CLSFACT.CPP

/************************************************************************** 
   THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF 
   ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO 
   THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A 
   PARTICULAR PURPOSE. 
 
   Copyright 1997 Microsoft Corporation.  All Rights Reserved. 
**************************************************************************/ 
 
/************************************************************************** 
 
   File:          ClsFact.cpp 
    
   Description:   Implements CClassFactory. 
 
**************************************************************************/ 
 
/************************************************************************** 
   #include statements 
**************************************************************************/ 
 
#include "ClsFact.h" 
 
/************************************************************************** 
   private function prototypes 
**************************************************************************/ 
 
/************************************************************************** 
   global variables 
**************************************************************************/ 
 
/////////////////////////////////////////////////////////////////////////// 
// 
// IClassFactory implementation 
// 
 
/************************************************************************** 
 
   CClassFactory::CClassFactory 
 
**************************************************************************/ 
 
CClassFactory::CClassFactory() 
{ 
m_ObjRefCount = 1; 
g_DllRefCount++; 
} 
 
/************************************************************************** 
 
   CClassFactory::~CClassFactory 
 
**************************************************************************/ 
 
CClassFactory::~CClassFactory() 
{ 
g_DllRefCount--; 
} 
 
/************************************************************************** 
 
   CClassFactory::QueryInterface 
 
**************************************************************************/ 
 
STDMETHODIMP CClassFactory::QueryInterface(REFIID riid, LPVOID *ppReturn) 
{ 
*ppReturn = NULL; 
 
if(IsEqualIID(riid, IID_IUnknown)) 
   { 
   *ppReturn = this; 
   } 
    
else if(IsEqualIID(riid, IID_IClassFactory)) 
   { 
   *ppReturn = (IClassFactory*)this; 
   }    
 
if(*ppReturn) 
   { 
   (*(LPUNKNOWN*)ppReturn)->AddRef(); 
   return S_OK; 
   } 
 
return E_NOINTERFACE; 
}                                              
 
/************************************************************************** 
 
   CClassFactory::AddRef 
 
**************************************************************************/ 
 
STDMETHODIMP_(DWORD) CClassFactory::AddRef() 
{ 
return ++m_ObjRefCount; 
} 
 
 
/************************************************************************** 
 
   CClassFactory::Release 
 
**************************************************************************/ 
 
STDMETHODIMP_(DWORD) CClassFactory::Release() 
{ 
if(--m_ObjRefCount == 0) 
   { 
   delete this; 
   return 0; 
   } 
    
return m_ObjRefCount; 
} 
 
/************************************************************************** 
 
   CClassFactory::CreateInstance 
 
**************************************************************************/ 
 
STDMETHODIMP CClassFactory::CreateInstance(  LPUNKNOWN pUnknown,  
                                             REFIID riid,  
                                             LPVOID *ppObject) 
{ 
*ppObject = NULL; 
 
if(pUnknown != NULL) 
   return CLASS_E_NOAGGREGATION; 
 
//add implementation specific code here 
 
CShellFolder *pShellFolder = new CShellFolder(NULL, NULL); 
if(NULL == pShellFolder) 
   return E_OUTOFMEMORY; 
   
//get the QueryInterface return for our return value 
HRESULT hResult = pShellFolder->QueryInterface(riid, ppObject); 
 
//call Release to decement the ref count 
pShellFolder->Release(); 
 
//return the result from QueryInterface 
return hResult; 
} 
 
/************************************************************************** 
 
   CClassFactory::LockServer 
 
**************************************************************************/ 
 
STDMETHODIMP CClassFactory::LockServer(BOOL) 
{ 
return E_NOTIMPL; 
}