Set ip settings from cpp(Qt)

Question

Its really hard going to code to save the ip settings(RegSetValueEx()) from cpp(By registry editing of WinCe). Its issue about encoding of string(which I parse to BYTE* and if I use hardcoded string,parsed it to same BYTE* it supports) Anybody can support for coding, will be good.Otherwise , please show me the different routes if you can. (Like batch file(setting ip with ipconfig) to execute from cpp).

HKEY hKey;
int res = RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"Comm\\ENET1\\Parms\\TcpIp", 0, KEY_WRITE, &hKey);
const BYTE* data = (BYTE*)text;
long ret = RegSetValueEx(hKey,L"IpAddress",0,REG_MULTI_SZ,data,16);
RegCloseKey(HKEY_LOCAL_MACHINE);

It should save ip on WinCe from cpp.

1. By batch file executing from cpp.
2. Registry editing from cpp.
3. Or any other method.