111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
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//*******************************************************************************************
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//
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// Filename : Unknown.h
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//
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// Definitions for some customized routines
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//
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// Copyright (c) 1994 - 1996 Microsoft Corporation. All rights reserved
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//
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//*******************************************************************************************
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#ifndef _UNKNOWN_H_
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#define _UNKNOWN_H_
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class CUnknown
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{
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public:
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CUnknown() {}
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virtual ~CUnknown(); // virtual destructor called from Release
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HRESULT QIHelper(REFIID riid, LPVOID *ppvObj, const IID *apiid[], LPUNKNOWN aobj[]);
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ULONG AddRefHelper();
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ULONG ReleaseHelper();
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private:
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CRefCount m_cRef;
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CRefDll m_cRefDll;
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} ;
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// Only for ensuring Release in all control paths
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class CEnsureRelease
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{
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public:
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CEnsureRelease(IUnknown *pUnk) : m_pUnk(pUnk) {}
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~CEnsureRelease() {if (m_pUnk) m_pUnk->Release();}
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operator IUnknown*() {return(m_pUnk);}
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void Attach(IUnknown *pUnk) {m_pUnk = pUnk;}
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private:
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IUnknown *m_pUnk;
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} ;
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class CObjTemp
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{
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public:
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CObjTemp() : m_hObj(0) {}
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~CObjTemp() {}
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operator HANDLE() const {return(m_hObj);}
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HANDLE Attach(HANDLE hObjNew) {HANDLE hObj=m_hObj; m_hObj=hObjNew; return(hObj);}
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HANDLE Detach() {return(Attach(0));}
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protected:
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HANDLE m_hObj;
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} ;
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class CMenuTemp : public CObjTemp
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{
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public:
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CMenuTemp() : CObjTemp() {}
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CMenuTemp(HMENU hm) : CObjTemp() {Attach(hm);}
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~CMenuTemp() {if (m_hObj) DestroyMenu(Detach());}
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operator HMENU() const {return((HMENU)m_hObj);}
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HMENU Attach(HMENU hObjNew) {return((HMENU)CObjTemp::Attach((HANDLE)hObjNew));}
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HMENU Detach() {return((HMENU)CObjTemp::Detach());}
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BOOL CreatePopupMenu() {Attach(::CreatePopupMenu()); return(m_hObj!=NULL);}
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} ;
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class CGotGlobal : public CObjTemp
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{
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public:
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CGotGlobal(HGLOBAL hData, IUnknown *pUnk) : m_erData(pUnk) {Attach(hData);}
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~CGotGlobal() {if (!(IUnknown*)m_erData) GlobalFree(m_hObj);}
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private:
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CEnsureRelease m_erData;
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} ;
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class CHIDA : public CGotGlobal
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{
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public:
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CHIDA(HGLOBAL hIDA, IUnknown *pUnk) : CGotGlobal(hIDA, pUnk)
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{
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m_lpIDA = (LPIDA)GlobalLock(hIDA);
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}
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~CHIDA() {GlobalUnlock(m_hObj);}
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LPCITEMIDLIST operator [](UINT nIndex)
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{
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if (!m_lpIDA || nIndex>m_lpIDA->cidl)
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{
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return(NULL);
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}
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return((LPCITEMIDLIST)(((LPSTR)m_lpIDA)+m_lpIDA->aoffset[nIndex]));
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}
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int GetCount() {return(m_lpIDA ? m_lpIDA->cidl : 0);}
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private:
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LPIDA m_lpIDA;
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} ;
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#endif // _UNKNOWN_H_
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