urlfenum.cpp

大量windows shell编程例子

// CUrlfEnumItem member functions
#include "stdhdr.h"
#include "urlfenum.h"




/*-------------------------------------------------------------------*/
// Procedure....: CUrlfEnumItem()
// Description..: Constructor of the class
/*-------------------------------------------------------------------*/
CUrlfEnumItem::CUrlfEnumItem( CUrlfFolder *phf, DWORD uFlags ) 
{
	m_iCount = 0;
	m_uFlags = uFlags;
	m_phfThis = phf;
	phf->AddRef();
}


/*-------------------------------------------------------------------*/
// Procedure....: ~CUrlfEnumItem()
// Description..: Destructor of the class
/*-------------------------------------------------------------------*/
CUrlfEnumItem::~CUrlfEnumItem()
{
	m_phfThis->Release();
}






/*-------------------------------------------------------------------*/
// Procedure....: ::QueryInterface()
// Description..: return a pointer to the specified interface
/*-------------------------------------------------------------------*/
STDMETHODIMP CUrlfEnumItem::QueryInterface( REFIID riid, LPVOID FAR *ppv )
{
    if( IsEqualIID(riid, IID_IUnknown) ) 
	{
        *ppv = (IUnknown *) this;
        m_cRef++;
        return NOERROR;
    }
    else 
	if( IsEqualIID(riid, IID_IEnumIDList) ) 
	{
        *ppv = (IEnumIDList *) this;
        m_cRef++;
        return NOERROR;
    }
    else 
	{
        *ppv = NULL;
        return ResultFromScode( E_NOINTERFACE );
    }
}





/*-------------------------------------------------------------------*/
// Procedure....: ::AddRef()
// Description..: increase the reference count for the server 
/*-------------------------------------------------------------------*/
STDMETHODIMP_(ULONG) CUrlfEnumItem::AddRef()
{
    return ++m_cRef;
}
 




/*-------------------------------------------------------------------*/
// Procedure....: ::Release()
// Description..: decrease the reference count for the server 
/*-------------------------------------------------------------------*/
STDMETHODIMP_(ULONG) CUrlfEnumItem::Release()
{
    if( --m_cRef==0 )
        delete this;
    return m_cRef;
}







// IMPLEMENTED
// IEnumIDList methods
//
//   - Next
//   - Reset



/*-------------------------------------------------------------------*/
// Procedure....: Reset()
// Description..: Reset the enumeration
/*-------------------------------------------------------------------*/
STDMETHODIMP CUrlfEnumItem::Reset()
{
	m_iCount = 0;
	return NOERROR;
}


/*-------------------------------------------------------------------*/
// Procedure....: Next()
// Description..: Returns the next item in the list
/*-------------------------------------------------------------------*/
STDMETHODIMP CUrlfEnumItem::Next( ULONG celt, LPITEMIDLIST *rgelt,
	ULONG *pceltFetched )
{
	return S_OK;
}





// UNIMPLEMENTED
// IEnumIDList methods
//
//   - Skip
//   - Clone


/*-------------------------------------------------------------------*/
// Procedure....: Skip()
// Description..: 
/*-------------------------------------------------------------------*/
STDMETHODIMP CUrlfEnumItem::Skip( ULONG celt )
{
	return E_NOTIMPL;
}


/*-------------------------------------------------------------------*/
// Procedure....: Clone()
// Description..: 
/*-------------------------------------------------------------------*/
STDMETHODIMP CUrlfEnumItem::Clone( IEnumIDList **ppenum )
{
	return E_NOTIMPL;
}