how to find hotspot(Access point)?

[simsiss]

I am not live in US. but I can write english a little.
please answer my question.
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I want to make program using iPhone SDK 3.0

I want to know that "how to receive hotspot's name and signal strangth around me."


what can I read the reference or how can I get the source file like "Wi-fi finder" or "easy wi-fi" app.