Shell Extensibility - Explorer Desk Band, Tray Notification Icon et al.

// CalendarDeskBand.cpp : Implementation of DLL Exports.

#include "stdafx.h"
#include "CalendarGuids.h"
#include "DllMain.h"

// Used to determine whether the DLL can be unloaded by OLE
STDAPI DllCanUnloadNow(void)
{
    return _AtlModule.DllCanUnloadNow();
}


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


// DllRegisterServer - Adds entries to the system registry
STDAPI DllRegisterServer(void)
{
    // registers object, typelib and all interfaces in typelib
	return _AtlModule.DllRegisterServer(/*bRegTypeLib =*/ FALSE);
}


// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void)
{
	return _AtlModule.DllUnregisterServer(/*bUnRegTypeLib =*/ FALSE);
}

// DllInstall - Adds/Removes entries to the system registry per user
//              per machine.	
STDAPI DllInstall(BOOL bInstall, LPCWSTR pszCmdLine)
{
    HRESULT hr = E_FAIL;
    static const wchar_t szUserSwitch[] = _T("user");

    if (pszCmdLine != NULL)
    {
    	if (_wcsnicmp(pszCmdLine, szUserSwitch, _countof(szUserSwitch)) == 0)
    	{
    		AtlSetPerUserRegistration(true);
    	}
    }

    if (bInstall)
    {	
    	hr = DllRegisterServer();
    	if (FAILED(hr))
    	{	
    		DllUnregisterServer();
    	}
    }
    else
    {
    	hr = DllUnregisterServer();
    }

    return hr;
}