将Base64编码的图像转换为HObject

最近项目需求，需要将Base64编码的图像转化为HObject，使用genImage1生成图像失败，请教各位大佬有无解决方案？
        CBase64ToHobject base64;
        int datalen(0);
        DWORD dwritelen(0);
        std::string strdcode = base64.Decode(strData.data(), strData.size(), datalen);
        const char* a = strdcode.c_str();
        char* b = new char[strdcode.length() + 1];
        memset(b, 0, strdcode.length() + 1);
        memcpy(b, a, strdcode.length());
        unsigned char* c = (unsigned char*)b;  //  byte与  unsigned char*相同
        for (int i = 0; i < strdcode.length(); i++)
        {
                std::cout << i << ":" << (int)(c[i]) << std::endl;
        }
        HObject img;
        HTuple windowhandle;
        GenImage1(&img, "byte", 377, 309, (Hlong)c);
        OpenWindow(0, 0, 377, 309, 0, "visible", "", &windowhandle);
        if (HDevWindowStack::IsOpen())
                DispObj(img, HDevWindowStack::GetActive());
        WaitSeconds(2);

GenImage1(&img, "byte", 377, 309, (Hlong)c);   "byte"改成uint2吧？