文字コードの変換[MLang]

struct __declspec(uuid("275C23E1-3747-11D0-9FEA-00AA003F8646")) IMultiLanguage;

enum

{

    CODEPAGE_SHIFTJIS    = 932,

    CODEPAGE_EUCJP        = 51932,

    CODEPAGE_ISO2022JP    = 50220

};

    static HRESULT ConvertString(

        DWORD* pdwMode,

        DWORD dwSrcEncoding,

        DWORD dwDstEncoding,

        BYTE* pSrcStr,

        UINT* pcSrcSize,

        BYTE* pDstStr,

        UINT* pcDstSize)

    {

        HRESULT hr = S_OK;

        try

        {

            IMultiLanguagePtr spMultiLanguage = GetMultiLanguage();

            if (spMultiLanguage == NULL)

            {

                return E_FAIL;

            }

            hr = spMultiLanguage->ConvertString(

                pdwMode,

                dwSrcEncoding,

                dwDstEncoding,

                pSrcStr,

                pcSrcSize,

                pDstStr,

                pcDstSize);

            if (FAILED(hr))

            {

                return hr;

            }

        }

        catch (...)

        {

            return E_FAIL;

        }

        return hr;

    }

    static IMultiLanguagePtr GetMultiLanguage()

    {

        HRESULT hr = S_OK;

        IMultiLanguagePtr spMultiLanguage;

        hr = spMultiLanguage.CreateInstance(__uuidof(CMultiLanguage));

        if (FAILED(hr))

        {

            return NULL;

        }

        return spMultiLanguage;

    }