How to use Selenium WebDriver on local webpage (on my PC) instead of one located somewhere online?

I want to use Selenium WebDriver on a webpage that I have on my hard disc. I've tried to something like:

selenium = new WebDriverBackedSelenium(driver, "C:\\...dispatcher.html");

...instead of the normal:

selenium = new WebDriverBackedSelenium(driver, "http://www.dunnowhattodo.org");

...but it doesn't work (I get the error "unknown protocol: c").