[Lubuntu 14.04] Connection Ad-Hoc between Windows 7 and Lubuntu

Hi

I have Lubuntu 14.04 with an Internet connection via USB stick and I have a computer with Windows 7.

Since both computers have wireless chips, I would like to create a wireless Ad-Hoc to share Internet.

So, how do I do this so that Windows 7 did not create a "undefined network"?

Thanks

Bye