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The Mini Shell Extension Framework – Part III

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18 Sep 200516 min read 142K   1.4K   46  
Discussion of a small C++ framework to create Windows shell extensions (IShellFolderImpl).
//
// (C) Copyright by Victor Derks <vba64@xs4all.nl>
//
// See README.TXT for the details of the software licence.
//
#include "stdafx.h"
#include "module.h"
#include "../include/util.h"


CModule _Module;


// Purpose: DLL Entry Point
extern "C" BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	if (!_Module.DllMain(dwReason, lpReserved))
		return false;

	// Enable/Disable dynamic isolation aware code (Windows XP theme support)
	IsolationAwareDllMain(dwReason);

	if (dwReason == DLL_PROCESS_ATTACH)
	{
		// Optimalization: dont't notify when a thread is created.
		ATLVERIFY(DisableThreadLibraryCalls(hInstance));
	}

	return true;
}


// Purpose: Used to determine whether the DLL can be unloaded by COM
STDAPI DllCanUnloadNow()
{
	HRESULT hr = _Module.DllCanUnloadNow();
	ATLTRACE2(atlTraceCOM, 0, _T("SampleShellExtension::DllCanUnloadNow hr = %d\n"), hr);
	return hr;
}


// Purpose: Returns a class factory to create an object of the requested type
STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv)
{
	return _Module.DllGetClassObject(rclsid, riid, ppv);
}


// Purpose: Adds entries to the system registry
STDAPI DllRegisterServer()
{
	HRESULT hr = _Module.DllRegisterServer(/* bRegTypeLib = */ false);

	// Notify the shell that .vvv file association has changed.
	if (SUCCEEDED(hr))
	{
		SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);
	}

	return hr;
}


// Purpose: Removes entries from the system registry
STDAPI DllUnregisterServer()
{
	_Module.DllUnregisterServer(); // note: will fail if already unregistered; not an issue.

	// Notify the shell that .vvv file association has changed.
	SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, NULL, NULL);

	return S_OK;
}

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Written By
Software Developer (Senior) Hitachi High-Tech Analytical Science
Netherlands Netherlands
Victor lives in Nijmegen, the oldest city in The Netherlands.
He studied Applied Physics in Delft and works Hitachi High-Tech Analytical Science.

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