Android Question check WiFi

I'm trying to check the availability and strength of WiFi:
<code>
if checkWiFi then
Job1.Initialize("Job1",Me)
Job1.PostString(sURL,"")
end if

sub checkWifi as boolean
Dim wifiTest As HttpJob
wifiTest.Initialize("wifiTest", Me)
wifiTest.Download("http://myServerAddress.com/testWiFi.txt")
if bWiFi then
return true
else
return false
end if
end sub

</code>
The success or failure of Job.Success in JobDone sets the global boolean variable bWiFi.
My problem is: the download doesn't have a chance to get to JobDone before the test for
bWiFi in sub CheckWiFi.

Any help would be greatly appreciated.