I need some help in Visual C# 2008 Express.
I don't want you to write the full code , I just need some examples, and help documents.

The project aim:
With the application you can login to sites (that using cookies) through a small browser window (system.windows.forms.webbrowser). It is a normal browser. It displays example.com/login .php
I would like the user to login through this, to get the login cookies.

Than there is a textbox: user can enter an url
example.com/add_product.php?name=abcdefg&desc=abcdefghij&price=123
Than the application only "requests" the url (don't really download and don't displays is)
But on this part I cant use the browsers cookies , so I cant login.
I can't login with example.com/login.php?user=admin&pass=something too.
But I've exported the raw stream and the headers when I login with Firefox (data from HttpAnalyzer *code section)

I tried HttpWebRequest without and with CookieContainer but I can't get it work.

Is there any help or examples on this?
Or is there any way to use the HttpAnalyzer's data?

Please help me!
If you can't understand something, I can try to write down it again, because english is not my main language.

Thank you!


The HttpAnalyzer export:

RAW STREAM:
POST /login.php HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; hu; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 (.NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: hu-hu,hu;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-2,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://example.com/login.php?url=%2F
Cookie: __utma=21200424.3377429447400615000.1249065357.1249123348.1249144755.3; __utmz=21200424.1249065357.1.1.utmcsr=anotherdomain.com|utmccn=(referral)|utmcmd=referral|utmcct=/mail/read.fm; __utmb=21200424.1.10.1249144755; __utmc=21200424
Content-Type: application/x-www-form-urlencoded
Content-Length: 50

login=yes&user=admin&password=something


HEADER::
(Request-Line):POST /login.php HTTP/1.1
Host:example.com
User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; hu; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12 (.NET CLR 3.5.30729)
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language:hu-hu,hu;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding:gzip,deflate
Accept-Charset:ISO-8859-2,utf-8;q=0.7,*;q=0.7
Keep-Alive:300
Connection:keep-alive
Referer:http://example.com/login.php?url=%2F
Cookie:__utma=21200424.3377429447400615000.1249065357.1249123348.1249144755.3; __utmz=21200424.1249065357.1.1.utmcsr=anotherdomain.com|utmccn=(referral)|utmcmd=referral|utmcct=/mail/read.fm; __utmb=21200424.1.10.1249144755; __utmc=21200424
Content-Type:application/x-www-form-urlencoded
Content-Length:50