VC++ 读取注册表返回2的问题

Question

我想读取一下DHCP的 IP地址，可是RegQueryValue返回来2的错误，请大侠帮我看看，是怎么回事？多谢了！

int main(int argc, char* argv[])

{
HKEY hTT;
long lRet;

//lRet=RegOpenKey(HKEY_LOCAL_MACHINE,"SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{CF166061-CAE0-4198-9239-1B0C55432E0B}",&hTT);
lRet=RegOpenKeyEx(HKEY_LOCAL_MACHINE,"SYSTEM\\ControlSet001\\Services\\Tcpip\\Parameters\\Interfaces\\{CF166061-CAE0-4198-9239-1B0C55432E0B}",NULL,KEY_EXECUTE,&hTT);
if(lRet!=ERROR_SUCCESS)
{
    return -1;
}
TCHAR szChar[128];
long len=128;


lRet=RegQueryValue(hTT,"DhcpIPAddress",szChar,&len);
if(lRet!=ERROR_SUCCESS)
{
    return -2;
}
RegCloseKey(hTT);
printf("Hello World!\n");
return 0;

}

Answer 1

windows 7以上可能是权限不够。