Weiying Chen's ActiveX programming unleashed PDF

By Weiying Chen

ISBN-10: 1575211548

ISBN-13: 9781575211541

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

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2. There are other two connection types, they are REGCLS_MULTIPEUSE and REGCLS_MULTI_SEPARATE. REGCLS_MULTIPEUSE indicates that multiple applications can connect to the class object via CoGetClassObject, whereas REGCLS_MULTI_SEPARATE indicates that the application has separate control over the each copy of the class object context. 3. g_dwRegister is a returned value, identifying the class object registered. It will be used in CoRevokeClassObject function call. HRESULT RevokeClassFactory() { HRESULT hr; hr = CoRevokeClassObject(g_dwRegister); return hr; } 1.

If the reference count is zero, the object should destroyed since the object is no longer needed. The client application needs to invoke this method whenever the interface is not accessed. 4 demonstrates an implementation of the Release method. 4. Release method implementation. STDMETHODIMP_(ULONG) CLowerStr::Release() { m_dwRef--; if(m_dwRef == 0) delete this; return m_dwRef; } IClassFactory Interface IClassFactory is the interface that class factory object inherits from. In other words, class factory implements the IClassFactory interface.

18. 18. New CLowerStr class. htm (21 of 40) [7/1/2002 11:55:22 PM] Chapter 3 - ActiveX Unleashed }; STDMETHODIMP CLowerStr::QueryInterface(REFIID iid, void **ppv) { HRESULT hr; *ppv = NULL; if((iid == IID_IUnknown) || (iid == IID_ILowerStr) ) { *ppv = (ILowerStr *)this; AddRef(); hr = S_OK; } else if(iid == IID_IHelpLowerStr) { *ppv = (IHelpLowerStr *) this; AddRef(); hr = S_OK; } else { *ppv = NULL; hr = E_NOINTERFACE; } return hr; } STDMETHODIMP CLowerStr::HelpLower() { return S_OK; } 1. Because a new interface (IHelpLowerStr) is exposed by the CLowerStr object, QueryInterface needs to check IHelpLowerStr interface, too.

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ActiveX programming unleashed by Weiying Chen


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