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#ifndef COLUMNINFO_HXX_INCLUDED
#define COLUMNINFO_HXX_INCLUDED

#if defined _MSC_VER
#pragma warning(push, 1)
#pragma warning(disable:4917)
#endif
#include <shlobj.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif 


class CColumnInfo : public IColumnProvider  
{
public:
	CColumnInfo(long RefCnt = 1);
	virtual ~CColumnInfo();

	//-----------------------------
	// IUnknown methods
	//-----------------------------

	virtual HRESULT STDMETHODCALLTYPE QueryInterface( 
            REFIID riid,
            void __RPC_FAR *__RPC_FAR *ppvObject);
        
    virtual ULONG STDMETHODCALLTYPE AddRef( void);
        
    virtual ULONG STDMETHODCALLTYPE Release( void);

	//-----------------------------
	// IColumnProvider
	//-----------------------------

    virtual HRESULT STDMETHODCALLTYPE Initialize(LPCSHCOLUMNINIT psci);

    virtual HRESULT STDMETHODCALLTYPE GetColumnInfo(DWORD dwIndex, SHCOLUMNINFO *psci);

    virtual HRESULT STDMETHODCALLTYPE GetItemData(
		LPCSHCOLUMNID pscid, LPCSHCOLUMNDATA pscd, VARIANT *pvarData);

private:
	bool IsOOFileExtension(wchar_t* Extension) const;

private:
	long	m_RefCnt;	
};

#endif 
