[RESOLVED] User Agent and WebBrowser

Hey guys, I made one website for apple devices using iwebkit. I'm willing to access it using my webbrowser1 but once I visit the site it won't load any css/style to display as a mobile website...
How can I edit the user agent to make the webbrowser think it's visiting the site under an apple device?

I tried this but didn't work...

vb Code:

WebBrowser1.Navigate("http://www.MYWEBSITEDEVELOPEDUSINGIWEBKIT.SOMETHING", Nothing, Nothing, "User-Agent: Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A537a Safari/419.3")