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I wrote this small function to retrieve the available SSID's of WiFi access points in your area (the ones your computer can see).
Hope it's useful to someone. Note that this works on MacOS X only and that you need to add uses process to your code.
{ GetAvailableWiFiSSIDs
Scan WiFi network for available SSID's
Returns a string with SSID's separated by new lines
or "(no WiFi networks found)" when WiFi was disabled, unavailable or no networks were found }
function GetAvailableWiFiSSIDs:string;
var s : ansistring;
dataText:TStringList;
cutOffPosition:integer;
Counter:integer;
begin
s:='';
if RunCommand('/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport',['-s'],s) and (s<>'') then
begin
dataText:=TStringList.Create;
dataText.Text:=s;
if dataText.Count>0 then
begin
cutOffPosition:=pos(' BSSID',dataText.Strings[0])-1; // BSSID is lined up with the end of SSID
for Counter:=0 to dataText.Count-1 do
dataText.Strings[Counter]:=Trim(Copy(dataText.Strings[Counter],0,cutOffPosition));
dataText.Delete(0); // first line is just a header
s:=dataText.Text;
dataText.Free;
end;
end;
if s='' then s:='(no WiFi networks found)';
GetAvailableWiFiSSIDs := s;
end;