61 lines
1.0 KiB
C++
61 lines
1.0 KiB
C++
#include "datausr.h"
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HRESULT
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GetStgMedpUnkForRelease(IUnknown **pp_unk)
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{
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CStgMedIf *p_smi = new CStgMedIf();
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HRESULT hr = p_smi->QueryInterface(IID_IUnknown, (PPVOID)pp_unk);
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return hr;
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}
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CStgMedIf::CStgMedIf()
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{
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m_cRef = 0;
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}
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STDMETHODIMP
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CStgMedIf::QueryInterface(
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REFIID riid,
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LPLPVOID ppv
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)
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{
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*ppv = NULL;
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if (IsEqualIID(riid, IID_IUnknown))
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{
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*ppv = (LPVOID)this;
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((LPUNKNOWN)*ppv)->AddRef();
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return NOERROR;
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}
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return ResultFromScode(E_NOINTERFACE);
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}
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STDMETHODIMP_(ULONG)
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CStgMedIf::AddRef(void)
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{
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return ++m_cRef;
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}
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STDMETHODIMP_(ULONG)
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CStgMedIf::Release(void)
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{
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ULONG cRefT;
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cRefT = --m_cRef;
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if (0==cRefT)
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{
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TCHAR chBuf[80];
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wsprintf(chBuf, TEXT("Reference Count is %d"), cRefT);
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MessageBox(0,
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chBuf,
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TEXT("STGMED pUnkForRelease"),
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MB_OK);
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delete this;
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}
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return cRefT;
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}
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