Linking to a PHP page

I am using Visual Studio 2010 and VB.NET on a Windows 7 system. I can display my default ASPX page in a browser locally without any problems. But when I click a link for a PHP page, it downloads the PHP file rather than serving it up. This is the first time I've used PHP in my site.
In IIS 7, I created a new site (bound to port 1026) that points to a folder with just one file: index.php. When I enter http://localhost:1026 in my browser, it displays properly. This makes me think that I have PHP installed properly on my system. But for some reason, I can't display the page through Visual Studio. Can someone help me get this working? Thanks!