BROWSECF.CPP (BROWSEH OLE Sample)
/*************************************************************************
-
- OLE Automation TypeLibrary Browse Helper Sample
-
- BrowseHelpercf.cpp
-
- CBrowseHelperCF (class factory) implementation
-
- Written by Microsoft Product Support Services, Windows Developer Support
- (c) Copyright Microsoft Corp. 1994 All Rights Reserved
-
- ***********************************************************************/
#include <windows.h>
#include <windowsx.h>
#ifdef WIN16
#include <ole2.h>
#include <compobj.h>
#include <dispatch.h>
#include <variant.h>
#include <olenls.h>
#endif
#include "browseh.h"
CBrowseHelperCF::CBrowseHelperCF(void)
{
m_cRef = 0;
}
/*
* CBrowseHelperCF::QueryInterface, AddRef, Release
*
* Purpose:
* Implements IUnknown::QueryInterface, AddRef, Release
*
*/
STDMETHODIMP
CBrowseHelperCF::QueryInterface(REFIID iid, void FAR* FAR* ppv)
{
*ppv = NULL;
if (iid == IID_IUnknown || iid == IID_IClassFactory)
*ppv = this;
else
return ResultFromScode(E_NOINTERFACE);
AddRef();
return NOERROR;
}
STDMETHODIMP_(ULONG)
CBrowseHelperCF::AddRef(void)
{
return ++m_cRef;
}
STDMETHODIMP_(ULONG)
CBrowseHelperCF::Release(void)
{
if(--m_cRef == 0)
{
delete this;
return 0;
}
return m_cRef;
}
/*
* CBrowseHelperCF::CreateInstance, LockServer
*
* Purpose:
* Implements IClassFactory::CreateInstance, LockServer
*
*/
STDMETHODIMP
CBrowseHelperCF::CreateInstance(IUnknown FAR* punkOuter,
REFIID riid,
void FAR* FAR* ppv)
{
CBrowseHelper FAR* pBrowseHelper;
HRESULT hr;
*ppv = NULL;
// This implementation does not allow aggregation
if (punkOuter)
return ResultFromScode(CLASS_E_NOAGGREGATION);
// Create an instance of the BrowseHelper automation object.
hr = CBrowseHelper::Create(&pBrowseHelper);
if (FAILED(hr))
return hr;
hr = pBrowseHelper->QueryInterface(riid, ppv);
if (FAILED(hr))
{
delete pBrowseHelper;
return hr;
}
return NOERROR;
}
STDMETHODIMP
CBrowseHelperCF::LockServer(BOOL fLock)
{
extern ULONG g_cLock;
if (fLock)
g_cLock++;
else
g_cLock--;
return NOERROR;
}
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