win32环境下显示中文

//编码转换
    //#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
    //    string title = "成绩";
    //    GBK2UTF8(title,"gb2312","utf-8");
    //#endif
    static int GBK2UTF8(std::string & gbkStr, const char* toCode, const char* fromCode)
    {
        iconv_t iconvH;
        iconvH = iconv_open(fromCode, toCode);
        if (iconvH == )
        {
            return -;
        }  

        const char* strChar = gbkStr.c_str();
        const char** pin = &strChar;
        size_t strLength = gbkStr.length();
        char* outbuf = (char*) malloc(strLength*);
        char* pBuff = outbuf;  

        memset( outbuf, , strLength*);
        size_t outLength = strLength*;
        if (- == iconv(iconvH, pin, &strLength, &outbuf, &outLength))
        {
            iconv_close(iconvH);
            return -;
        }
        gbkStr = pBuff;
        iconv_close(iconvH);
        return ;
    }