Hi,
when the Password for a wireless connections is stored in Windows it can be red from command line.
Look for your WLAN Profile (SSID)
D:\> netsh wlan show profile
Userprofile
-----------
MyWLANZone
And simply show the key
D:\> netsh wlan show profile MyWLANZone key=clear
...
KeyContent : MySecretKey
...
Michael