Re: CMap and struct

Thanks for your reply Joseph.

I have already tried a few combinations such as the one you suggested.

Yours will create the following errors:

error C2440: 'type cast' : cannot convert from 'SDataType' to
'DWORD_PTR' (refers to the "return" line in

template<class ARG_KEY>
AFX_INLINE UINT AFXAPI HashKey(ARG_KEY key)
{
    // default identity hash - works for most primitive values
    return (DWORD)(((DWORD_PTR)key)>>4);
}
)

plus the following error:

error C2678: binary '==' : no operator found which takes a left-hand
operand of type 'const SDataType' (or there is no acceptable
conversion)
        D:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc
\include\afxtempl.h(1544) : see reference to function template
instantiation 'BOOL CompareElements<KEY,SDataType>(const TYPE *,const
ARG_TYPE *)' being compiled
        with
        [
            KEY=SDataType,
            TYPE=SDataType,
            ARG_TYPE=SDataType
        ]

refering to

template<class TYPE, class ARG_TYPE>
BOOL AFXAPI CompareElements(const TYPE* pElement1, const ARG_TYPE*
pElement2)
{
    ASSERT(AfxIsValidAddress(pElement1, sizeof(TYPE), FALSE));
    ASSERT(AfxIsValidAddress(pElement2, sizeof(ARG_TYPE), FALSE));

    return *pElement1 == *pElement2; // this line
}