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The Mini Shell Extension Framework – Part III

, 18 Sep 2005
Discussion of a small C++ framework to create Windows shell extensions (IShellFolderImpl).
msf091.zip
include
columnprovider.rgs
contextmenu.rgs
contextmenu_sf.rgs
extension.rgs
extractimage_sf.rgs
infotip.rgs
infotip_sf.rgs
propertysheetext.rgs
propertysheetext_sf.rgs
shell32missing.def
shell32missing.lib
shellfolder.rgs
shellfolderwin98.rgs
vvvsample
Copy of sample1.vvv
menuicon.bmp
sample.def
sample.manifest
sample1.vvv
vvv.ico
vvvtest
sample.yyy
sample1.vvv
sample2.vvv
//
// (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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About the Author

Victor Derks
Software Developer (Senior) Schneider Electric
Netherlands Netherlands
Victor lives in Nijmegen, the oldest city in The Netherlands.
He studied Applied Physics in Delft and now works for GE Healthcare.

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