Is There Anyway to Continously Know My Neighborhood Wifi Pass Since I Know His

Network Name (SSID):

Key Type :

Key (Hex) :

Key (Ascii) :

Adapter Name

and his account and this info

Model Number

Firmware Version

Software Version

LAN MAC Address

DSL MAC Address

WAN IP Address

Interface

PPP Username...

to make it clear.. i just simply borrowed my friend/neighborhood laptop and put my flash drive and secretly running a wireless key viewer to know his wifi password. but after a few days he already change the WiFi password? is there anyway to continously know? without borrowing his laptop? we are both running a windows7 starter OS . i guess he"s suspecting me about stealing his wifi pass? thanks in advance,,, please do educate me