使用接口EnumPrinters 得到的size和count参数一样，值特别大

Question

使用接口 EnumPrinters(PRINTER_ENUM_CONNECTIONS | PRINTER_ENUM_LOCAL, NULL, 2, NULL, 0, &size, &count);获取到的size和count参数是一样的，而且数值特别大，但是后面访问打印机名的时候出现异常crash，为什么？

    DWORD size= 0;
    DWORD count = 0;
    ::EnumPrinters(PRINTER_ENUM_CONNECTIONS | PRINTER_ENUM_LOCAL, NULL, 2, NULL, 0, &size, &count);
    BYTE* buffer = new BYTE[size];
    ::EnumPrinters(PRINTER_ENUM_CONNECTIONS | PRINTER_ENUM_LOCAL, NULL, 2, buffer, size, &size, &count);
    if (count != 0)
    {
        PRINTER_INFO_2* info = (PRINTER_INFO_2*)buffer;
        for (DWORD i = 0; i < count; i++)
        {
            Printer printer;
            printer.pName = createCopyString(info->pPrinterName); // Causes a crash here
            ++info;
       }

查阅了官方文档，没有帮助