Retriving RtlIpv4StringToAddress fails

[Lucassergei]

HMODULE hMod=LoadLibrary("ntdll.dll")
if(hMod!=NULL)
{
    ret=(RTLIP4TOSTRING)GetProcAddress(hMod,"RtlIpv4StringToAddress");
    if(ret==NULL)
    {
         //error
    } 
}

Could someone tell me why I always get "ret" as NULL ? I am using Vista SP1. Thank you

[ovidiucucu]

It always returns NULL because there is no "RtlIpv4StringToAddress" exported by ntdll.dll. Not even in Windows Vista or Windows 7.
Instead, use "RtlIpv4StringToAddressA" or "RtlIpv4StringToAddressW" if you want the ANSI or UNICODE version, respectively.