Google Maps search

How would I go about creating:

• a program which can search Google maps
• return all the results for a specific latitude within a radius of x miles, and
• return the corresponding data from each search item, eg the company name, the rating of that company, number of reviews, etc.

Any help appreciated!

EDIT: the part I'm having most difficulty with is using Fiddler2 to record the data that needs to be sent via HttpWebRequest. If anybody is kind enough to look into this for me, I would be incredibly grateful!