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48 lines
1.7 KiB
48 lines
1.7 KiB
// Helper to create a IExtractIcon handler.
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//
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// Usage:
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// (1) Derive from CExtractIconBase to implement your business logic by
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// overloading CExtractIconBase two virtual member fcts
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// ex: class CEIBMyDerivedClass : public CExtractIconBase
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//
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// (2) Add a few Initalization member fcts
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// ex: HRESULT CEIBMyDerivedClass::MyInit(MyData1* p1, MyData2* p2);
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//
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// (3) Create your derived object using the new operator,
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// ex: CEIBMyDerivedClass* peibmdc = new ...
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//
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// (4) Initialize it (using (2)),
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// ex: hr = peibmdc->MyInit(p1, p2);
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//
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class CExtractIconBase : public IExtractIconA, public IExtractIconW
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{
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public:
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// IExtractIconA
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STDMETHODIMP GetIconLocation(UINT uFlags, LPSTR pszIconFile, UINT cchMax, int* piIndex, UINT* pwFlags);
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STDMETHODIMP Extract(LPCSTR pszFile, UINT nIconIndex, HICON* phiconLarge, HICON* phiconSmall, UINT nIconSize);
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// IExtractIconW
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STDMETHODIMP GetIconLocation(UINT uFlags, LPWSTR pszIconFile, UINT cchMax, int* piIndex, UINT* pwFlags);
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STDMETHODIMP Extract(LPCWSTR pszFile, UINT nIconIndex, HICON* phiconLarge, HICON* phiconSmall, UINT nIconSize);
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// IUnknown helpers
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STDMETHODIMP QueryInterface(REFIID riid, void** ppv);
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STDMETHODIMP_(ULONG) AddRef();
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STDMETHODIMP_(ULONG) Release();
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// derived class implements these
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virtual HRESULT _GetIconLocationW(UINT uFlags, LPWSTR pszIconFile,
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UINT cchMax, int *piIndex, UINT *pwFlags) PURE;
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virtual HRESULT _ExtractW(LPCWSTR pszFile, UINT nIconIndex,
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HICON *phiconLarge, HICON *phiconSmall, UINT nIconSize) PURE;
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CExtractIconBase();
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protected:
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virtual ~CExtractIconBase();
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private:
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LONG _cRef;
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};
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