Can Internet access be shared via a wireless network?

All three devices have internal NIC cards.

I've been getting the runaround on if this is even possible and would appreciate help in 'userease'. I'm a software person, not a hardware type.
Jaci – anything is possible. The only issue I can see is that the computers will have to be fairly close together as you're not using an access point.

Here's the best way to approach it:
[Host Desktop]

1. Make sure you have your Internet connection working.
2. Go to: Start Menu -> Control Panel -> Network Connections
   1. Right Click on your USB Network (Your Internet Connection)
   2. On the 'Advanced' tab click 'Share My Internet Connection
   3. If there is 'Choose an interface to share' box, select the Wireless Adapter Interface.
3. Go to your wireless configuration settings
   1. Create a new profile
   2. Enter a network name of your choice
   3. Make sure you turn on 'ad-hoc' mode.

[Notebook]

1. Make sure that the wireless LAN interface is set for DHCP (Server set IP address) and Server Set DNS.
2. Go to your wireless configuration settings
   1. Create a new profile
   2. Enter the same network name as above
   3. Make sure you turn on 'ad-hoc' mode.

[HP Desktop] – as per Notebook

1. Make sure that the wireless LAN interface is set for DHCP (Server set IP address) and Server Set DNS.
2. Go to your wireless configuration settings
   1. Create a new profile
   2. Enter the same network name as above
   3. Make sure you turn on 'ad-hoc' mode.

And really that should be it!
Regards, Graham