How do I display a Google gauge from a personal website, to Facebook?

ASP.NET 3.5 web site, implemented user log-in controls, so each user logs into their own page.

Upon logging in, they are presented with a Google Gauge displaying their current "value".

How do I get their specific Google Gauge (with their current value) to be shared on the individuals Facebook new feed, if they select to do so?

I have never us开发者_高级运维ed the Facebook API before and do not know where to start.

If you can point me in the right direction, I would greatly appreciate it.