I want to open the Internet explorer on the yahoo mail account depending on the username and password were entered by the user into textboxes and when click on a button the internet explorer will open on the user account after this page had opened the user can access his account such as sending messages and open inbox messages to read the messages. in another word i want to make user login to his mail through windows application.

  my code:

private void button1_Click(object sender, EventArgs e)

{

string id = textBox1.Text;

string pass = textBox2.Text;

login(id,pass)

}

private void login(x,y)

{

}

please tell me what is the appropriate code that should be put in the function login(x,y) to work as i want.

I doubt very much you can.

If you want to open IE with a given URL then you can use the System.Diagnostics.Process class to load the URL, e.g.:

System.Diagnostics.Process.Start("http://www.google.com");

If you know a URL that can redirect to Yahoo mail then you can use that, but I doubt there is a URL that will automatically log the user in as this would be a huge security hole.

/- Sam Judson : Wrox Technical Editor -/

You said it Sam.

To forgo Yahoo's login page calls for a black hat handy :P.

Merawwa, I would advise you to stay clean and straightforward, go thru the channel, use Yahoo's authentication API. Use them to let the user login normally, (now here you can have a bit of a say over how much of the login page you wanna show, modify the browser window parameters), then you can redirect to mail.yahoo.com to get to the inbox or where ever it is you wanna redirect your user to.

Learn about these APIs here
http://developer.yahoo.com/dotnet/howto-bbauth_cs.html

Regards
Ankur