This is good.. I did this, but what I did different from you, was.
Once you are inside your minecraft world, and press Open to Lan.
There should come a message saying:
Local game hosted on port XXXXX
this port number is important.
When your friends is typing the IP adress wich you got from the Ipconfig. For example. 192.168.1.13 be sure to add the port the game was hosted on.
Like this: 192.168.1.13:XXXXX. This worked for me.
