Send Instant Message in iphone - iphone-sdk-3.0

I am New to iphone. Currently I am using Mac os 3.2, By using this version can i send Instant message programmatically? Because,I got an error like undelared MFMessageViewController.
What can I do? If it possible,then send sample code.
Thanks in Advance.

MFMessage service was made public for the iOS 4.0 and later.So if you want to integrate SMS facility then you will have to upgrade your XCode SDK 3.2(& iO.S >= 4.0).
You can implement SMS functionality by following the sample code provided by Apple.
https://developer.apple.com/library/ios/#samplecode/MessageComposer/Introduction/Intro.html
Cheers
Aditya

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