It is not possible to hide wireless network connection. But there are ways to hide the icon denoting the Wireless Network Connection in the control panel. For that first you would have to open the network connections folder and then select properties on the wireless adapter. Then look for a check box which says "Show icon in notification area when connected". It is located near the base of the property sheet.
Check this box and save the selected settings by clicking "OK". Then uncheck the box and you would see that the wireless network connection would no longer be visible in the system tray. But mark one thing that you will not be able to connect to wireless networks until the wireless network connections settings are cached.
Check this box and save the selected settings by clicking "OK". Then uncheck the box and you would see that the wireless network connection would no longer be visible in the system tray. But mark one thing that you will not be able to connect to wireless networks until the wireless network connections settings are cached.