Heres a list of blog posts avilable

2012-08-09 - C++ - Check an IP Address is in a IP Mask
2012-03-08 - C - UDP Socket example
2012-02-17 - C - IP address validation
2012-02-15 - C - Get current ip address of an interface
2011-12-11 - C - Linux get mac address from interface
2011-02-10 - CSharp - Wake on Lan (WOL) Packet