Download PDF by Ted Pattison: Programming Distributed Applications with COM+ and Microsoft

By Ted Pattison

ISBN-10: 073561010X

ISBN-13: 9780735610101

With Programming dispensed functions with COM+ and Microsoft visible simple, programmers observe the best way to execute enterprise-level improvement projects previously available in simple terms within the C++ atmosphere. This astute reference takes the complexities out of the part item version (COM) and explains how you can use the numerous COM-based functions in Microsoft visible easy 6.0 to create scalable, allotted options - with details and assets geared particularly to the visible easy improvement method. Additions to the preferred first variation of this name disguise construction sort libraries with IDL, configured parts, constructing a dispensed software, and utilizing ADO within the heart tier.This name offers the appropriate access aspect for builders who have to comprehend COM+ and Microsoft's part structure for visible uncomplicated programmers. * the writer is a well-known specialist in this topic, and this name has many concrete, hands-on examples to ease task-oriented, company improvement. * firm builders get the proper advent to COM to augment their productiveness. visible easy * builders can leverage their visible uncomplicated services to construct middle-tier enterprise items. * identify is predicated at the extremely popular first model of this e-book, now up to date to debate COM+.

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The class that's reused is called the superclass. The class that benefits from the reuse is the subclass. Visual Basic doesn't currently support implementation inheritance (but I'm sure you've heard all the rumors), so I'll use a Java example to illustrate what implementation inheritance looks like. Examine the following Java class CDog: // Superclass class CDog { // Dog state public String Name; // Dog behavior public void Bark() {/* method implementation */} public void RollOver(int Rolls) {/* method implementation */} } The class CDog contains a property and two methods.

One of the most significant decisions was that client code could not be written using class-based references. The coupling that would occur would be far too damaging. It was obvious that this new object model would have to be based on a formal separation of interface from implementation. The Birth of COM 43 44 The Birth of COM Long before any Visual Basic or Java programmer used keywords such as Implements and interface, the C++ community was building applications using the principles of interface-based programming.

This usage is consistent with the programming models of MTS and COM+. [Previous] [Next] Type Libraries and Language Independence In COM, clients and objects communicate through vTable binding. This implies that clients and objects must be savvy in their use of function pointers. Luckily, the compiler helps C++ programmers by doing most of the work behind the scenes. vTables are automatically created and populated by the C++ compiler on the object side. The C++ compiler can also generate the required client-side binding code that invokes methods through the vTable function pointers.

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Programming Distributed Applications with COM+ and Microsoft Visual Basic 6.0 by Ted Pattison

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