How to build an http post request ?

Recently i have been working on a small app that extracts data from a google sevice.
But now google has started an api service that allows users to directly post data to google accounts.here's the link
http://code.google.com/apis/accounts...alledApps.html

Now i have never worked with get/post http requests.So could some one guide on how to build one and then work with the responses that have arrived

Thanks

You need to be more specific. How far have you got and what are the responses you receive back from the server?