windows-xp/Source/XPSP1/NT/shell/inc/dspsprt.h

#ifndef __DSPSPRT_H__
#define __DSPSPRT_H__

// get ITypeInfo uuid/lcid out of type library
STDAPI GetTypeInfoFromLibId(LCID lcid, REFGUID libid,
    USHORT wVerMajor, USHORT wVerMinor, 
    REFGUID uuid, ITypeInfo **ppITypeInfo);

//
// Helper C++ class used to share code for the IDispatch implementations
//
// Inherit from this class passing this IDispatch's IID to the ctor
// 
class CImpIDispatch
{
    public:

        // We need access to the virtual QI -- define it PURE here
        virtual STDMETHODIMP QueryInterface(REFIID riid, LPVOID * ppvObj) PURE;

    protected:
        CImpIDispatch(REFGUID libid, USHORT wVerMajor, USHORT wVerMinor, REFIID riid);
        virtual ~CImpIDispatch(void);

        // For raising exceptions
        void Exception(WORD);

        // IDispatch members
        STDMETHODIMP GetTypeInfoCount(UINT *);
        STDMETHODIMP GetTypeInfo(UINT, LCID, ITypeInfo **);
        STDMETHODIMP GetIDsOfNames(REFIID, OLECHAR **, UINT, LCID, DISPID *);
        STDMETHODIMP Invoke(DISPID, REFIID, LCID, WORD, DISPPARAMS *, VARIANT *, EXCEPINFO *, UINT *);

    private:
        REFIID      m_riid;
        REFGUID     m_libid;
        USHORT      m_wVerMajor;
        USHORT      m_wVerMinor;

        ITypeInfo  *m_pITINeutral; // Cached Type information
};

#endif // __DSPSPRT_H__