Source code of Windows XP (NT5)
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#ifndef _INC_DSKQUOTA_FACTORY_H
#define _INC_DSKQUOTA_FACTORY_H
///////////////////////////////////////////////////////////////////////////////
/* File: factory.h
Description: Contains declaration for the class factory object.
Revision History:
Date Description Programmer
-------- --------------------------------------------------- ----------
05/22/96 Initial creation. BrianAu
08/15/96 Added shell extension support. BrianAu
02/04/98 Added creation of IComponent. BrianAu
*/
///////////////////////////////////////////////////////////////////////////////
class DiskQuotaUIClassFactory : public IClassFactory
{
public:
DiskQuotaUIClassFactory(void)
: m_cRef(0) { }
//
// IUnknown methods
//
STDMETHODIMP
QueryInterface(
REFIID,
LPVOID *);
STDMETHODIMP_(ULONG)
AddRef(
VOID);
STDMETHODIMP_(ULONG)
Release(
VOID);
//
// IClassFactory methods
//
STDMETHODIMP
CreateInstance(
LPUNKNOWN pUnkOuter,
REFIID riid,
LPVOID *ppvOut);
STDMETHODIMP
LockServer(
BOOL fLock);
private:
LONG m_cRef;
//
// Prevent copying.
//
DiskQuotaUIClassFactory(const DiskQuotaUIClassFactory& rhs);
DiskQuotaUIClassFactory& operator = (const DiskQuotaUIClassFactory& rhs);
};
//
// Since dskquoui.dll can offer up two somewhat-related objects (a shell extension
// and an MMC snapin extension), we create this intermediary class in case someone
// calls IClassFactory::CreateInstance asking for IUnknown (MMC does this). When
// this happens, we don't know what object the client wants. The caller then can
// query this proxy object for a specific interface and the proxy generates the
// appropriate object.
//
class InstanceProxy : public IUnknown
{
public:
InstanceProxy(void)
: m_cRef(0) { }
~InstanceProxy(void) { }
//
// IUnknown methods
//
STDMETHODIMP QueryInterface(REFIID, LPVOID *);
STDMETHODIMP_(ULONG) AddRef(VOID);
STDMETHODIMP_(ULONG) Release(VOID);
private:
LONG m_cRef;
};
#endif // _INC_DSKQUOTA_FACTORY_H