about a month has passed since the Orlando PDC in July 2000. This PDC was easily the best Microsoft conference since the Microsoft® Transaction Server (MTS) PDC in Long Beach in 1996. Both events were significant milestones for Microsoft that laid out the blueprints for fundamentally new platforms and programming models. However, the reason that both PDCs are so memorable for me personally is because I spent a great deal of time at both answering the question: "So does this mean... |
| | Total Hits: 117 | Today: 0 | Author: Rick Strahl | Rating: |
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The .Net framework from Microsoft has now been released for almost a year and there is tremendous interest in the new technology. While the technology is fresh and new it's also difficult to start the process of moving to this new platform, especially if you're dealing with existing data and code. .Net provides a number of ways that allow integration with existing technologies, specifically via COM. A few months ago I introduced you to the topic of calling VFP COM components from .Net applicatio... |
| | Total Hits: 86 | Today: 0 | Author: ggarung | Rating: |
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In this article I cover the area Interoperability issues. There is no doubt that with the help of .Net one can create powerful components and Distributed applications than any other language. But we have to think over about the past reusable components, which were created by many languages such as VB etc.
Is it the Usage of those past components is end after evolving of .Net? No we can use those components in the .Net and the .Net types in the Classic COM clients. Are there any possibilit... |
| | Total Hits: 225 | Today: 0 | Author: Patrick TISSEGHEM | Rating: |
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how existing COM+ applications and new .NET applications can
interoperate with each other. You will be guided through a number of demonstrations in a step-like mannerWe will simulate a real situation where you already have Visual Studio 6.0 and working COM+ applications installed on your machine. You now update to Visual Studio.NET and you need to reuse previous developments. This lab setup thus requires that you have both Visual Studio 6.0 and Visual Studio.NET running on a single machine o... |
| | Total Hits: 2558 | Today: 0 | Author: Aadil | Rating: |
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In this article I’ll try to explain how you can call Win32 API functions from within C# using PInvoke and .NET Interpretability. Although the Microsoft .NET framework provides many API’s to use such as for stream based IO it provides the System.IO namespace and if you want to work with windows, forms or dialogs the System.Forms and System.Drawing namespaces contain lots of use full classes, there are times when you need to go beyond these capabilities.... |
| | Total Hits: 848 | Today: 0 | Author: Mike Becker | Rating: |
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Using .NET objects from COM-based applications can generate the undocumented error 0x80131040. Mike Becker describes possible reasons for this error and looks at techniques for investigating the problem using .NET Framework tools.... |
| | Total Hits: 353 | Today: 0 | Author: Juval Löwy | Rating: |
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.NET is the new platform from Microsoft used to build component-based applications, from standalone desktop applications to web-based applications and services. The platform will be available on forthcoming Microsoft operating systems and supported by the next release of Visual Studio, called Visual Studio.NET. In addition to providing a modern object-oriented framework for building distributed applications, .NET also provides several specialized application frameworks. These frameworks include ... |
| | Total Hits: 55 | Today: 0 | Author: Jerry.Wang | Rating:  |
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The wrapping class lib for MSXML3.0/4.0/5.0/6.0 is a easy for use classes, which are made up by CXml / CXmlNode / CXmlNodes / CXsl... |
| | Total Hits: 105 | Today: 0 | Author: Ken Spencer | Rating: |
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Developers frequently ask me for clarification on Microsoft's strategy for the future with regard to COM+, Microsoft® Transaction Services (MTS) with its features of JIT activation and object pooling, Microsoft Message Queuing (MSMQ), and DCOM. What's in store for Web farms versus app servers versus ASP and component integration? Since everybody's clamoring for answers, let's take these questions one at a time. First, I'll deal with the COM+ and MTS issue.... |
| | Total Hits: 58 | Today: 0 | Author: Aaron Skonnard | Rating: |
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If interoperability is the main promise of Web services, why is it that so many developers and organizations have a difficult time achieving it in practice? With all due respect to our hard-working standards bodies, the primary culprits are the imperfect specifications guiding today's implementations. Ambiguities and too many choices often lead to differing interpretations, resulting in incompatible implementations.
Hence, responsibility lies with the developer for early identification of... |
| | Total Hits: 37 | Today: 0 | Author: Thottam R. Sriram | Rating: |
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COM is a wonderful technology. One aspect of the common language runtime (CLR) that makes it an extremely powerful platform is that it allows seamless interactions between Microsoft® .NET applications and unmanaged COM components. However, when I searched the Web, I found few working samples demonstrating the very basic concepts of COM interop. The purpose of this column is to illustrate those basic concepts in order to provide solid working examples that can jump-start users in this technology.... |
| | Total Hits: 98 | Today: 0 | Author: Guy Balteriski. | Rating: |
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This article describes high-performing interoperability solution between the Java platform and the .NET framework. The suggested solution does not replace the Java Virtual Machine or the .NET framework runtime, instead, your JVM or .NET are each hosted within the opposing runtime environment.... |
| | Total Hits: 50 | Today: 0 | Author: Scott Rutherford | Rating: |
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Microsoft Visual Studio .NET makes linking to COM components extremely easy. You simply right click "References" in the Project Explorer, and Add New Reference. You can then browse through the available .NET Assemblies and COM components to find the code library you wish to automate. Every COM interface available on the machine is described by a Type Library (commonly held in a TLB file, and referenced by a CLASSID in the Registry). When you add this reference to your project, the type library i... |
| | Total Hits: 85 | Today: 0 | Author: Gsuttie | Rating: |
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The following is an example of some Com Interop to legacy MTS Components which are housed on a seperate server.
Lets say for example that the Component we want to use is called MyComponent. MyComponent.dll sits on server B and we have to DCOM to this due to the fact that we have been provided with MyComponent.tlb and MyComponent.dll (we dont get want to register the dll on the box as this would defeat the purpose).
Firstly we need to get the tlb and vbr pointing from our box Server... |
| | Total Hits: 34 | Today: 0 | Author: Tim McCarthy, Paul D. Sheriff | Rating: |
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Add new Microsoft .NET components to existing COM and COM+ applications and they will be able to work together; this will help you if you need to develop a .NET application that can do things like participate in transactions, take advantage of role-based security, or interact with a queue. You probably have used COM+ Applications to host components that you have written in Visual Basic or C++. COM+ offers many valuable services, such as transactions, queued components, just-in-time activation, r... |
| | Total Hits: 77 | Today: 0 | Author: Microsoft Corporation | Rating: |
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This article provides a roadmap for learning and mastering how to use ActiveX Data Objects (ADO) via Component Object Model (COM) Interop on the Microsoft .NET platform. Roadmap articles provide links to useful information, including online documentation, Microsoft Knowledge Base (KB) articles, and white papers to assist you with learning a Microsoft product or technology.... |
| | Total Hits: 61 | Today: 0 | Author: Rob Caron | Rating:  |
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The new Simple Object Access Protocol (SOAP) Toolkit for Visual Studio 6.0 provides the infrastructure for developers to build, expose, and consume Web services. With a few exceptions that are outlined in the toolkit, the SOAP Toolkit complies with the SOAP version 1.1 specification. It includes the Remote Object Proxy Engine (ROPE), a Service Description and Code Generation Wizard, and code that provides ASP and ISAPI reference implementations of SOAP listeners. This article describes the tools... |
| | Total Hits: 22 | Today: 0 | Author: Tim Ewald | Rating: |
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The .NET Common Language Runtime (CLR) is Microsoft's next-generation component technology. The CLR is a replacement for COM, but not for COM+. COM+, now called .NET Enterprise Services, is the Microsoft object runtime environment for scalable system development. This article explains how to implement and deploy COM+ configured classes using the CLR, how to access object context and call context, and the rules for managing context-relative object references. Also discussed are ways to manage pre... |
| | Total Hits: 53 | Today: 0 | Author: Jim Sievert | Rating: |
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The .NET Framework offers several methods for customizing the presentation of native .NET and COM object types. One such technique, custom marshaling, refers to the notion of specializing object type presentations. There are times, like when a legacy COM component needs to implement a new interface or when you need to make calls across process or machine boundaries, when custom marshaling saves the day. Elements of COM Interop permit the customizing of COM types while .NET Remoting offers the de... |
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