Download e-book for iPad: ActiveX programming unleashed by Weiying Chen

By Weiying Chen

ISBN-10: 1575211548

ISBN-13: 9781575211541

A consultant to net programming with ActiveX. The publication covers ActiveX Controls, lively scripts, ActiveX records, web Server API (ISAPI), low and high point interfaces for downloading info from the net, ActiveX Server Framework and sceurity and optimization matters for ActiveX programmers

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Each interface groups its own functionality. 3. CPrint COM server. In order to uniquely identify the class object provided by the COM server, a class identifier(CLSID) is used, whereas to identify the interface, an interface identifier(IID) is used. EXE file. A DLL based COM server is called an in-process(in-proc for short) server because it loads into the same address space as the client. The client can make direct call to the object, which is faster and more efficient. But the crash of the DLL can destroy the client's address space.

It is different from an object in object-oriented programming. In Object-Oriented programming, an object called OO object here is an entity that has state, behavior and identity. The OO object's state is represented by the value of the attributes in the object. But a COM object's state is implied by the interface; the state is not explicitly stated, because there are no public attributes exposed in the interface. The Interface is just a set of functions without any attributes. The OO object's behavior is a sequence of messages sent to the object, which is a sequence of methods called on this object.

1. 1. Initialize the COM library by calling CoInitialize(NULL). OleInitialize can be called instead of CoInitialize, because OleInitialize initializes OLE library, which is a superset of the COM library. 2. 2. Create an instance of the CLowerStr by invoking CoCreateInstance(CLSID_CLowerStr 0, CLSCTX_INPROC_SERVER, IID_ [icc]ILowerStr, (void**)&pLoweStr) 1. CLSID_CLowerStr specifies the CLSID of the CLowerStr object. 2. 0 indicates that the object is not created as part of an aggregate. 3. CLSCTX_INPROC_SERVER is one type of CLSCTX.

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ActiveX programming unleashed by Weiying Chen


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