showing and managing websites in c#

I want to do 4 things with an external website:
-load it into webbrowser
-get inner text of some tags (located by class parameter)
-add java script code to the source of loaded website
-execute that script

I'm using Windows Forms and C#. I started with using WebBrowser, however i coudn't add any code to the source of it. I found that i should use IHTMLDocument2 for that, so I changed WebBrowser to AxSHDocVw.AxWebBrowser (which is COM version of the same thing). Now i can load page, but i have no idea how to get inner text of some tags (how to find tags in general) and how to execute a script (either by firing a "on click" event, or executing the script by name). Is there a way to do that without using pointer, with C#? Or perhaps is there any other way for doing what I need (using WebBrowser, this COM object or whatever)? I only need some example of how to do those things and i'll do the rest.
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DeadeyyeAuthor Commented:
Exoerteez - i've already made this, i was asking about how to get tags and script with this interface. Anyway, I found that you can simply use WebBrowser control to acces and modify your source code of www, so it fits me perfectly

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