DHCP_IP_ADDRESS IpToDword(BYTE ip0, BYTE ip1, BYTE ip2, BYTE ip3){
    return ((DHCP_IP_ADDRESS)(ip0 << 24)) | ((DHCP_IP_ADDRESS)(ip1 << 16)) | ((DHCP_IP_ADDRESS)(ip2 << 8)) | ((DHCP_IP_ADDRESS)ip3);
}