I have a iphone 3gs and want to access wifi or wireless on toshiba satellite pro x200

Hi,

Laptop normally have single chip WiFi or Wireless Cards...

These cards could be used as client(connecting to wireless router), adhoc or access point(a WiFi card could be used as Access Point to route your LAN(Wired) connection on WLAN)...

Your laptop WiFi card is already busy as a Cleint, so if you want to use it as AdHoc, you have to remove all the other connection with the WIreless...ie, Disconnect the WLAN from connecting other devices, and follow the below mentioed steps to connect your device..

When you are using Client mode you are not able to use it on Ad-hoc or Access Point feature...

Setup laptop to Ad-Hoc
1)Navigate to control panel and choose network connection, Right click on the Wireless network connection and click on the Properties on Wireless NIC
2) Click-Wireless Networks Tab
3) Click-Add
4) Provide SSID Name, name to identify you rnetwork
5)Security -Net Auth: Open
6)Make -Data Encryption: Disabled
7) In the check box present-Check on This is a Computer to Computer (ad-hoc) network.
Change the IP address of the Wireless NIC card, by choosing TCp IP in the properties of WLAN and choosing TCP/IP v4 from the installed service

TCP/IP on Laptop
-IP: 10.0.0.1
-Subnet: 255.255.255.0

TCP/IP on iPhone
-Static IP
-IP: 10.0.0.2
-Subnet: 255.255.255.0

Now try searching for Wireless through your phone, you should able to connect..
Please leave me comment, if you need further assistance
Rnj VINODKUMAR