HELLOCF.CPP (HELLO OLE Sample)
/*************************************************************************
-
- OLE Automation Hello 2.0 Application.
-
- hellocf.cpp
-
- CHelloCF (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 "hello.h"
CHelloCF::CHelloCF(void)
{
m_cRef = 0;
}
/*
* CHelloCF::QueryInterface, AddRef, Release
*
* Purpose:
* Implements IUnknown::QueryInterface, AddRef, Release
*
*/
STDMETHODIMP
CHelloCF::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)
CHelloCF::AddRef(void)
{
#ifdef _DEBUG
TCHAR ach[50];
wsprintf(ach, TEXT("Ref = %ld, Hello Class Factory\r\n"), m_cRef+1);
OutputDebugString(ach);
#endif
return ++m_cRef;
}
STDMETHODIMP_(ULONG)
CHelloCF::Release(void)
{
#ifdef _DEBUG
TCHAR ach[50];
wsprintf(ach, TEXT("Ref = %ld, Hello Class Factory\r\n"), m_cRef-1);
OutputDebugString(ach);
#endif
if(--m_cRef == 0)
{
delete this;
return 0;
}
return m_cRef;
}
/*
* CHelloCF::CreateInstance, LockServer
*
* Purpose:
* Implements IClassFactory::CreateInstance, LockServer
*
*/
STDMETHODIMP
CHelloCF::CreateInstance(IUnknown FAR* punkOuter,
REFIID riid,
void FAR* FAR* ppv)
{
HRESULT hr;
*ppv = NULL;
// This implementation does'nt allow aggregation
if (punkOuter)
return ResultFromScode(CLASS_E_NOAGGREGATION);
// This is REGCLS_SINGLEUSE class factory, so CreateInstance will be
// called atmost once. An application objects has a REGCLS_SINGLEUSE class
// factory. The global application object has already been created when
// CreateInstance is called. A REGCLS_MULTIPLEUSE class factory's
// CreateInstance would be called multiple times and would create a new
// object each time. An MDI application would have a REGCLS_MULTIPLEUSE
// class factory for it's document objects.
hr = g_phello->QueryInterface(riid, ppv);
if (FAILED(hr))
{
g_phello->Quit();
return hr;
}
return NOERROR;
}
STDMETHODIMP
CHelloCF::LockServer(BOOL fLock)
{
CoLockObjectExternal(g_phello, fLock, TRUE);
return NOERROR;
}
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